The document provides an index and descriptions of various topics related to web development including:
1. The modulus operator and examples of using it to check for divisibility.
2. Relational and logical operators like greater than, less than, equal to and examples of using them in code.
3. Descriptions of do-while and for loops with examples.
4. An example using a parameterized constructor to initialize cube dimensions.
5. Examples of string methods like startsWith, length, and trim.
6. Descriptions and examples of overloading methods and constructors.
7. An example of inheritance with overriding methods.
8. An interface example with animal classes
Important java programs(collection+file)Alok Kumar
ย
The document contains 6 Java programming questions and solutions:
1. A program to find unique and duplicate items in an array.
2. A Product class with properties and methods to sort objects.
3. A program to merge contents of two text files into a third file.
4. A program to count the occurrences of specific words in a file.
5. A program to read a file, add contents to an ArrayList, and write to a new file.
6. A program to print consecutive characters in a string and their frequency.
The document contains 21 code snippets showing examples of various Java programming concepts. The code snippets cover topics such as classes and objects, inheritance, interfaces, exceptions, threads, applets, packages, input/output, and networking.
The document contains code snippets for various Java programs that perform tasks like calculating the area of a circle, finding the factorial of a number, displaying prime numbers, sorting an array, counting characters in a string, reversing a string, creating and running threads, handling exceptions, and creating a simple applet with buttons to change the background color. The code examples demonstrate basic Java programming concepts like classes, methods, loops, arrays, exceptions, threads, applets, and event handling.
The document discusses different ways to implement threading in Java programs. It provides code examples to demonstrate creating threads by extending the Thread class and implementing the Runnable interface. The code examples show printing output from both the main thread and child threads to illustrate threading concepts. Socket programming and RMI examples are also provided with code to implement client-server applications using threads.
The document contains code snippets for several Java programs including:
1. An Armstrong number checker that uses recursion to check if a number is an Armstrong number.
2. A binary search program that searches an integer array using a binary search algorithm.
3. A binary search on a float array using the Arrays binarySearch method.
The document then continues with additional code examples for recursive binary search, bubble sort, constructors, converting between object and primitive types, data input/output streams, encapsulation, enumerating a vector, exception handling, and creating threads by extending the Thread class.
This document discusses input/output (I/O) and file system access in Java. It covers the java.io.File and java.nio.file.Path classes for representing files and directories, and how to use them to check file/directory attributes, resolve paths, and manipulate files and directories by creating, deleting, copying, moving, etc. It also covers the java.io streams for byte and character I/O including InputStream, OutputStream, Reader, and Writer. Common stream operations like copying from input to output streams are demonstrated.
This document contains code examples demonstrating basic Java concepts like classes, objects, methods, constructors, static variables, and more. The examples show how to define Box classes with width, length and height attributes to calculate and print the volume. Later examples demonstrate method overloading, the use of this keyword, call by value vs reference, and default values of attributes. Constructors are used to initialize object attribute values.
Important java programs(collection+file)Alok Kumar
ย
The document contains 6 Java programming questions and solutions:
1. A program to find unique and duplicate items in an array.
2. A Product class with properties and methods to sort objects.
3. A program to merge contents of two text files into a third file.
4. A program to count the occurrences of specific words in a file.
5. A program to read a file, add contents to an ArrayList, and write to a new file.
6. A program to print consecutive characters in a string and their frequency.
The document contains 21 code snippets showing examples of various Java programming concepts. The code snippets cover topics such as classes and objects, inheritance, interfaces, exceptions, threads, applets, packages, input/output, and networking.
The document contains code snippets for various Java programs that perform tasks like calculating the area of a circle, finding the factorial of a number, displaying prime numbers, sorting an array, counting characters in a string, reversing a string, creating and running threads, handling exceptions, and creating a simple applet with buttons to change the background color. The code examples demonstrate basic Java programming concepts like classes, methods, loops, arrays, exceptions, threads, applets, and event handling.
The document discusses different ways to implement threading in Java programs. It provides code examples to demonstrate creating threads by extending the Thread class and implementing the Runnable interface. The code examples show printing output from both the main thread and child threads to illustrate threading concepts. Socket programming and RMI examples are also provided with code to implement client-server applications using threads.
The document contains code snippets for several Java programs including:
1. An Armstrong number checker that uses recursion to check if a number is an Armstrong number.
2. A binary search program that searches an integer array using a binary search algorithm.
3. A binary search on a float array using the Arrays binarySearch method.
The document then continues with additional code examples for recursive binary search, bubble sort, constructors, converting between object and primitive types, data input/output streams, encapsulation, enumerating a vector, exception handling, and creating threads by extending the Thread class.
