java使用综合布局实现简易乘法计算机

以下是Java使用综合布局实现简易乘法计算器的示例代码：

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

public class MultiplicationCalculator {

    private JFrame frame;
    private JTextField num1Field;
    private JTextField num2Field;
    private JLabel resultLabel;

    public MultiplicationCalculator() {
        frame = new JFrame("乘法计算器");

        JPanel panel = new JPanel(new GridLayout(3, 2, 10, 10));
        panel.setBorder(BorderFactory.createEmptyBorder(10, 10, 10, 10));

        JLabel num1Label = new JLabel("第一个数：");
        num1Field = new JTextField();
        JLabel num2Label = new JLabel("第二个数：");
        num2Field = new JTextField();
        JButton calculateButton = new JButton("计算");
        resultLabel = new JLabel();

        panel.add(num1Label);
        panel.add(num1Field);
        panel.add(num2Label);
        panel.add(num2Field);
        panel.add(new JLabel());
        panel.add(calculateButton);

        calculateButton.addActionListener(e -> {
            try {
                int num1 = Integer.parseInt(num1Field.getText());
                int num2 = Integer.parseInt(num2Field.getText());
                int result = num1 * num2;
                resultLabel.setText(num1 + " * " + num2 + " = " + result);
            } catch (NumberFormatException ex) {
                resultLabel.setText("输入格式错误！");
            }
        });

        JPanel resultPanel = new JPanel();
        resultPanel.setBorder(BorderFactory.createEmptyBorder(10, 10, 10, 10));
        resultPanel.add(resultLabel);

        frame.add(panel, BorderLayout.CENTER);
        frame.add(resultPanel, BorderLayout.SOUTH);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.pack();
        frame.setVisible(true);
    }

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

这个程序使用了Swing框架，创建了一个包含两个文本框、一个按钮和一个标签的面板，并将面板和标签添加到了窗口中。当用户点击“计算”按钮时，程序会读取文本框中的数值，进行乘法运算，并将结果显示在标签中。你可以将这段代码复制到Java开发环境中进行编译和运行。