实验十一

   package 实验11;
   
  import java.awt.*;
  import javax.swing.*;
  import java.awt.event.*; 
  public class Jisuanqi extends Frame implements ActionListener{
  public Jisuanqi() {
 super("计算器");
 Frame ff=new Frame("framework test");
 ff.setSize(400,100);
 ff.setLocation(300,240);
 ff.setLayout(new FlowLayout());
 final TextField f1=new TextField("10",8);
 ff.add(f1); 
 //this.add(new Label("+"));
 Label l1=new Label("+");
 ff.add(l1);
 //this.add(new TextField("20",8));
 TextField f2=new TextField("20",8);
 ff.add(f2);
 //this.add(new Button("="));
 Button b1=new Button("=");
 ff.add(b1);
 //this.add(new TextField(10));
 TextField f3=new TextField(10);
 ff.add(f3);
 ff.addWindowListener(new myclose());
 ff.setVisible(true);
 b1.addActionListener(new ActionListener()
 {public void actionPerformed(ActionEvent e)
 {double c;
 String s1=f1.getText();
 double a=Integer.parseInt(s1);
 String s2=f2.getText();
 double b=Integer.parseInt(s2);
 c=a+b;
 String m=String.valueOf(c);
 f3.setText(m); 
  }
  
 private double Integer(String s) {
 return 0;
 }
 }); 
 }

 class myclose implements WindowListener{
 
 public void windowActivated(WindowEvent arg0) {
  
 }
  
 public void windowClosed(WindowEvent arg0) {
 // TODO Auto-generated method stub
 }
 
 public void windowClosing(WindowEvent arg0) {
 
 System.exit(0);
 }
 
 public void windowDeactivated(WindowEvent arg0) {
  
 }
 
 public void windowDeiconified(WindowEvent arg0) {
 }
 
public void windowIconified(WindowEvent arg0) {
  

}
  public void windowOpened(WindowEvent arg0) {
 
 }
 
 }
  
   

public static void main(String[] args) { 
 new Jisuanqi();
 }
 

public void actionPerformed(ActionEvent arg0) {
 
}
  
}

实验结果：

实验心得：通过本次实验了解了图形界面的构成以及事件的监听，本次实验难度较大，是在韵锦的帮助下完成的。