actevent.java

GUI事件处理例子

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

public class ActEvent extends Frame implements ActionListener {

	static ActEvent frm = new ActEvent();
	static Button btn1, btn2;
	static Label lbl;

	public static void main(String args[]) {
		frm.setTitle("ActionEvent");
		frm.setSize(240, 160);
		frm.setLayout(new FlowLayout());
		btn1 = new Button(" button  1 ");
		btn2 = new Button(" button  2 ");
		lbl = new Label("  no   clicking  ");
		btn1.addActionListener(frm);
		btn2.addActionListener(frm);
		frm.add(btn1);
		frm.add(btn2);
		frm.add(lbl);
		frm.setVisible(true);
	}

	public void actionPerformed(ActionEvent e) {
		if (e.getSource() == btn1)
			lbl.setText("button 1 clicked");
		else
			lbl.setText("button 2 clicked");
	}
}