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Showing posts with the label Java Program

Quantum Internet Benefits

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  The quantum internet is a network of quantum computers that are connected together using quantum communication. It has the potential to revolutionize many industries, including: Secure communications: The quantum internet would be inherently secure, as it would be impossible to eavesdrop on quantum communications without being detected. This could be used for applications such as secure financial transactions, government communications, and military applications. Quantum computing: The quantum internet would allow quantum computers to be connected together, which would allow them to solve problems that are currently impossible for classical computers. This could be used for applications such as drug discovery, financial modeling, artificial intelligence, and materials science. Quantum sensors: The quantum internet could be used to connect quantum sensors together, which would allow them to create a global network of sensors that could be used to monitor the environment, detect earthq

Jsp / Java Password Encrypt and Decrypt Example

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From Previous post  Now in this post I will use Encryption/ Decryption mechanism on password input password field using AES algorithm , I am just adding UtilsSecure. java class and it has two methods; 1. Encrypt Method encrypt(String strToEncrypt) to encrypt the user given password to cipher text 2. Decrypt Method decrypt(String strToDecrypt) to decrypt the ciper text back to original password content. Below code shows UtilsSecure.java class file package com.ajax.example; import javax.crypto.Cipher; import javax.crypto.spec.SecretKeySpec; import org.apache.commons.cli.CommandLine; import org.apache.commons.cli.CommandLineParser; import org.apache.commons.cli.HelpFormatter; import org.apache.commons.cli.Option; import org.apache.commons.cli.Options; import org.apache.commons.cli.PosixParser; import org.apache.commons.codec.binary.Base64; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; public class UtilsSecure { static Log lo

Java Program: Up casting Program in inheritance

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Program public class upcasting {    public static void main(String[] args)     {      car c,cc,ccc,o;      o=new car();      o.car(); //no casting      c=(car)new ford(); //upcasting ford sub class to super class      c.car();      cc=(car)new benz();//upcasting ford sub class to super class      cc.car();      ccc=(car)new BMW();//upcasting ford sub class to super class            ccc.car();         } } class car {     void car()     {         System.out.println("This super class car method");     } } class ford extends car {     @Override     void car()     {         System.out.println("This sub class Ford car method");     } } class benz extends car {      @Override     void car()     {         System.out.println("This sub class Benz car method");     } } class BMW extends car {      @Override     void car()     {         System.out.println("This sub class BMW car method");     } } Output

Java Program: AWT Frame Closing Event

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Program import java.awt.*; import java.awt.event.*; public class awtexample extends Frame{     public static void main(String[] args)     {         Frame f= new Frame("New Frame");         f.setSize(400, 500);         f.setVisible(true);         f.addWindowListener(new WindowAdapter(){         public void windowClosing(WindowEvent e)         {         System.exit(0);         }      });     } } Output

Java Program: Thread using Runnable interface program

Program import java.util.logging.Level; import java.util.logging.Logger; class ThreadRunnnable {     public static void main(String[] args)     {              new ThreadRun();        new ThreadRunn();        System.out.println("Main Thread Starts");         for(int i=1;i<=5;i++)         {             System.out.println(i);             try {                 Thread.sleep(1500);             } catch (InterruptedException ex) {                 Logger.getLogger(ThreadRun.class.getName()).log(Level.SEVERE, null, ex);             }         }                 } } class ThreadRun implements Runnable {     ThreadRun()     {               Thread t=new Thread();         t.start();         System.out.println("Thread 1");         run();     }     @Override     public void run()     {         for(int i=1;i<=5;i++)         {             System.out.println(i);             try {                 Thread.sleep(500);             } catch (Inter

Java Program: Thread in swing implements Runnable interface and SwingUtilities

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Program import javax.swing.*; public class SwingThread extends JFrame {     public static void main(String[] args) {     SwingUtilities.invokeLater(new Runnable() {       @Override       public void run() {         final JFrame f = new JFrame("Swing using Thread Frame 1");         f.setSize(600, 400);         f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);         f.setVisible(true);               final JFrame fr = new JFrame("Swing using Thread Frame 2");         fr.setSize(600, 600);         fr.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);         fr.setVisible(true);       }     });     }   } Output:

Java Program: Simple Thread Example

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public class threadexample {     public static void main(String args[])     {         Thread t=Thread.currentThread();         System.out.println("Current Thread: "+t);         t.setName("Thread Example");         System.out.println("Current Thread Name changed as: "+t);     } } output

Java Program: Swap two numbers without temp variable

import java.io.*; public class Swapwithouttemp {     public static void main(String[] args) throws IOException     {         System.out.println("Enter first number");         BufferedReader br=new BufferedReader(new InputStreamReader(System.in));         int x=Integer.parseInt(br.readLine());             System.out.println("Enter second number");         BufferedReader brr=new BufferedReader(new InputStreamReader(System.in));         int y=Integer.parseInt(brr.readLine());                 new swap(x,y);     } } class swap {       swap(int a, int b) throws IOException               {         System.out.println("Before swapped values a= "+a+"\tb= "+b );         a=a+b;         b=a-b;         a=a-b;         System.out.println("After swapped values a= "+a+"\tb= "+b );     } }

Java Program: User defined input using BufferedReader, Checking Employee Age

import java.io.*; public class EmployeeAgeCheck {     public static void main(String[] args) throws IOException     {         EmployeeData e=new EmployeeData();         e.getdetails();         e.checkage();           } } class EmployeeData {     private String name;     private int age;     public void getdetails() throws java.io.IOException     {         // user defined input at runtime         BufferedReader buf=new BufferedReader(new InputStreamReader(System.in));         System.out.println("Enter name");         name=buf.readLine();         System.out.println("Enter Age");         age=Integer.parseInt(buf.readLine());     }     public void checkage()     {         if(age<=30)         {             System.out.println(name+ " ,You're Junior Employee");         }         else         {             System.out.println(name+ " ,You're Senior Employee");         }     } }

Java Program : Default and Parameterized Constructor

public class constructorexample {     public static void main(String[] args)     {         personcon kumaran=new personcon();         kumaran.display();         personcon jannu=new personcon("Jannu",22);         jannu.display();     } } class personcon {     private String name;     private int age;     //default constructor     personcon()     {         name="kumaran";         age=23;     }    //parameterized constructor     personcon(String n,int a)               {         name=n;         age=a;     }     public void display()     {         System.out.println("Name: "+name+"\t Age: "+age);     } }