example5_2.java

一些JAVA初学应用的代码

package calculatorExample;

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

public class Example5_2 extends Applet implements ActionListener,MouseListener{
  private Button But;
  String str;
  String mouseClickCnt="单击";
  Dimension currentPos=new Dimension();
  int clickCnt=0;
  public void init(){
    But=new Button("按钮");
    setLayout(new FlowLayout());
    add(But);
    But.addActionListener(this);
    But.addMouseListener(this);
    addMouseListener(this);
  }
  public void paint(Graphics g){
    str=new String("单击了"+clickCnt+"次按钮");
    g.drawString(str,10,40);
    g.drawString("鼠标"+mouseClickCnt+"位置：（"+currentPos.width+","
                 +currentPos.height+")",10,70);
  }
  public void actionPerformed(ActionEvent e){
    if(e.getSource()==But){
      clickCnt++;
      repaint();
    }
  }
  public void mouseClicked(MouseEvent e){
    currentPos.width=e.getX();
    currentPos.height=e.getY();
    if(e.getClickCount()==1)
      mouseClickCnt="单击";
      else
        mouseClickCnt="双击";
        repaint();
  }
  public void mousePressed(MouseEvent e){

  }
  public void mouseReleased(MouseEvent e){

  }
  public void mouseEntered(MouseEvent e){

  }
  public void mouseExited(MouseEvent e){

  }

}