JavaList

package JavaList;
import java.awt.*;
import javax.swing.*;
import javax.swing.event.*;

public class JavaList extends JFrame{
    private JList list;
    private static String [] colornames = {"Black","Blue","Red","White"};
    private static Color[] color = {Color.BLACK,Color.BLUE,Color.RED,Color.WHITE};
    public JavaList(){
        super("List");
        setLayout(new FlowLayout());
        list = new JList(colornames);
        list.setVisibleRowCount(4);
        list.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
        add(new JScrollPane(list));
        list.addListSelectionListener(
                new ListSelectionListener(){
                    public void valueChanged(ListSelectionEvent event){
                        getContentPane().setBackground(color[list.getSelectedIndex()]);
                }
            }
        );
    }

}
============================================================================================
JavaList TEst


package JavaList;
import javax.swing.JFrame;

public class JavaListTest {
    public static void main(String[] args){
        JavaList myJavaList = new JavaList();
        myJavaList.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        myJavaList.setSize(300,120);
        myJavaList.setVisible(true);
    }

}

============================================================================================
JavaMouse Event

package JavaMouseEvent;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class JavaMouseEvent extends JFrame{
    private JPanel mousePanel;
    private JLabel statusbar;
    public JavaMouseEvent(){
        super("Java Mouse");
        mousePanel = new JPanel();
        mousePanel.setBackground(Color.WHITE);
        add(mousePanel,BorderLayout.CENTER);
        statusbar = new JLabel("default");
        add(statusbar,BorderLayout.SOUTH);
        HandlerClass handler = new HandlerClass();
        mousePanel.addMouseListener(handler);
        mousePanel.addMouseMotionListener(handler);
    }
    private class HandlerClass implements MouseListener, MouseMotionListener{
        public void mouseClicked(MouseEvent event){
            statusbar.setText(String.format("Clicked at %d, %d", event.getX(), event.getY()));
        }
        public void mousePressed(MouseEvent event){
            statusbar.setText("You pressed mouse down");

        }
        public void mouseReleased(MouseEvent event){
            statusbar.setText("You released the button");

        }
        public void mouseEntered(MouseEvent event){
            statusbar.setText("You entered the area");
            mousePanel.setBackground(Color.RED);
        }
        public void mouseExited(MouseEvent event){
            statusbar.setText("You left tht area");
            mousePanel.setBackground(Color.WHITE);
        }
        //mouse motion event
        public void mouseDragged(MouseEvent event){
            statusbar.setText("You are dragging the mouse");

        }
        public void mouseMoved(MouseEvent event){
            statusbar.setText("You move the mouse");

        }
    }

}
========================================================================================
JavaMouseEventTest

package JavaMouseEvent;
import javax.swing.JFrame;



public class JavaMouseEventTest {
    public static void main(String[] args){
        JavaMouseEvent myJavaMouse = new JavaMouseEvent();
        myJavaMouse.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        myJavaMouse.setSize(300,120);
        myJavaMouse.setVisible(true);
    }

}