jbuttondemo.java

java课程的资料以及实验的代码

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class JButtonDemo extends JFrame implements ActionListener{
  JTextField jtf;
  public JButtonDemo () {
    Container contentPane = getContentPane();
    contentPane.setLayout(new FlowLayout());

   //添加按钮，并且设置按钮的操作事件
		ImageIcon b1 = new ImageIcon("warning.gif");
    JButton jb = new JButton(b1);
    jb.setActionCommand("按钮按下");
    jb.addActionListener(this);
    contentPane.add(jb);

    jtf = new JTextField(15);
    contentPane.add(jtf);
 	}
 	
  public void actionPerformed(ActionEvent ae) {
    jtf.setText(ae.getActionCommand());
  }
  public static void main(String []args)
  {
  	JButtonDemo jbd=new JButtonDemo();
  	jbd.setSize(300,100);
  	jbd.setVisible(true);
  }
}