test.java

来自「《Java2图形设计卷II：Swing》配套光盘源码」· Java 代码 · 共 44 行

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

public class Test extends JApplet {
	Icon icon = new ImageIcon("icon.gif");
	JButton button = new JButton("button");

	public Test() {
		Container contentPane = getContentPane();

		button.setRolloverIcon(new ImageIcon("punch.gif"));
		button.setIcon(new ImageIcon("open_hand.gif"));

		contentPane.setLayout(new FlowLayout());
		contentPane.add(button);

		button.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				System.out.println("action!");
			}
		});
		button.addChangeListener(new ChangeListener() {
			public void stateChanged(ChangeEvent e) {
				System.out.println(getButtonState());
			}
		});
	}
	private String getButtonState() {
		ButtonModel model = button.getModel();
		String state = "Button State: "; 

		state += model.isSelected() ? "selected" : "deselected";
		state += model.isPressed() ? ", pressed" : 
									 ", not pressed";
		state += model.isArmed() ? ", armed" : ", disarmed";
		state += model.isRollover() ? ", rollover" : 
									  ", not rollover";

		return state;
	}
}