swingbutton.java

java程序设计 清华出版社 孙燮华老师编写的程序源代码

//swingButton.java 
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

public class swingButton extends Frame implements ActionListener{
  TextField text;
  JButton button,exitbutton;

  public swingButton(){
    setLayout(new FlowLayout());
    ImageIcon buttonIcon=new ImageIcon("copy.gif");
    button=new JButton("Click Me",buttonIcon);
    button.setVerticalTextPosition(AbstractButton.CENTER);
    button.setHorizontalTextPosition(AbstractButton.LEFT);
    exitbutton=new JButton("Exit");
    button.addActionListener(this);
    exitbutton.addActionListener(this);
    text=new TextField(20);
    add(button);
    add(exitbutton);
    add(text);
    setSize(220,120);
    setVisible(true);
  }

  public void actionPerformed(java.awt.event.ActionEvent e){
    if(e.getSource()==button){
      text.setText("Button pressed.");
    }
    else if(e.getSource()==exitbutton){
      System.exit(0);
    }
  }
  public static void main(String args[]){
    swingButton myButton=new swingButton();
  }
}