This document discusses input/output (I/O) and file system access in Java. It covers the java.io.File and java.nio.file.Path classes for representing files and directories, and how to use them to check file/directory attributes, resolve paths, and manipulate files and directories by creating, deleting, copying, moving, etc. It also covers the java.io streams for byte and character I/O including InputStream, OutputStream, Reader, and Writer. Common stream operations like copying from input to output streams are demonstrated.
This document contains code examples demonstrating basic Java concepts like classes, objects, methods, constructors, static variables, and more. The examples show how to define Box classes with width, length and height attributes to calculate and print the volume. Later examples demonstrate method overloading, the use of this keyword, call by value vs reference, and default values of attributes. Constructors are used to initialize object attribute values.
The document contains 4 code snippets demonstrating different ways to take input in Java programs:
1) Using command line arguments and the args array to print a greeting with a passed in name
2) Swapping two integers entered from the keyboard using only two variables
3) Reading input from the keyboard using InputStreamReader and BufferedReader classes
4) Taking input using the Scanner class to read an integer, string, and double from console input
soft-shake.ch - Java SE 7: The Fork/Join Framework and Project Coinsoft-shake.ch
ย
Julien Ponge
This talk introduces part of the Java SE 7 novelties. The fork/join framework aims at making parallel programming simpler, while Project Coin brings a set of subtle yet useful changes to the Java programming language.
http://soft-shake.ch/2011/conference/sessions/java/2011/09/06/java7.html
This document contains source code for several Java programs that demonstrate concepts related to networking and URLs. The programs cover topics like retrieving a URL, getting URL information, working with InetAddress, demonstrating parts of a URL, and connectionless and connection-oriented communication between a server and client using UDP and TCP sockets. The code examples are accompanied by expected output.
The document contains code for 9 Java programming practical assignments. The first practical accepts coefficients for a quadratic equation, calculates the roots and outputs the results. The second accepts two matrices as input and calculates their addition. The third sorts an array of strings in ascending order. The fourth creates an Animal interface and classes that implement it to demonstrate polymorphism. The remaining practicals demonstrate inheritance, exceptions, GUI programming using Swing components, and the List interface.
Basic java, java collection Framework and Date Time APIjagriti srivastava
ย
This document provides an overview of basic Java concepts including classes, objects, methods, inheritance, and polymorphism. It also discusses Java tools, OOP concepts, and how to create classes, objects, and methods. Additionally, it covers Java control structures like if/else and for loops, arrays, and different collection classes like ArrayList, LinkedList, and HashMap. Finally, it presents Java date/time API classes and examples of parsing, comparing, and performing calculations on dates.
Here are some suggestions to improve the test method name:
- shouldReturnNullWhenQueryReturnsNull
- shouldPassNullFromDaoWhenQueryReturnsNull
Using "should" makes the intent clearer - we expect the method to return null under certain conditions. Describing those conditions ("when query returns null") in the name provides more context than a generic "testQuery".
Overall, test method names should clearly communicate what is being tested and under what conditions we expect the test to pass or fail. This helps readers understand the purpose and focus of each test.
The document discusses features and enhancements in Groovy 1.8.0, including improved AST processing, new logging capabilities using the @Log annotation, support for method locks with @WithReadLock and @WithWriteLock, interruptible loops, memoization of recursive functions, and integration with JSON parsing. Slides provide code examples and diagrams to illustrate these Groovy language and library improvements.
The document provides code examples for several Java programming concepts:
1. A program that takes command line arguments, calculates the sum and average of the numbers passed, and displays the results.
2. A Student class with member functions to read and display student details like name and age.
3. A Square class with data members for length, area, and perimeter, and member functions to read, compute values, and display details.
The document contains 10 additional examples covering topics like inheritance, packages, exceptions, threads, and GUI programming.
Java Universal super class java.lang.Object is discussed comprehensively with code snippets.
Also covers:
a) Why we need inheritance and dynamic method dispatch
b) Need of a universal parent
c) Delegation and proxies
d) toString(), clone(), equals(), notify()
The document discusses the Apache Commons project, which develops reusable Java components. It notes that Commons components allow for faster and smaller development by avoiding reinventing common functions. The document outlines several active Commons components like Collections, IO, Lang, and Logging, as well as sandbox and dormant components. It emphasizes that 80% of Commons components have no dependencies on each other, promoting flexibility and reuse.
