mouseeventapplet.java

不错的课件陈述设计一个汇编程序。实现下列功能1.实现加、减、乘、除以及取余的计算程序。2.接受由键盘输入的十进制数。3.计算结果以十进制数输出。

import java.awt.*;
import java.awt.event.*;
import java.applet.*;
import javax.swing.*;

public class MouseEventApplet extends JApplet  {

  JPanel jPanel1 = new JPanel();
  JPanel jPanel2 = new JPanel();
   JPanel jPanel3 = new JPanel();
	
  JButton jButton1 = new JButton();
  JButton jButton2 = new JButton();
  JButton jButton3 = new JButton();
  JButton jButton4 = new JButton();

  JLabel jLabel1 = new JLabel();
  JTextField jTextField1 = new JTextField();
  JLabel jLabel2 = new JLabel();
  JTextField jTextField2 = new JTextField();
	
   GridLayout gridLayout1 = new GridLayout();
 
  JTextArea jTextArea1 = new JTextArea();
  BorderLayout borderLayout1 = new BorderLayout(10,10);


  public void init() {
    try  {
    myInit();
    }
    catch(Exception e)  {
      e.printStackTrace();
    }
  }

  private void myInit() throws Exception {
    this.setSize(new Dimension(350, 300));
    this.getContentPane().setLayout(new BorderLayout(10,10));
    jButton1.setText("jButton1");
    jButton2.setText("jButton2");
    jButton3.setText("jButton3");
    jButton4.setText("jButton4");
   
    jLabel1.setText("X轴");
    jTextField1.setPreferredSize(new Dimension(50, 25));
    jLabel2.setText("Y轴");   
    jTextField2.setPreferredSize(new Dimension(50, 25));
	
    gridLayout1.setColumns(1);
    gridLayout1.setHgap(5);
    gridLayout1.setRows(4);
    gridLayout1.setVgap(5);
	    
    jPanel1.setLayout(gridLayout1);
    jPanel1.add(jButton1, null);
    jPanel1.add(jButton2, null);
    jPanel1.add(jButton3, null);
    jPanel1.add(jButton4, null);
    this.getContentPane().add(jPanel1, BorderLayout.WEST);

    jPanel2.setLayout(new FlowLayout());
    jPanel2.add(jLabel1, null);
    jPanel2.add(jTextField1, null);
    jPanel2.add(jLabel2, null);
    jPanel2.add(jTextField2, null);
    this.getContentPane().add(jPanel2, BorderLayout.SOUTH);
		
    jPanel3.setLayout(borderLayout1);
    this.getContentPane().add(jPanel3, BorderLayout.CENTER);
    jTextArea1.setColumns(20);
    JScrollPane jsp=new JScrollPane(jTextArea1);//制作一scrollpane以承装textarea
    jPanel3.add(jsp, BorderLayout.CENTER);
    JLabel jLabel3=new JLabel("事件发生显示区");
    JPanel jPanel4=new JPanel();
	jPanel4.add(jLabel3);
    jPanel3.add(jPanel4, BorderLayout.NORTH);

    //老鼠事件倾听
    jButton1.addMouseListener(new ButtonMouseListener(this));
    jButton1.addMouseMotionListener(new ButtonMouseMotionListener(this));
    jButton2.addMouseListener(new ButtonMouseListener(this));
    jButton2.addMouseMotionListener(new ButtonMouseMotionListener(this));
    jButton3.addMouseListener(new ButtonMouseListener(this));
    jButton3.addMouseMotionListener(new ButtonMouseMotionListener(this));
    jButton4.addMouseListener(new ButtonMouseListener(this));
    jButton4.addMouseMotionListener(new ButtonMouseMotionListener(this));
  }


class ButtonMouseListener implements MouseListener {
	
  public MouseEventApplet japplet=new MouseEventApplet() ;
  public JButton source=new JButton();
	public ButtonMouseListener(MouseEventApplet japplet1){
	this.japplet=japplet1;
	}

    public void mouseEntered(MouseEvent event) {
      source=(JButton)event.getSource();
      japplet.jTextArea1 .append ("进入"+source.getActionCommand()+"\n");  
	if (source.getActionCommand()=="jButton1"){setCursor(Cursor.getPredefinedCursor(Cursor.HAND_CURSOR));}
	if (source.getActionCommand()=="jButton2"){setCursor(Cursor.getPredefinedCursor(Cursor.CROSSHAIR_CURSOR));}
	if (source.getActionCommand()=="jButton3"){setCursor(Cursor.getPredefinedCursor(Cursor.WAIT_CURSOR));}
	if (source.getActionCommand()=="jButton4"){setCursor(Cursor.getPredefinedCursor(Cursor.MOVE_CURSOR));}     
    }
    public void mouseExited(MouseEvent event) {
	 JButton source=(JButton)event.getSource();
	japplet.jTextArea1 .append ("离开"+source.getActionCommand()+"\n");
	japplet.jTextField1.setText("");
	japplet.jTextField2.setText("");
	setCursor(Cursor.getPredefinedCursor(Cursor.DEFAULT_CURSOR));
       
    }
    public void mousePressed (MouseEvent event) {
     JButton source=(JButton)event.getSource();
    japplet.jTextArea1 .append ("在"+source.getActionCommand()+"上将老鼠压下去\n");}
	
    public void mouseClicked (MouseEvent event) {
     JButton source=(JButton)event.getSource();
    japplet.jTextArea1 .append ("在"+source.getActionCommand()+"上将老鼠敲一下\n"); }
	
    public void mouseReleased(MouseEvent event) {
    JButton source=(JButton)event.getSource();
    japplet.jTextArea1 .append ("在"+source.getActionCommand()+"上的老鼠被释放了!\n");}
 }



  class ButtonMouseMotionListener implements MouseMotionListener {
    public MouseEventApplet japplet=new MouseEventApplet() ;
	public ButtonMouseMotionListener(MouseEventApplet japplet1){
	this.japplet=japplet1;
	}
	
	public void mouseDragged(MouseEvent event){
	}
	public void mouseMoved(MouseEvent event){
	japplet.jTextField1.setText(Integer.toString(event.getX()));
	japplet.jTextField2.setText(Integer.toString(event.getY()));	
	}
	
}		
		
		
		
}