Java给JFrame窗口设置热键---不完整记事本

使用了简单的JFrame窗口，在窗口中添加菜单，菜单选项，点击鼠标右键出现右键菜单，用io流将输入文本域的内容保存。并设置热键alt+x为退出的热键

public class MyNotepad extends JFrame{
	//菜单栏
	private JMenuBar jmb = new JMenuBar();
	//菜单
	private JMenu jmFile = new JMenu("文件(F)");
	private JMenu jmEdit = new JMenu("编辑(E)");
	private JMenu jmFormat = new JMenu("格式(O)");
	private JMenu jmFind = new JMenu("查看(V)");
	private JMenu jmHelp = new JMenu("帮助(H)");

//菜单项
private JMenuItem jmiNew = new JMenuItem("新建");
private JMenuItem jmiOpen = new JMenuItem("打开");
private JMenuItem jmiSave = new JMenuItem("保存");
private JMenuItem jmiOther = new JMenuItem("另存为");
private JMenuItem jmiExit = new JMenuItem("退出(X)");


private JCheckBoxMenuItem jmiAutoLine = new JCheckBoxMenuItem("自动换行");
private JMenuItem jmiFont = new JMenuItem("字体");

private JFileChooser jfc = new JFileChooser();

private JTextArea jta = new JTextArea();
private JScrollPane jsp = new JScrollPane(jta);

//上下文菜单
private JPopupMenu jpm = new JPopupMenu();
private JMenuItem jmiCopy = new JMenuItem("复制");
private JMenuItem jmiPaste = new JMenuItem("粘贴");

public MyNotepad() {
	this.setTitle("记事本");
	this.setSize(600,400);
	this.setLocationRelativeTo(null);
	this.setDefaultCloseOperation(EXIT_ON_CLOSE);
	
	this.add(jmb,BorderLayout.NORTH);
	
	jmb.add(jmFile);
	jmb.add(jmEdit);
	jmb.add(jmFormat);
	jmb.add(jmFind);
	jmb.add(jmHelp);
	
	jmFile.add(jmiNew);
	jmFile.add(jmiOpen);
	jmFile.add(jmiSave);
	jmFile.add(jmiOther);
	jmFile.addSeparator();
	jmFile.add(jmiExit);
	
	jmFormat.add(jmiAutoLine);
	jmFormat.add(jmiFont);
	
	//上下文菜单
	jpm.add(jmiCopy);
	jpm.add(jmiPaste);
	jpm.add(jmFile);
	jta.addMouseListener(new MouseAdapter() {
		public void mouseClicked(MouseEvent e) {
			if(e.getButton() == 3){
				jpm.show(jta, e.getX(), e.getY());
			}
		}
	});
	
	//文本域自动换行
	this.add(jsp,BorderLayout.CENTER);
	
	jmiAutoLine.addActionListener(new ActionListener() {
		public void actionPerformed(ActionEvent e) {
			boolean selected = jmiAutoLine.isSelected();
			if(selected){
				jta.setLineWrap(true);
			}else{
				jta.setLineWrap(false);
			}
		}
	});

//		文件新建窗口
		jmiNew.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				int choose = jfc.showOpenDialog(MyNotepad.this);
				switch (choose) {
				case JFileChooser.APPROVE_OPTION:
					System.out.println("点击了打开");
					break;
				case JFileChooser.CANCEL_OPTION:
					System.out.println("点击了取消");
					break;
				}
			}
		});

		//文件保存窗口，用随机数命名文件名随时保存进新的文件
        jmiSave.addActionListener(new ActionListener() {
			
			@Override
			public void actionPerformed(ActionEvent arg0) {
				Random r = new Random();
				int a = r.nextInt(100);
				File file = new File("D:\\桌面\\b"+"r"+"a.txt");
				try {
					FileOutputStream fis = new FileOutputStream(file,true);
					BufferedOutputStream bis = new BufferedOutputStream(fis);
					byte [] b = jta.getText().getBytes();
					try {
						bis.write(b);
						bis.flush();
						bis.close();
					} catch (IOException e) {
						// TODO Auto-generated catch block
						e.printStackTrace();
					}
					
				} catch (FileNotFoundException e) {
					e.printStackTrace();
				}
				
			}
		});
		
		jmiExit.registerKeyboardAction(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				System.exit(0);
			}
		}, KeyStroke.getKeyStroke(KeyEvent.VK_X,KeyEvent.ALT_DOWN_MASK), 
				JComponent.WHEN_IN_FOCUSED_WINDOW);//1.设置监听事件。2.设置热键alt+x关闭窗口3.设置触发当鼠标聚焦在窗口时
		
		jmiExit.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				System.exit(0);
			}
		});
		
		this.setVisible(true);
	}
	
	public static void main(String[] args) {
		new MyNotepad();
	}
}

来源：oschina

链接：https://my.oschina.net/u/4408053/blog/4407520