Here are the steps to move the frontend out of the Main class and into its own thread:
1. Create a Frontend class that extends AbstractHandler and implements Runnable
2. Move the frontend handling logic from Main into the run() method of Frontend
3. Add a handleCount field to Frontend of type AtomicInteger
4. In the run() method, periodically log the value of handleCount every 5 seconds
5. In the handle() method, increment handleCount using getAndIncrement() after generating the page
6. From Main, instantiate a Frontend object and call start() on its thread to run asynchronously
This will separate the frontend into its own thread of execution. The handleCount field
This document compares several JVM languages including Java, Scala, Groovy, Kotlin, Clojure and Ceylon. It discusses their classification as functional or object-oriented, static or dynamic typing. It also summarizes key features of each language such as support for functional programming paradigms, closures, immutable data structures, and parallel processing capabilities. The document provides code examples to illustrate concepts in Scala, Kotlin, and Groovy.
This document discusses using the F# programming language for unit testing. It provides examples of writing unit tests in F# using different testing frameworks like NUnit, FsUnit, and Unquote. It also shows how to mock objects and set up expected behavior using mocking libraries in F# like Moq, FakeItEasy, and Foq. Foq is a mocking library for F# that allows mocking using code quotations or a fluent interface. The document compares the lines of code of different mocking libraries and versions of Foq. It promotes F# as an effective testing language.
This document provides an overview and agenda for a presentation about Java. It discusses Java history, object-oriented programming concepts like classes and interfaces, inheritance and polymorphism, exception handling, primitive types and wrappers, inner classes, generics, and new features introduced since Java 5 such as varargs, enhanced for loops, annotations, and auto boxing/unboxing. The presentation covers these topics over multiple slides with code examples.
Easy Going Groovy 2nd season on DevLOVEUehara Junji
ย
The document appears to be a slide presentation about Groovy programming. It includes slides with code samples and descriptions of Groovy features like Grails, Griffon, Spock testing, and integrating Ant tasks. Later slides demonstrate using Groovy with HtmlUnit to programmatically upload a file to a wiki site.
The document contains 17 Java code snippets that provide solutions to common programming problems and examples. Some of the problems addressed include: reversing an integer, checking if two words are anagrams, palindrome checking, merging two sorted arrays, left rotation of an array, sorting an array of 0s, 1s and 2s, counting character occurrences in a string, factorial, Fibonacci series, prime number checking, bubble sort, and substring searching. The code snippets provide full programs or methods to solve each problem in 1-5 steps or lines of code each.
The Ring programming language version 1.6 book - Part 184 of 189Mahmoud Samir Fayed
ย
This section provides an overview of the Ring programming language, including lists of its 49 keywords, 198 functions, common compiler errors, and the structure and instructions of its virtual machine (VM). The keywords include common ones like class, func, if, and while. The many functions cover strings, files, math, objects, and the VM. Compiler errors relate to missing elements like ok or end in control structures. The VM executes Ring code through its instructions and uses scopes and pointers to manage memory.
Let's go Developer 2011 sendai Let's go Java Developer (Programming Language ...Uehara Junji
ย
The document compares Java and Groovy implementations of a word counting program. The Java version uses HashMaps and file input/output to count word frequencies, while the Groovy version uses a default map with integer values and sorts the entries by value before outputting. Both programs take a file, split the contents on whitespace, count each word, and output the results.
The document contains 17 code snippets that demonstrate various Java programming concepts like loops, arrays, methods, classes, input/output, etc. Specifically, the code snippets show:
1. Using for loops to print numeric series
2. Accepting user input of different data types using Scanner and parsing
3. Using StringTokenizer and Scanner classes
4. Finding largest number among 3 inputs and printing tables
5. Demonstrating 2D arrays, array of objects, and command line arguments
6. Various String class methods like length(), substring(), indexOf() etc.
The document contains 21 programming problems involving Java concepts like arrays, loops, methods, classes, objects, constructors, and more. For each problem, source code is provided to demonstrate how to solve the problem, followed by sample output. Some key problems include: (1) printing series using nested loops, (2) receiving user input of different data types, (3) using StringTokenizer and Scanner classes, (4) finding largest of 3 numbers, (5) using 2D arrays and array of objects.
The document contains 4 code snippets demonstrating different ways to take input in Java programs:
1) Using command line arguments and the args array to print a greeting with a passed in name
2) Swapping two integers entered from the keyboard using only two variables
3) Reading input from the keyboard using InputStreamReader and BufferedReader classes
4) Taking input using the Scanner class to read an integer, string, and double from console input
soft-shake.ch - Java SE 7: The Fork/Join Framework and Project Coinsoft-shake.ch
ย
Julien Ponge
This talk introduces part of the Java SE 7 novelties. The fork/join framework aims at making parallel programming simpler, while Project Coin brings a set of subtle yet useful changes to the Java programming language.
http://soft-shake.ch/2011/conference/sessions/java/2011/09/06/java7.html
This document contains source code for several Java programs that demonstrate concepts related to networking and URLs. The programs cover topics like retrieving a URL, getting URL information, working with InetAddress, demonstrating parts of a URL, and connectionless and connection-oriented communication between a server and client using UDP and TCP sockets. The code examples are accompanied by expected output.
