键盘监听-优快云博客

博客展示了 Java 代码，导入了 java.awt 和 java.awt.event 相关包，定义了 MouseAndKeyEvent 类，包含 Frame、Button 和 TextField 等成员变量，体现了 Java 在处理鼠标与键盘事件方面的应用。

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import java.awt.;
import java.awt.event.;

class MouseAndKeyEvent
{
private Frame f;
private Button but;
private TextField tf;

MouseAndKeyEvent()
{
	init();
}

public void init()
{
	f = new Frame("my frame");

	f.setBounds(300,100,600,500);
	f.setLayout(new FlowLayout());

	tf = new TextField(20);

	but = new Button("my button");


	
	f.add(tf);
	f.add(but);


	myEvent();

	f.setVisible(true);

}
private void myEvent()
{
	f.addWindowListener(new WindowAdapter()
	{
		public void windowClosing(WindowEvent e)
		{
			System.exit(0);
		}
	});


	tf.addKeyListener(new KeyAdapter()
	{
		public void keyPressed(KeyEvent e)
		{
			int code = e.getKeyCode();
			if(!(code>=KeyEvent.VK_0 && code<=KeyEvent.VK_9))
			{
				System.out.println(code+".....是非法的");
				e.consume();
			}


		}
	});

	//给But添加一个键盘监听。
	but.addKeyListener(new KeyAdapter()
	{
		public void keyPressed(KeyEvent e)
		{	
			if(e.isControlDown()&&e.getKeyCode()==KeyEvent.VK_ENTER)
				//System.exit(0);
			System.out.println("ctrl+enter is run");

			//System.out.println(KeyEvent.getKeyText(e.getKeyCode())+"...."+e.getKeyCode());
		}
	});



	/*
	but.addActionListener(new ActionListener()
	{
		public void actionPerformed(ActionEvent e)
		{
			System.out.println("action ok");
		}
	});
	*/

	/*

	but.addMouseListener(new MouseAdapter()
	{
		private int count = 1;
		private int clickCount = 1;
		public void mouseEntered(MouseEvent e) 
		{
			System.out.println("鼠标进入到该组件"+count++);
		}
		public void mouseClicked(MouseEvent e)
		{
			if(e.getClickCount()==2)
				System.out.println("双击动作"+clickCount++);
		}
	});
	*/
}






public static void main(String[] args) 
{
	new MouseAndKeyEvent();
}

}