java学生四则运算系统图形

以下是一个简单的 Java 学生四则运算系统图形实现的示例代码：

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.Random;

public class ArithmeticGUI extends JFrame implements ActionListener {

    private JLabel num1Label, num2Label, operatorLabel, resultLabel;
    private JTextField num1Field, num2Field, operatorField, resultField;
    private JButton submitButton;

    public ArithmeticGUI() {
        setSize(300, 200);
        setTitle("学生四则运算系统");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        num1Label = new JLabel("数字1:");
        num2Label = new JLabel("数字2:");
        operatorLabel = new JLabel("运算符:");
        resultLabel = new JLabel("结果:");

        num1Field = new JTextField(10);
        num2Field = new JTextField(10);
        operatorField = new JTextField(10);
        resultField = new JTextField(10);
        resultField.setEditable(false);

        submitButton = new JButton("计算");
        submitButton.addActionListener(this);

        JPanel panel = new JPanel(new GridLayout(5, 2));
        panel.add(num1Label);
        panel.add(num1Field);
        panel.add(num2Label);
        panel.add(num2Field);
        panel.add(operatorLabel);
        panel.add(operatorField);
        panel.add(resultLabel);
        panel.add(resultField);
        panel.add(submitButton);

        add(panel);
        setVisible(true);
    }

    @Override
    public void actionPerformed(ActionEvent e) {
        if (e.getSource() == submitButton) {
            try {
                int num1 = Integer.parseInt(num1Field.getText());
                int num2 = Integer.parseInt(num2Field.getText());
                String operator = operatorField.getText();
                int result = 0;

                switch (operator) {
                    case "+":
                        result = num1 + num2;
                        break;
                    case "-":
                        result = num1 - num2;
                        break;
                    case "*":
                        result = num1 * num2;
                        break;
                    case "/":
                        result = num1 / num2;
                        break;
                    default:
                        JOptionPane.showMessageDialog(this, "无效的运算符");
                        return;
                }

                resultField.setText(String.valueOf(result));
            } catch (NumberFormatException ex) {
                JOptionPane.showMessageDialog(this, "请输入整数");
            } catch (ArithmeticException ex) {
                JOptionPane.showMessageDialog(this, "除数不能为零");
            }
        }
    }

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

该程序使用了 Java 的 Swing GUI 库来创建一个简单的窗口，其中包含两个文本框和一个按钮。当用户输入数字和运算符并点击按钮时，程序会根据运算符计算结果并将其显示在另一个文本框中。在计算过程中，程序会检查用户输入的数字是否为整数，以及除数是否为零，并在必要时弹出错误消息框。