The document contains code for 9 Java programming practical assignments. The first practical accepts coefficients for a quadratic equation, calculates the roots and outputs the results. The second accepts two matrices as input and calculates their addition. The third sorts an array of strings in ascending order. The fourth creates an Animal interface and classes that implement it to demonstrate polymorphism. The remaining practicals demonstrate inheritance, exceptions, GUI programming using Swing components, and the List interface.
Basic java, java collection Framework and Date Time APIjagriti srivastava
ย
This document provides an overview of basic Java concepts including classes, objects, methods, inheritance, and polymorphism. It also discusses Java tools, OOP concepts, and how to create classes, objects, and methods. Additionally, it covers Java control structures like if/else and for loops, arrays, and different collection classes like ArrayList, LinkedList, and HashMap. Finally, it presents Java date/time API classes and examples of parsing, comparing, and performing calculations on dates.
Here are some suggestions to improve the test method name:
- shouldReturnNullWhenQueryReturnsNull
- shouldPassNullFromDaoWhenQueryReturnsNull
Using "should" makes the intent clearer - we expect the method to return null under certain conditions. Describing those conditions ("when query returns null") in the name provides more context than a generic "testQuery".
Overall, test method names should clearly communicate what is being tested and under what conditions we expect the test to pass or fail. This helps readers understand the purpose and focus of each test.
The document discusses features and enhancements in Groovy 1.8.0, including improved AST processing, new logging capabilities using the @Log annotation, support for method locks with @WithReadLock and @WithWriteLock, interruptible loops, memoization of recursive functions, and integration with JSON parsing. Slides provide code examples and diagrams to illustrate these Groovy language and library improvements.
The document provides code examples for several Java programming concepts:
1. A program that takes command line arguments, calculates the sum and average of the numbers passed, and displays the results.
2. A Student class with member functions to read and display student details like name and age.
3. A Square class with data members for length, area, and perimeter, and member functions to read, compute values, and display details.
The document contains 10 additional examples covering topics like inheritance, packages, exceptions, threads, and GUI programming.
Java Universal super class java.lang.Object is discussed comprehensively with code snippets.
Also covers:
a) Why we need inheritance and dynamic method dispatch
b) Need of a universal parent
c) Delegation and proxies
d) toString(), clone(), equals(), notify()
The document discusses the Apache Commons project, which develops reusable Java components. It notes that Commons components allow for faster and smaller development by avoiding reinventing common functions. The document outlines several active Commons components like Collections, IO, Lang, and Logging, as well as sandbox and dormant components. It emphasizes that 80% of Commons components have no dependencies on each other, promoting flexibility and reuse.
Here are the steps to move the frontend out of the Main class and into its own thread:
1. Create a Frontend class that extends AbstractHandler and implements Runnable
2. Move the frontend handling logic from Main into the run() method of Frontend
3. Add a handleCount field to Frontend of type AtomicInteger
4. In the run() method, periodically log the value of handleCount every 5 seconds
5. In the handle() method, increment handleCount using getAndIncrement() after generating the page
6. From Main, instantiate a Frontend object and call start() on its thread to run asynchronously
This will separate the frontend into its own thread of execution. The handleCount field
This document compares several JVM languages including Java, Scala, Groovy, Kotlin, Clojure and Ceylon. It discusses their classification as functional or object-oriented, static or dynamic typing. It also summarizes key features of each language such as support for functional programming paradigms, closures, immutable data structures, and parallel processing capabilities. The document provides code examples to illustrate concepts in Scala, Kotlin, and Groovy.
This document discusses using the F# programming language for unit testing. It provides examples of writing unit tests in F# using different testing frameworks like NUnit, FsUnit, and Unquote. It also shows how to mock objects and set up expected behavior using mocking libraries in F# like Moq, FakeItEasy, and Foq. Foq is a mocking library for F# that allows mocking using code quotations or a fluent interface. The document compares the lines of code of different mocking libraries and versions of Foq. It promotes F# as an effective testing language.
This document provides an overview and agenda for a presentation about Java. It discusses Java history, object-oriented programming concepts like classes and interfaces, inheritance and polymorphism, exception handling, primitive types and wrappers, inner classes, generics, and new features introduced since Java 5 such as varargs, enhanced for loops, annotations, and auto boxing/unboxing. The presentation covers these topics over multiple slides with code examples.
