Kumaran1987

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 { ...

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 { ...

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

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 imp...

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:

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

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;     ...

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()     {   ...

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);     } ...