java计算器2、8、10进制

好的，下面是一个Java计算器的示例代码，它支持2、8、10进制计算：

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

public class Calculator extends JFrame implements ActionListener {
    private JTextField display;
    private String operator = "";
    private double num1 = 0, num2 = 0;
    private boolean decimal = false;
    private int base = 10;

    public Calculator() {
        super("Calculator");

        // Create the display field
        display = new JTextField("0");
        display.setEditable(false);
        display.setHorizontalAlignment(JTextField.RIGHT);
        getContentPane().add(display, BorderLayout.NORTH);

        // Create the button panel
        JPanel buttonPanel = new JPanel(new GridLayout(4, 4));

        // Add the number buttons
        for (int i = 0; i <= 9; i++) {
            JButton button = new JButton(Integer.toString(i, base));
            button.addActionListener(this);
            buttonPanel.add(button);
        }

        // Add the operator buttons
        JButton addButton = new JButton("+");
        addButton.addActionListener(this);
        buttonPanel.add(addButton);

        JButton subtractButton = new JButton("-");
        subtractButton.addActionListener(this);
        buttonPanel.add(subtractButton);

        JButton multiplyButton = new JButton("*");
        multiplyButton.addActionListener(this);
        buttonPanel.add(multiplyButton);

        JButton divideButton = new JButton("/");
        divideButton.addActionListener(this);
        buttonPanel.add(divideButton);

        JButton equalsButton = new JButton("=");
        equalsButton.addActionListener(this);
        buttonPanel.add(equalsButton);

        JButton clearButton = new JButton("C");
        clearButton.addActionListener(this);
        buttonPanel.add(clearButton);

        JButton decimalButton = new JButton(".");
        decimalButton.addActionListener(this);
        buttonPanel.add(decimalButton);

        JButton binaryButton = new JButton("Bin");
        binaryButton.addActionListener(this);
        buttonPanel.add(binaryButton);

        JButton octalButton = new JButton("Oct");
        octalButton.addActionListener(this);
        buttonPanel.add(octalButton);

        JButton decimalBaseButton = new JButton("Dec");
        decimalBaseButton.addActionListener(this);
        buttonPanel.add(decimalBaseButton);

        getContentPane().add(buttonPanel, BorderLayout.CENTER);
    }

    public void actionPerformed(ActionEvent e) {
        String action = e.getActionCommand();
        if (action.equals("+") || action.equals("-") || action.equals("*") || action.equals("/")) {
            operator = action;
            num1 = Double.parseDouble(display.getText());
            display.setText("0");
            decimal = false;
        } else if (action.equals("=")) {
            num2 = Double.parseDouble(display.getText());
            double result = 0;
            if (operator.equals("+")) {
                result = num1 + num2;
            } else if (operator.equals("-")) {
                result = num1 - num2;
            } else if (operator.equals("*")) {
                result = num1 * num2;
            } else if (operator.equals("/")) {
                result = num1 / num2;
            }
            display.setText(Double.toString(result));
            decimal = false;
        } else if (action.equals("C")) {
            display.setText("0");
            decimal = false;
        } else if (action.equals(".")) {
            if (!decimal) {
                display.setText(display.getText() + ".");
                decimal = true;
            }
        } else if (action.equals("Bin")) {
            base = 2;
            display.setText(Integer.toString((int) num1, base));
        } else if (action.equals("Oct")) {
            base = 8;
            display.setText(Integer.toString((int) num1, base));
        } else if (action.equals("Dec")) {
            base = 10;
            display.setText(Double.toString(num1));
        } else {
            if (display.getText().equals("0")) {
                display.setText(action);
            } else {
                display.setText(display.getText() + action);
            }
        }
    }

    public static void main(String[] args) {
        Calculator calculator = new Calculator();
        calculator.setSize(300, 300);
        calculator.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        calculator.setVisible(true);
    }
}

该计算器类使用Swing库来实现GUI界面，并实现了ActionListener接口以处理各种事件。它支持数字输入、四则运算、小数点输入、清除、二进制、八进制、十进制数的转换。

希望这个示例代码可以帮到您！