Easy Going Groovy 2nd season on DevLOVEUehara Junji
ย
The document appears to be a slide presentation about Groovy programming. It includes slides with code samples and descriptions of Groovy features like Grails, Griffon, Spock testing, and integrating Ant tasks. Later slides demonstrate using Groovy with HtmlUnit to programmatically upload a file to a wiki site.
The document contains 17 Java code snippets that provide solutions to common programming problems and examples. Some of the problems addressed include: reversing an integer, checking if two words are anagrams, palindrome checking, merging two sorted arrays, left rotation of an array, sorting an array of 0s, 1s and 2s, counting character occurrences in a string, factorial, Fibonacci series, prime number checking, bubble sort, and substring searching. The code snippets provide full programs or methods to solve each problem in 1-5 steps or lines of code each.
The Ring programming language version 1.6 book - Part 184 of 189Mahmoud Samir Fayed
ย
This section provides an overview of the Ring programming language, including lists of its 49 keywords, 198 functions, common compiler errors, and the structure and instructions of its virtual machine (VM). The keywords include common ones like class, func, if, and while. The many functions cover strings, files, math, objects, and the VM. Compiler errors relate to missing elements like ok or end in control structures. The VM executes Ring code through its instructions and uses scopes and pointers to manage memory.
Let's go Developer 2011 sendai Let's go Java Developer (Programming Language ...Uehara Junji
ย
The document compares Java and Groovy implementations of a word counting program. The Java version uses HashMaps and file input/output to count word frequencies, while the Groovy version uses a default map with integer values and sorts the entries by value before outputting. Both programs take a file, split the contents on whitespace, count each word, and output the results.
The document contains 17 code snippets that demonstrate various Java programming concepts like loops, arrays, methods, classes, input/output, etc. Specifically, the code snippets show:
1. Using for loops to print numeric series
2. Accepting user input of different data types using Scanner and parsing
3. Using StringTokenizer and Scanner classes
4. Finding largest number among 3 inputs and printing tables
5. Demonstrating 2D arrays, array of objects, and command line arguments
6. Various String class methods like length(), substring(), indexOf() etc.
The document contains 21 programming problems involving Java concepts like arrays, loops, methods, classes, objects, constructors, and more. For each problem, source code is provided to demonstrate how to solve the problem, followed by sample output. Some key problems include: (1) printing series using nested loops, (2) receiving user input of different data types, (3) using StringTokenizer and Scanner classes, (4) finding largest of 3 numbers, (5) using 2D arrays and array of objects.
The document contains code for several Java programs that implement common data structures and client-server applications. Specifically, it includes programs to:
1. Implement a stack using an array and perform push and pop operations.
2. Implement a queue using an array and perform insertion, deletion, and display operations.
3. Implement a singly linked list and perform operations like creation, addition, deletion, and display of nodes.
4. Implement a producer-consumer problem using threads and synchronization to add and remove elements from a shared queue.
The document contains code for implementing various data structures and algorithms in Java, including a stack, queue, linked list, producer-consumer problem, scrolling text applet, and client-server file transfer program. The stack, queue, and linked list code demonstrates how to create the data structures and perform common operations like push, pop, insert, delete, and display. The producer-consumer code uses threads and synchronization to model the scenario. The scrolling text applet animates text moving across the screen. The client-server code allows a client to request a file from a server, which then sends the file contents to display on the client.
The document provides examples of Java code demonstrating various programming concepts like loops, conditional statements, methods, arrays and string manipulation. It includes code snippets to print "Hello World", check if a number is even or odd, print multiplication tables, convert temperatures between Fahrenheit and Celsius scales, take input from the user and perform basic operations on strings. The examples illustrate the use of various loops like for, while and do-while loops, if-else statements, methods and built-in string/array methods in Java.
The document contains code snippets from 3 weekly coding assignments:
1) A Java program to check if a string is a palindrome. It compares characters at the beginning and end of the string.
2) A Java program to sort a list of names in ascending order using string comparison and swapping.
