buttongroups.java

简单的Java Gui,用Java编辑器真接打开

//: c13:ButtonGroups.java
// Uses reflection to creats groups
// of different types of AbstractButton.
// <applet code=ButtonGrups
// width=500 height=300></applet>

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.border.*;
import java.lang.reflect.*;
import com.bruceeckel.swing.*;

public class ButtonGroups extends JApplet
{
	static String[] ids = {
		"June", "Ward", "Beaver", 
		"Wally", "Eddie", "Lumpy"
		}; 
	static JPanel makeBPanel(Class bClass, String[] ids)
	{
		ButtonGroup bg = new ButtonGroup();
		JPanel jp = new JPanel();
		String title = bClass.getName();
		
		title = title.substring(title.lastIndexOf('.') + 1);
		
		jp.setBorder(new TitledBorder(title));
		
		for (int i=0; i<ids.length; i++)
		{
			AbstractButton ab = new JButton("failed");
			
			try
			{
				// Get the dynamic constructor method
				// that takes a String argument;
				Constructor ctor = bClass.getConstructor(
						new Class[] {String.class});
						
				//Create a new object;
				ab = (AbstractButton)ctor.newInstance(
						new Object[] {ids[i]});
			}
			catch(Exception ex)
			{
				System.err.println("can't creat " + bClass);
			}
			
			bg.add(ab);
			jp.add(ab);
		}
		
		return jp;
	}
	
	public void init()
	{
		Container cp = getContentPane();
		
		cp.setLayout(new FlowLayout());
		cp.add(makeBPanel(JButton.class, ids));
		cp.add(makeBPanel(JToggleButton.class, ids));
		cp.add(makeBPanel(JCheckBox.class, ids));
		cp.add(makeBPanel(JRadioButton.class, ids));
	}
	
	public static void main(String[] args)
	{
		Console.run(new ButtonGroups(), 500, 300);
	}
}///:~