实验十一 图形化界面

package 实验包;

import java.awt.*;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import javax.swing.*;

 public class Example1 extends JFrame{  

 public Example1(){   

 JFrame jf=new JFrame();  

  Container container=jf.getContentPane();   

 container.setLayout(null);    

jf.setVisible(true);   

 jf.setSize(320,300);    

JButton button1=new JButton("+");   

 JButton button2=new JButton("-");   

 JButton button3=new JButton("*");  

  JButton button4=new JButton("/");

   JTextField text1=new JTextField();   

 JTextField text2=new JTextField();    

button1.setBounds(0,200,75,50);   

 button2.setBounds(75,200,75,50);  

  button3.setBounds(150,200,75,50);

   button4.setBounds(225,200,75,50);

   container.add(button1);  

  container.add(button2);   

 container.add(button3);  

  container.add(button4);   

 text1.setBounds(0,0,300,100);   

 text2.setBounds(0,100,300,100);    

container.add(text1);   

 container.add(text2);  

  button1.addActionListener(new ActionListener(){    

 public void actionPerformed(ActionEvent e){    

  String x1=text1.getText();      

String x2=text2.getText();     

 double y1=Double.parseDouble(x1);     

 double y2=Double.parseDouble(x2);      

double z=y1+y2;      

text1.setText(z+"");     

}   

 });   

 button2.addActionListener(new ActionListener(){     

public void actionPerformed(ActionEvent e){    

  String x1=text1.getText();

     String x2=text2.getText();  

    double y1=Double.parseDouble(x1);      

double y2=Double.parseDouble(x2);   

   double z=y1-y2;    

  text1.setText(z+"");    

 }   

 });   

 button3.addActionListener(new ActionListener(){    

 public void actionPerformed(ActionEvent e){   

   String x1=text1.getText();    

  String x2=text2.getText();      

double y1=Double.parseDouble(x1);    

  double y2=Double.parseDouble(x2);   

   double z=y1*y2;    

  text1.setText(z+"");   

  }   

 });   

 button4.addActionListener(new ActionListener(){

    public void actionPerformed(ActionEvent e){    

  String x1=text1.getText();     

 String x2=text2.getText();      

double y1=Double.parseDouble(x1);   

   double y2=Double.parseDouble(x2);   

   double z=y1/y2;   

   text1.setText(z+"");    

 }   

 });  

 }

 public static void main(String[] args) {

  new Example1();

 } }