3) A Java program to count the frequency of words in a given text by tokenizing, sorting, and printing the words.
java slip for bachelors of business administration.pdfkokah57440
ย
The document contains code snippets from multiple Java programs. The code covers topics like:
- Printing characters from A-Z and a-z using for loops
- Copying content from one file to another while filtering non-alphabetic characters
- Finding the number of vowels in a user-input string
- Creating a GUI program to track mouse click and movement coordinates
- Checking if a number is an Armstrong number
- Calculating the area and volume of geometric shapes like cone and cylinder based on user input
- Creating patterns using nested for loops
- Deleting text files and getting file details from command line arguments
- Handling exceptions for divide by zero
- Transposing a matrix by swapping row and column
Internet and Web Technology (CLASS-16) [Basic Elements of Java Program] | NIC...Ayes Chinmay
ย
The document discusses various concepts in Java programming including basic elements of Java programs, strings, date and time, switch statements, methods, recursion, polymorphism through method overloading and overriding, user input, and sample questions. It provides code examples to demonstrate strings, date/time, switch statements, methods, recursion, polymorphism, and user input. It also defines method overloading and overriding and compares the two.
program list:
WAP program to show constructor overloading using static member.
WAP to implement multilevel inheritance and method overriding.
WAP to implement interface class and show use of package.
WAP to implement multilevel exception handling and create your own exception.
WAP to implement 3 threads such that 1st sleeps for 200ms, 2nd for 400ms and 3rd for 600ms.
WAP to create applet of moving banner.
WAP to make a simple calculator.
Build a client server chat application.
This document provides an outline and notes from a lecture on types, methods, and conditionals in Java. It introduces boolean, int, double, and String types, as well as variables, operators, and order of operations. It discusses defining and calling methods, including parameters and return values. It also covers if, else, and else if statements for conditional execution, and comparison operators.
The document provides examples of Java code using try, catch, throw, and exceptions to handle errors and exceptions. Program 36 introduces a try-catch block to handle potential InputMismatchExceptions from user input. Program 37 uses try-catch-finally to handle an ArithmeticException from division by zero and ensure the finally block always executes. Program 38 demonstrates multiple catch blocks to handle different exception types.
Java is a cross-platform language originally developed by James Gosling at Sun Microsystems. It enables writing programs for many operating systems using a C/C++-like syntax but with a simpler object model and fewer low-level facilities. Java programs are compiled to bytecode that can run on any Java Virtual Machine (JVM) regardless of computer architecture. Common Java development tools include Eclipse and NetBeans integrated development environments.
The document discusses Java streams and I/O. It defines streams as abstract representations of input/output devices that are sources or destinations of data. It describes byte and character streams, the core stream classes in java.io, predefined System streams, common stream subclasses, reading/writing files and binary data with byte streams, and reading/writing characters with character streams. It also covers object serialization/deserialization and compressing files with GZIP.
The document discusses passing objects to methods in Java. It defines a Block class with dimensions and volume that can be passed to methods to compare blocks. The sameBlock() method returns true if the dimensions match, and sameVolume() returns true if the volumes match. The main method creates Block objects and calls the methods to test equality. This demonstrates how objects can be passed to methods and their properties compared.
OrderTest.javapublic class OrderTest { ย ย ย ย Get an arra.pdfakkhan101
ย
OrderTest.java
public class OrderTest {
/**
* Get an array of specified size and pass it to Order.order().
* Report the results.
*/
public static void main(String[] args) {
if (args.length != 1) {//1
System.out.println(\"Usage: java OrderTest sizeOfArray\ \"
+ \"\\tor\ \\tjava OrderTest arrayFile\");
System.exit(1);
}
// create or read the int[]
int size = 0;
int[] array = new int[0];//5
try {
size = Integer.parseInt(args[0]);
array = ArrayOfInts.randomizedArray(size);
} catch (NumberFormatException nfe) {//8
try {
array = ArrayOfInts.arrayFromFile(args[0]);
size = array.length;
} catch (Exception e) {
System.err.println(\"unable to read array from \" + args[0]);
System.exit(1);//14
}
}
System.out.println(\"before:\");//15
for (int i = 0; i < array.length; i++) {//2 n
System.out.printf(((i+1) % 10 > 0) ? \" %d\" : \" %d\ \", array[i]);//1
}
int myNum = Order.order(array); //this is the call we want to measure
System.out.println(\"\ after:\");//18
for (int i = 0; i < array.length; i++) {//2 n
System.out.printf(((i+1) % 10 > 0) ? \" %d\" : \" %d\ \", array[i]);
}
System.out.println(myNum);
}
}
ArrayOfInts.java
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.Collections;
import java.util.InputMismatchException;
import java.util.Scanner;
public class ArrayOfInts {
/**
* Returns an array of consecutive ints from 1 to size.
*/
public static int[] orderedArray(int size) {
int[] a = new int[size];
for (int i = 0; i < size; i++) {
a[i] = i+1;
}
return a;
}
/**
* Returns a randomized array containing ints from 1 to size.
