keyeventdemo.java

里面所含源码是本人平时做程序的一些实例

import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
public class KeyEventDemo implements ActionListener,KeyListener
{
	JFrame frmMain;
	JLabel lblInfo,lblTest,lblEvent;
	JTextField txtTest,txtInfo;
	JButton btnClear=null;
	String strKey="";
	public KeyEventDemo()
	{
		frmMain=new JFrame("键盘事件演示");
		Container conPane=frmMain.getContentPane();
		conPane.setLayout(new GridLayout(3,2));
		lblInfo=new JLabel("输入的字符");
		txtInfo=new JTextField();
		txtInfo.setBackground(Color.CYAN);
		txtInfo.enable(false);
		lblTest=new JLabel("请输入字符");
		txtTest=new JTextField();
		txtTest.requestFocus();
		txtTest.addKeyListener(this);
		lblEvent=new JLabel();
		btnClear=new JButton("清除(C)");
		btnClear.setMnemonic('C');
		btnClear.addActionListener(this);
		conPane.add(lblTest);
		conPane.add(txtTest);
		conPane.add(lblInfo);
		conPane.add(txtInfo);
		conPane.add(lblEvent);
		conPane.add(btnClear);
		frmMain.setSize(250,150);
		frmMain.show();
		
	}
	public void actionPerformed(ActionEvent e)
	{
		strKey="";
		txtInfo.setText("");
		txtTest.setText("");
		txtTest.requestFocus();
	}
	public void keyTyped(KeyEvent e)
	{
		char c=e.getKeyChar();
		if(c=='o')
		{
			JFrame newf=new JFrame("新窗口");
			newf.setSize(200,200);
			//newf.setVisible(true);
			newf.show();
		}
		strKey=strKey+c;
		txtInfo.setText(strKey);
		lblEvent.setText("产生keyTyped!");
		
	}
	public void keyPressed(KeyEvent e)
	{
		lblEvent.setText("产生keyPressed");
	}
	public void keyReleased(KeyEvent e)
	{
		lblEvent.setText("产生keyReleased");
	}
	public static void main(String args[])
	{
		new KeyEventDemo();
	}
}