checkboxes.java

来自「简单的Java Gui,用Java编辑器真接打开」· Java 代码 · 共 74 行

//: c13:CheckBoxes.java
// Using JCheckBoxes.
// <applet code=CheckBoxes width=200 height=200>
// </applet>

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

public class CheckBoxes extends JApplet
{
	JTextArea t = new JTextArea(6, 15);
	JCheckBox cb1 = new JCheckBox("Check Box 1");
	JCheckBox cb2 = new JCheckBox("Check Box 2");
	JCheckBox cb3 = new JCheckBox("Check Box 3");
		
	public void init()
	{
		cb1.addActionListener(new ActionListener() 
		{
			public void actionPerformed(ActionEvent e)
			{
				trace("1", cb1);
			}
		});
		
		cb2.addActionListener(new ActionListener()
		{
			public void actionPerformed(ActionEvent e)
			{
				trace("2", cb2);
			}
		});
		
		cb3.addActionListener(new ActionListener()
		{
			public void actionPerformed(ActionEvent e)
			{
				trace("3", cb3);
			}
		});
		
		Container cp = getContentPane();
		cp.setLayout(new FlowLayout());
		cp.add(new JScrollPane(t));
		cp.add(cb1);
		cp.add(cb2);
		cp.add(cb3);
	}
	
	void trace(String b, JCheckBox cb)
	{
		if (cb.isSelected())
		{
			t.append("Box " + b + " Set\n");
		}
		else
		{
			t.append("Box " + b + " Cleared\n");
		}
	}
	
	public static void main(String[] args)
	{
		CheckBoxes applet = new CheckBoxes();
		JFrame frame = new JFrame("CheckBoxes");
		frame.getContentPane().add(applet);
		frame.setSize(200, 100);
		applet.init();
		applet.start();
		frame.setVisible(true);
	}
}///:~