*/
public static int[] randomizedArray(int size) {
ArrayList aL = new ArrayList();
for (int i = 0; i < size; i++) {
aL.add(i+1);
}
Collections.shuffle(aL);
int[] a = new int[size];
for (int i = 0; i < size; i++) {
a[i] = aL.get(i);
}
return a;
}
/**
* Writes an int[] to a plain-text file with ints separated by spaces.
* Useful for creating input files for repeatable tests.
*/
public static void arrayToFile(int[] array, String outfile) {
try {
FileWriter fw = new FileWriter(outfile);
BufferedWriter bw = new BufferedWriter(fw);
PrintWriter outFile = new PrintWriter(bw);
for (int i : array) {
outFile.print(i + \" \");
}
outFile.close();
} catch (IOException e) {
System.err.println(\"Could not write to \" + outfile + \"\ \" + e);
}
}
/**
* Read ints from a file and return them in an int[]
*/
public static int[] arrayFromFile(String infile) throws FileNotFoundException,
InputMismatchException {
Scanner scan = new Scanner(new File(infile));
ArrayList aL = new ArrayList();
while (scan.hasNext()) {
aL.add(scan.nextInt());
}
scan.close();
int[] a = new int[aL.size()];
for (int i = 0; i < a.length; i++) {
a[i] = aL.get(i);
}
return a;
}
}
Order.java
public class Order {
/**
* Take an int[] and reorganize it so they are in ascending order.
*/
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Sam wd programs
1. Web
Development
Practical File
Submitted By: Submitted To:
Soumya Subhadarshi Behera Mrs. Chavvi Rana
B.Tech- CSE (5th Semester) Lect. CSE
1826
UIET, MD University
2. INDEX
Sr. No. Date Topis Signature and
Remarks
1. Modulus Operator Description
2. Relational and Logical Operators
3 Do while and For Loop description
4. Parameterized Constructors
5. String Methods
6. Overloading Descriptions
7. Inheritance
8. Animal Interface
9. Exception Handlers
10. Writing inside a file
3. 1. Modulus Operator Description
class Remainder
{
public static void main (String args[])
{
int i = 12;
int j = 4;
int k = 0;
System.out.println("i is " + i);
System.out.println("j is " + j);
k = i % j;
System.out.println("Its Remainder is " + k);
}
}
class Divisor
{
public static void main(String[] args)
{
int a = 10;
int b = 2;
if ( a % b == 0 )
{
System.out.println(a + " is divisible by "+ b);
}
else
{
System.out.println(a + " is not divisible by " + b);
}
}
}
4. 2. Relational and Logical Operators
class RelationalProgram
{
public static void main(String[] args)
{ //a few numbers
int i = 3;
int j = 4;
int k = 4;
System.out.println("Greater than..."); //greater than
System.out.println(" i > j = " + (i > j)); //false
System.out.println(" j > i = " + (j > i)); //true
System.out.println(" k > j = " + (k > j)); //false(equal) //greater than or equal to
System.out.println("Greater than or equal to...");
System.out.println(" i >= j = " + (i >= j)); //false
System.out.println(" j >= i = " + (j >= i)); //true
System.out.println(" k >= j = " + (k >= j)); //true
//less than
System.out.println("Less than...");
System.out.println(" i < j = " + (i < j)); //true
System.out.println(" j < i = " + (j < i)); //false
System.out.println(" k < j = " + (k < j)); //false
//less than or equal to
System.out.println("Less than or equal to...");
System.out.println(" i <= j = " + (i <= j)); //true
System.out.println(" j <= i = " + (j <= i)); //false
System.out.println(" k <= j = " + (k <= j)); //true
//equal to
System.out.println("Equal to...");
System.out.println(" i is equivalent to j = " + (i == j));
System.out.println(" k is equivalent to j = " + (k == j));
//not equal to
System.out.println("Not equal to...");
5. System.out.println(" i not equal to j = " + (i != j)); //true
System.out.println(" k not equal to j = " + (k != j)); //false
}
}
class ConditionalOperator
{
public static void main(String[] args)
{
int x = 2;
int y = 20, result=0;
boolean bl = true;
if((x == 5) && (x < y))
{
System.out.println("value of x is "+ x);
}
if((x == y) || (y > 1))
{
System.out.println("value of y is greater than the value of x");
}
result = bl ? x : y;
System.out.println("The returned value is "+ result);
}
}
6. 3. Do while and For loop presentation
class DoWhile
{
public static void main(String[] args)
{
int count = 1;
do
{
System.out.println("Count is: " + count);
count++;
} while (count < 11);
}
}
class ForLoop
{
public static void main(String[] args)
{
7. for(int i = 1;i <= 10;i++)
{
