studentframe.java

java的事件处理例子

/**
 *　多屏幕事件控制
 */
import java.awt.Toolkit;
import java.awt.Image;
import java.awt.Dimension;
import java.awt.Container;
import java.awt.Color;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JButton;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

public class StudentFrame
{
	public static void main(String[] args)
	{
		OpenFrame frame = new OpenFrame();
		//主窗口屏幕关闭时，系统退出
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		frame.show();
	} 
}

/**
 *　这是定制自己的按钮框架
 */
class OpenFrame extends JFrame
{
	private static final int WIDTH = 400;
	private static final int HEIGHT = 300;
	
	public OpenFrame()
	{
		Container con = getContentPane();//得到了内容窗格
		
		Toolkit kit = Toolkit.getDefaultToolkit();
		Dimension screenSize = kit.getScreenSize();
		int width = screenSize.width;
		int height = screenSize.height;
		int x = (width - WIDTH)/2;
		int y = (height - HEIGHT)/2;
		setLocation(x, y);//设置坐标起点
		setSize(WIDTH, HEIGHT);//设置框架的大小
		Image image = kit.getImage("duke.gif");// duke.gif为图像文件名
		setIconImage(image);//设置框架图标
		setTitle("学生管理系统主窗口");//设置框架的标题
		setResizable(false);//设置用户不可以改变框架的大小
		
		OpenButtonPanel panel = new OpenButtonPanel(this);//得到定制的面板
		con.add(panel);//将面板添加到内容窗格中
	}
}

/**
 *　这是继承了JPanel面板类
 */
class OpenButtonPanel extends JPanel
{
	private JButton makeNewFrameButton;
	private JFrame parFrame;
			
	public OpenButtonPanel(JFrame frame)
	{
		parFrame = frame;
		//生成创建新窗口的按钮
		makeNewFrameButton = new JButton("Open New Frame");		
		
		//将按钮添加到面板中
		add(makeNewFrameButton);
		
		//向按钮注册监听器
		makeNewFrameButton.addActionListener(new MakeNewFrameAction());
	}
	
	//监听器类
	private class MakeNewFrameAction implements ActionListener
	{
		//当产生某个动作时，会自动调用该方法，实现背景色的设定
		public void actionPerformed(ActionEvent event)
		{
			JFrame subFrame = new CloseFrame(parFrame);//生成新的窗口实例
			subFrame.show();
			subFrame.addWindowListener(new WindowAdapter()
					{
						public void windowClosing(WindowEvent e)
						{
							if(!parFrame.isShowing());
							parFrame.show();
						}
					});
			parFrame.hide();
		}
	}
}

/**
 *　学生管理系统第二个页面
 */
class CloseFrame extends JFrame
{
	private static final int WIDTH = 400;
	private static final int HEIGHT = 300;
	private JFrame parFrame;
	
	public CloseFrame(JFrame frame)
	{
		parFrame = frame;
		Container con = getContentPane();//得到了内容窗格
		
		setSize(WIDTH, HEIGHT);//设置框架的大小
		setTitle("学生管理系统第二个页面");//设置框架的标题
		setResizable(false);//设置用户不可以改变框架的大小
		
		CloseButtonPanel panel = new CloseButtonPanel(this);//得到定制的面板
		con.add(panel);//
	}
	
	class CloseButtonPanel extends JPanel
	{
		public CloseButtonPanel(JFrame subFrame)
		{
			JButton closeNewFrameButton = new JButton("Close New Frame");
			add(closeNewFrameButton);
			closeNewFrameButton.addActionListener(new CloseNewFrameAction(subFrame));
			setBackground(Color.green);
		}	
	}
	
	class CloseNewFrameAction implements ActionListener
	{
		private JFrame subFrame;
		
		public CloseNewFrameAction(JFrame subFrame)
		{
			this.subFrame = subFrame;
		}
		public void actionPerformed(ActionEvent e)
		{
			subFrame.hide();
			parFrame.show();
		}
	}
}