使用JAVA代码做出计算器的图形界面

以下是一个简单的计算器示例，使用Java Swing构建图形化用户界面：

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

public class Calculator extends JFrame implements ActionListener {
    private JTextField textField;
    private JButton button1, button2, button3, button4, button5, button6, button7, button8, button9, button0;
    private JButton addButton, subtractButton, multiplyButton, divideButton, equalButton, clearButton;
    private JPanel panel1, panel2;
    private double num1 = 0, num2 = 0;
    private String operator = "";

    public Calculator() {
        super("Calculator");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setLayout(new BorderLayout());

        // 创建文本框
        textField = new JTextField(30);
        textField.setEditable(false);
        textField.setHorizontalAlignment(JTextField.RIGHT);

        // 创建数字按钮
        button1 = new JButton("1");
        button2 = new JButton("2");
        button3 = new JButton("3");
        button4 = new JButton("4");
        button5 = new JButton("5");
        button6 = new JButton("6");
        button7 = new JButton("7");
        button8 = new JButton("8");
        button9 = new JButton("9");
        button0 = new JButton("0");

        // 创建操作符按钮
        addButton = new JButton("+");
        subtractButton = new JButton("-");
        multiplyButton = new JButton("*");
        divideButton = new JButton("/");
        equalButton = new JButton("=");
        clearButton = new JButton("C");

        // 添加按钮监听器
        button1.addActionListener(this);
        button2.addActionListener(this);
        button3.addActionListener(this);
        button4.addActionListener(this);
        button5.addActionListener(this);
        button6.addActionListener(this);
        button7.addActionListener(this);
        button8.addActionListener(this);
        button9.addActionListener(this);
        button0.addActionListener(this);
        addButton.addActionListener(this);
        subtractButton.addActionListener(this);
        multiplyButton.addActionListener(this);
        divideButton.addActionListener(this);
        equalButton.addActionListener(this);
        clearButton.addActionListener(this);

        // 创建面板并添加按钮
        panel1 = new JPanel();
        panel1.setLayout(new GridLayout(4, 3));
        panel1.add(button1);
        panel1.add(button2);
        panel1.add(button3);
        panel1.add(button4);
        panel1.add(button5);
        panel1.add(button6);
        panel1.add(button7);
        panel1.add(button8);
        panel1.add(button9);
        panel1.add(clearButton);
        panel1.add(button0);
        panel1.add(equalButton);

        panel2 = new JPanel();
        panel2.setLayout(new GridLayout(4, 1));
        panel2.add(addButton);
        panel2.add(subtractButton);
        panel2.add(multiplyButton);
        panel2.add(divideButton);

        // 添加组件到窗口
        add(textField, BorderLayout.NORTH);
        add(panel1, BorderLayout.CENTER);
        add(panel2, BorderLayout.EAST);

        pack();
        setVisible(true);
    }

    public void actionPerformed(ActionEvent e) {
        // 数字按钮的处理
        if (e.getSource() == button1) {
            textField.setText(textField.getText() + "1");
        } else if (e.getSource() == button2) {
            textField.setText(textField.getText() + "2");
        } else if (e.getSource() == button3) {
            textField.setText(textField.getText() + "3");
        } else if (e.getSource() == button4) {
            textField.setText(textField.getText() + "4");
        } else if (e.getSource() == button5) {
            textField.setText(textField.getText() + "5");
        } else if (e.getSource() == button6) {
            textField.setText(textField.getText() + "6");
        } else if (e.getSource() == button7) {
            textField.setText(textField.getText() + "7");
        } else if (e.getSource() == button8) {
            textField.setText(textField.getText() + "8");
        } else if (e.getSource() == button9) {
            textField.setText(textField.getText() + "9");
        } else if (e.getSource() == button0) {
            textField.setText(textField.getText() + "0");
        }

        // 操作符按钮的处理
        if (e.getSource() == addButton) {
            num1 = Double.parseDouble(textField.getText());
            operator = "+";
            textField.setText("");
        } else if (e.getSource() == subtractButton) {
            num1 = Double.parseDouble(textField.getText());
            operator = "-";
            textField.setText("");
        } else if (e.getSource() == multiplyButton) {
            num1 = Double.parseDouble(textField.getText());
            operator = "*";
            textField.setText("");
        } else if (e.getSource() == divideButton) {
            num1 = Double.parseDouble(textField.getText());
            operator = "/";
            textField.setText("");
        } else if (e.getSource() == equalButton) {
            num2 = Double.parseDouble(textField.getText());
            if (operator.equals("+")) {
                textField.setText(Double.toString(num1 + num2));
            } else if (operator.equals("-")) {
                textField.setText(Double.toString(num1 - num2));
            } else if (operator.equals("*")) {
                textField.setText(Double.toString(num1 * num2));
            } else if (operator.equals("/")) {
                textField.setText(Double.toString(num1 / num2));
            }
        } else if (e.getSource() == clearButton) {
            textField.setText("");
        }
    }

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

这个计算器可以进行加、减、乘、除四则运算，并且支持连续计算。您可以根据自己的需求进行修改和扩展。