1.public class Test extends Test1

{

     public int test(String str, Integer x)

     {

          String test1 = "(String, Integer[])";

          System.out.println("Override: " + str + " " +

          test1);

          return 0;

      }

      public static void main(String args)

      {

          Test1 sb = new Test();

          sb.test("test", 3);

      }

}

2.

import java.awt.event.WindowAdapter;

import java.awt.event.WindowEvent;

import javax.swing.JFrame;

import javax.swing.JLabel;

import javax.swing.JPanel;

 

public class JPanelTest extends JPanel {

         public static void main(String[] args) {

 

                   JFrame frame = new JFrame("Test");

                   JLabel jl = new JLabel("Exit");

 

                   frame.getContentPane().add(jl);

                   frame.setSize(200, 90);

                   frame.addWindowListener(new WinEvent());

         }

}

 

class WinEvent extends WindowAdapter {

         public void windowClosing(WindowEvent e) {

                   System.exit(0);

         }

}

3.

package com.apkway;

 

abstract class TestAbstract

{

         public int test() { return 0; }

}

class Test extends TestAbstract

{

         public int test() { return 60; }

}

class Test1 extends Test1

{

      public int test() { return 150; }

      public static void main (String[] args)

      {

          Test1 test1 = new Test1();

          Test1 test = new Test1();

          TestAbstract testAbs= new Test1();

 

         System.out.println(test1.test()+ ", "+ test.test()+ ", "+ testAbs.test());

      }

}

4.

import java.awt.event.WindowAdapter;

import java.awt.event.WindowEvent;

 

import javax.swing.JFrame;

import javax.swing.JLabel;

import javax.swing.JPanel;

 

public class JPanelTest extends JPanel {

         public static void main(String[] args) {

 

                   JFrame frame = new JFrame("Test");

                   JLabel jl = new JLabel("Exit");

 

                   frame.getContentPane().add(jl);

                   frame.setSize(200, 90);

                   frame.addWindowListener(new WinEvent());

         }

}

 

class WinEvent extends WindowAdapter {

         public void windowClosing(WindowEvent e) {

                   System.exit(0);

         }

}