用户lucky-题目2的代码-键盘监听事件、swing界面

我会带着你远行 2023-02-22 05:06 8阅读 0赞

package com.han;
    
    import java.awt.Container;
    import java.awt.event.KeyEvent;
    import java.awt.event.KeyListener;
    
    import javax.swing.JFrame;
    import javax.swing.JLabel;
    import javax.swing.JScrollPane;
    import javax.swing.JTextArea;
    import javax.swing.SpringLayout;
    
    /**
     * 键盘事件监听(1)
     * @author HAN
     *
     */
    public class KeyEvent_1 extends JFrame {
    	String string="";//储存字母
    	private int i=0;
    	private String stringfiveString="";
    	/**
    	 * 
    	 */
    	private static final long serialVersionUID = -6762512303624322086L;
    
    	public KeyEvent_1() {
    		// TODO Auto-generated constructor stub
    		Container container = getContentPane();
    		SpringLayout springLayout = new SpringLayout();
    		container.setLayout(springLayout);
    		JLabel remarqueLabel = new JLabel("");
    		JTextArea textArea = new JTextArea(3, 30);
    		JScrollPane scrollPane = new JScrollPane();
    		scrollPane.setViewportView(textArea);
    		container.add(remarqueLabel);
    		springLayout.putConstraint(SpringLayout.WEST, remarqueLabel, 5,
    				SpringLayout.WEST, container);
    		springLayout.putConstraint(SpringLayout.NORTH, remarqueLabel, 5,
    				SpringLayout.NORTH, container);
    		container.add(scrollPane);
    		springLayout.putConstraint(SpringLayout.WEST, scrollPane, 5,
    				SpringLayout.EAST, remarqueLabel);
    		springLayout.putConstraint(SpringLayout.NORTH, scrollPane, 5,
    				SpringLayout.NORTH, container);
    		springLayout.putConstraint(SpringLayout.EAST, scrollPane, -5,
    				SpringLayout.EAST, container);
    		springLayout.putConstraint(SpringLayout.SOUTH, scrollPane, -5,
    				SpringLayout.SOUTH, container);
    		
    		textArea.addKeyListener(new KeyListener() {
    
    			@Override
    			public void keyTyped(KeyEvent e) {//获取字符
    				if(!String.valueOf(e.getKeyChar()).matches("\\p{Alnum}")) {//匹配非字母
    					if(String.valueOf(e.getKeyChar()).equals("你")) {//匹配字符
    						System.out.print("大家");//将你变成大家
    					}else if(!String.valueOf(e.getKeyChar()).matches("你")){
    						System.out.print(e.getKeyChar());
    					}else {
    						System.out.print(e.getKeyChar());
    					}
    					
    
    				}
    			}
    
    			@Override
    			public void keyPressed(KeyEvent e) {
    				// 写大写字母时，释放按键是不知道是否先释放的是shift还是字母按键；但是
    				// 可以肯定的是按按键时必须是先按的shift。
    				if (e.getKeyCode() == KeyEvent.VK_CONTROL || 
    						e.getKeyCode() == KeyEvent.VK_SHIFT ||
    						e.getKeyCode() == KeyEvent.VK_ALT) {
    //					System.out.print("测试"+e.getSource());
    				}
    				if (!(e.isControlDown() || e.isShiftDown() || e.isAltDown())) {
    //					System.out.print(e.getSource());
    				}
    				String keyText = KeyEvent.getKeyText(e.getKeyCode());
    				if (e.isActionKey()) {
    //					System.out.print("The action key you pressed : " + "\""
    //							+ keyText + "");这里是显示字母输入
    					string+=keyText;
    					
    					
    				} else {
    					//控制键
    					if(keyText.matches("\\p{Alpha}{1}")) {
    						if(i==9) {
    						i=0;
    						stringfiveString="";
    					}
    					stringfiveString+= keyText;
    					i++;
    					}
    					
    					int keyCode = e.getKeyCode();
    					switch (keyCode) {
    					case KeyEvent.VK_CONTROL:
    						System.out.println("您按了Control键");
    						break;
    					case KeyEvent.VK_SHIFT:
    						System.out.println("您按了Shift键");
    						break;
    					case KeyEvent.VK_ALT:
    						System.out.println("您按了Alt键");
    						break;
    					case KeyEvent.VK_BACK_SPACE:
    						stringfiveString="";
    						textArea.setText(null);
    						break;
    					case KeyEvent.VK_ENTER:
    						if(textArea.getText().trim().equals("close")) {
    							System.exit(2);
    						}
    						if(textArea.getText().trim().equals("CLOSE")) {
    							System.exit(2);
    						}
    						break;
    					}
    					
    				}
    				if(stringfiveString.lastIndexOf("CLOSE")!=-1) {
    					System.out.println("E再见");
    					System.exit(2);
    				}else {
    					System.out.print(keyText);
    				}
    			}
    
    			@Override
    			public void keyReleased(KeyEvent e) {
    //				System.out.print(
    //						KeyEvent.getKeyText(e.getKeyCode()) + );//输出控制键
    			}
    
    		});
    	}
    
    	/**
    	 * @param args
    	 */
    	public static void main(String[] args) {
    		System.out.println("请在java程序输入内容");
    		System.out.println("输入你好自动换成大家好");
    		System.err.println("退出前请清空文本，再输入close并按回车键");
    		KeyEvent_1 frame = new KeyEvent_1();
    		frame.setTitle("KeyEvent Test");
    		frame.setVisible(true);
    		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    		frame.setBounds(0, 0, 600, 300);
    	}
    
    }