public void menuFrame() {
		if (jFrame == null) {
			jFrame = new JFrame("计算器");
			jFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
			textField = new JTextField();
			textField.setSize(240, 60);
			textField.setHorizontalAlignment(JTextField.RIGHT);
			jFrame.setLayout(new BorderLayout(5, 5));
			jFrame.add(textField, BorderLayout.NORTH);

			jPanel = new JPanel();
			jPanel.setLayout(new GridLayout(4, 4, 5, 5));

			button1 = new JButton("1");
			button1.setSize(60, 60);
			button1.addActionListener(this);
			jPanel.add(button1);

			button2 = new JButton("2");
			button2.setSize(60, 60);
			button2.addActionListener(this);
			jPanel.add(button2);

			button3 = new JButton("3");
			button3.setSize(60, 60);
			button3.addActionListener(this);
			jPanel.add(button3);

			buttona = new JButton("+");
			buttona.setSize(60, 60);
			buttona.addActionListener(this);
			jPanel.add(buttona);

			button4 = new JButton("4");
			button4.setSize(60, 60);
			button4.addActionListener(this);
			jPanel.add(button4);

			button5 = new JButton("5");
			button5.setSize(60, 60);
			button5.addActionListener(this);
			jPanel.add(button5);

			button6 = new JButton("6");
			button6.setSize(60, 60);
			button6.addActionListener(this);
			jPanel.add(button6);

			buttonb = new JButton("-");
			buttonb.setSize(60, 60);
			buttonb.addActionListener(this);
			jPanel.add(buttonb);

			button7 = new JButton("7");
			button7.setSize(60, 60);
			button7.addActionListener(this);
			jPanel.add(button7);

			button8 = new JButton("8");
			button8.setSize(60, 60);
			button8.addActionListener(this);
			jPanel.add(button8);

			button9 = new JButton("9");
			button9.setSize(60, 60);
			button9.addActionListener(this);
			jPanel.add(button9);

			buttonc = new JButton("*");
			buttonc.setSize(60, 60);
			buttonc.addActionListener(this);
			jPanel.add(buttonc);

			button0 = new JButton("0");
			button0.setSize(60, 60);
			button0.addActionListener(this);
			jPanel.add(button0);

			buttone = new JButton(".");
			buttone.setSize(60, 60);
			buttone.addActionListener(this);
			jPanel.add(buttone);

			buttonf = new JButton("=");
			buttonf.setSize(60, 60);
			buttonf.addActionListener(this);
			jPanel.add(buttonf);

			buttond = new JButton("/");
			buttond.setSize(60, 60);
			buttond.addActionListener(this);
			jPanel.add(buttond);

			jFrame.add(jPanel, BorderLayout.CENTER);
			jFrame.pack();
			jFrame.setResizable(false);
			;

			jFrame.setVisible(true);

		}
	}