练手java GUI(七)

最新推荐文章于 2023-07-03 20:20:35 发布

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本文提供了一个使用Java AWT库中CardLayout布局管理器的示例程序。该程序通过按钮控制不同卡片之间的切换，演示了CardLayout的基本用法。

一个CardLayout的例子：

package gui.test10;

import java.awt.BorderLayout;
import java.awt.Button;
import java.awt.CardLayout;
import java.awt.Frame;
import java.awt.GridLayout;
import java.awt.Panel;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

/**
 * 取消布局管理器:
 * container.setLayout(null);
 * 采用绝对定位：setBounds(....)
 * 
 * @author junlas
 *
 */
public class TestCardLayout extends Frame {
	private CardLayout cl = new CardLayout();
	//
	Panel plCenter = new Panel();

	public TestCardLayout() {
		Panel plWest = new Panel();
		plWest.setLayout(new GridLayout(3, 1));
		Button btnPrev = new Button("prev");
		Button btnNext = new Button("next");
		Button btnThree = new Button("three");
		plWest.add(btnPrev);
		plWest.add(btnNext);
		plWest.add(btnThree);
		plCenter.setLayout(cl);
		plCenter.add(new Button("one"),"1");
		plCenter.add(new Button("two"),"2");
		plCenter.add(new Button("three"),"3");
		plCenter.add(new Button("four"),"4");
		plCenter.add(new Button("five"),"5");
		
		myActionListener ma = new myActionListener();
		btnPrev.addActionListener(ma);
		btnNext.addActionListener(ma);
		btnThree.addActionListener(ma);
		
		//
		add(plWest,BorderLayout.WEST);
		add(plCenter);
		
		//
		addWindowListener(new WindowAdapter() {

			@Override
			public void windowClosing(WindowEvent e) {
				dispose();
				System.exit(0);
			}
			
		});
	}
	
	private class myActionListener implements ActionListener{

		@Override
		public void actionPerformed(ActionEvent e) {
			if(e.getActionCommand().equals("prev")){
				cl.previous(plCenter);
			}else if(e.getActionCommand().equals("next")){
				cl.next(plCenter);
			}else{
				cl.show(plCenter, "3");
			}
		}
		
	}
	
	
	public static void main(String[] args) {
		TestCardLayout mainFrame = new TestCardLayout();
		mainFrame.setSize(400, 400);
		mainFrame.setTitle("TestCardLayout");
		mainFrame.setVisible(true);
	}
}