for(int j = 1;j <= i;j++)
{
System.out.print(i);
}
System.out.println();
}
}
}
4. Parameterized Constructor
class Cube
{
int len;
int bdth;
int ht;
public int getVolume()
{
return (len * bdth * ht);
}
Cube()
{
len = 15;
bdth = 15;
ht = 15;
}
Cube(int l, int b, int h)
{
len = l;
bdth = b;
ht = h;
}
8. public static void main(String[] args)
{
Cube cubeObj1, cubeObj2;
cubeObj1 = new Cube();
cubeObj2 = new Cube(10, 20, 30);
System.out.println("Volume of Cube is : " + cubeObj1.getVolume());
System.out.println("Volume of Cube is : " + cubeObj2.getVolume());
}
}
5. String Methods
import java.lang.*;
class StrStartWith
{
public static void main(String[] args)
{
System.out.println("String start with example!");
String str = "Welcome to my Coding!!!";
String start = "Welcome";
System.out.println("Given String : " + str);
System.out.println("Start with : " + start);
if (str.startsWith(start))
{
System.out.println("The given string is start with Welcome");
}
else
{
System.out.println("The given string is not start with Welcome");
}
}
}
9. import java.lang.*;
import java.io.*;
class StringLength
{
public static void main(String[] args) throws IOException
{
System.out.println("String lenght example!");
BufferedReader bf = new BufferedReader(new InputStreamReader(System.in));
System.out.println("Please enter string:");
String str = bf.readLine();
int len = str.length();
System.out.println("String lenght : " + len);
}
}
import java.lang.*;
class StringTrim
{
public static void main(String[] args)
10. {
System.out.println("String trim example!");
String str = " Hindustan";
System.out.println("Given String :" + str);
System.out.println("After trim :" +str.trim());
}
}
6.Overloading Methods and Constructors
class OverloadDemo
{
void test()
{
System.out.println("No parameters");
}
// Overload test for one integer parameter.
void test(int a)
{
System.out.println("a: " + a);
}
// Overload test for two integer parameters.
void test(int a, int b)
{
System.out.println("a and b: " + a + " " + b);
}
// overload test for a double parameter
double test(double a)
{
System.out.println("double a: " + a);
return a*a;
}
}
class Overload
11. {
public static void main(String args[])
{
OverloadDemo ob = new OverloadDemo();
double result;
// call all versions of test()
ob.test();
ob.test(11);
ob.test(11, 2);
result = ob.test(11.2);
System.out.println("Result of ob.test(11.2): " + result);
}
}
7. Inheritance
class Base
{
int a = 11;
void show()
{
System.out.println(a);
}
}
class Super extends Base
{
int a = 22;
void show()
{
super.show();
System.out.println(a);
}
public static void main(String[] args)
{
new Super().show();
12. }
}
8.executing speak() and eat() methods using animal interface
interface IAnimal
{
public void speak();
}
public class Cat implements IAnimal
{
public void speak()
{
System.out.println("Cat speaks meaown!!!");
}
public static void main(String args[])
{
Cat c = new Cat();
c.speak();
}
}
public class Dog implements IAnimal
{
public void speak()
{
System.out.println("Dog eats Cat!!!");
}
public static void main(String args[])
{
Dog d = new Dog();
d.speak();
}
}
13. 9. Exception handling
import java.io.*;
import java.util.*;
class MyException extends Exception
{
private String ssb="";
public String getMessage(String s)
{
ssb=s;
return ("you are not permitted to enter inside "+ ssb);
}
}
class ExcepDemo
{
public static void main(String args[]) throws MyException,IOException
{
String temp="";
try
{
String str="Soumya Subhadarshi Behera";
System.out.println("Enter your name");
BufferedReader br= new BufferedReader(new InputStreamReader(System.in));
temp=br.readLine();
if(!temp.equals(str))
throw new MyException();
else
System.out.println("Welcome to MDU");
}
catch(MyException e)
{
System.err.println(e.getMessage(temp));
}
14. catch(Exception e)
{
System.err.println(e);
}
}
}
10.Writing inside a file
import java.lang.*;
import java.io.*;
class FileWrite
{
public static void main(String args[])
{
try
{
FileWriter fstream = new FileWriter("KeyboardInput.txt");
BufferedWriter out = new BufferedWriter(fstream);
BufferedReader bf = new BufferedReader(new InputStreamReader(System.in));
System.out.println("Please enter string:");
String str = bf.readLine();
out.write(str);
out.close();
}
catch (Exception e)
{
System.err.println("Error: " + e.getMessage());
}
}
}