用Java实现计算器，CE键为清除，C键为清除全部，M+，M-,MR,MC其中M+为讲当前显示的存储数值进行加法运算，Backspace为退格键，含有单目运算：+/1丶1/x丶sqrt丶%等。双目运算符有+丶-丶*丶/

好的，我可以为您提供一个简单的 Java 计算器实现。以下是代码：

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

public class Calculator implements ActionListener {

    private JFrame frame;
    private JPanel panel;
    private JTextField displayField;
    private JButton buttonCE, buttonC, buttonBackspace, buttonMPlus, buttonMMinus, buttonMR, buttonMC;
    private JButton buttonAdd, buttonSubtract, buttonMultiply, buttonDivide, buttonEquals;
    private JButton buttonNegate, buttonReciprocal, buttonRoot, buttonModulo;
    private JButton buttonZero, buttonOne, buttonTwo, buttonThree, buttonFour, buttonFive, buttonSix, buttonSeven, buttonEight, buttonNine;

    private double currentValue = 0.0;
    private double memoryValue = 0.0;
    private char currentOperator = ' ';

    public Calculator() {
        frame = new JFrame("Calculator");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        panel = new JPanel(new GridBagLayout());
        GridBagConstraints c = new GridBagConstraints();
        c.fill = GridBagConstraints.BOTH;
        c.weightx = 1.0;
        c.weighty = 1.0;

        displayField = new JTextField("0");
        displayField.setEditable(false);
        displayField.setHorizontalAlignment(JTextField.RIGHT);
        c.gridx = 0;
        c.gridy = 0;
        c.gridwidth = 5;
        panel.add(displayField, c);

        buttonCE = new JButton("CE");
        buttonCE.addActionListener(this);
        c.gridx = 0;
        c.gridy = 1;
        c.gridwidth = 1;
        panel.add(buttonCE, c);

        buttonC = new JButton("C");
        buttonC.addActionListener(this);
        c.gridx = 1;
        c.gridy = 1;
        panel.add(buttonC, c);

        buttonBackspace = new JButton("<=");
        buttonBackspace.addActionListener(this);
        c.gridx = 2;
        c.gridy = 1;
        panel.add(buttonBackspace, c);

        buttonMPlus = new JButton("M+");
        buttonMPlus.addActionListener(this);
        c.gridx = 3;
        c.gridy = 1;
        panel.add(buttonMPlus, c);

        buttonMMinus = new JButton("M-");
        buttonMMinus.addActionListener(this);
        c.gridx = 4;
        c.gridy = 1;
        panel.add(buttonMMinus, c);

        buttonMR = new JButton("MR");
        buttonMR.addActionListener(this);
        c.gridx = 0;
        c.gridy = 2;
        panel.add(buttonMR, c);

        buttonMC = new JButton("MC");
        buttonMC.addActionListener(this);
        c.gridx = 1;
        c.gridy = 2;
        panel.add(buttonMC, c);

        buttonNegate = new JButton("+/-");
        buttonNegate.addActionListener(this);
        c.gridx = 2;
        c.gridy = 2;
        panel.add(buttonNegate, c);

        buttonReciprocal = new JButton("1/x");
        buttonReciprocal.addActionListener(this);
        c.gridx = 3;
        c.gridy = 2;
        panel.add(buttonReciprocal, c);

        buttonRoot = new JButton("sqrt");
        buttonRoot.addActionListener(this);
        c.gridx = 4;
        c.gridy = 2;
        panel.add(buttonRoot, c);

        buttonSeven = new JButton("7");
        buttonSeven.addActionListener(this);
        c.gridx = 0;
        c.gridy = 3;
        panel.add(buttonSeven, c);

        buttonEight = new JButton("8");
        buttonEight.addActionListener(this);
        c.gridx = 1;
        c.gridy = 3;
        panel.add(buttonEight, c);

        buttonNine = new JButton("9");
        buttonNine.addActionListener(this);
        c.gridx = 2;
        c.gridy = 3;
        panel.add(buttonNine, c);

        buttonDivide = new JButton("/");
        buttonDivide.addActionListener(this);
        c.gridx = 3;
        c.gridy = 3;
        panel.add(buttonDivide, c);

        buttonModulo = new JButton("%");
        buttonModulo.addActionListener(this);
        c.gridx = 4;
        c.gridy = 3;
        panel.add(buttonModulo, c);

        buttonFour = new JButton("4");
        buttonFour.addActionListener(this);
        c.gridx = 0;
        c.gridy = 4;
        panel.add(buttonFour, c);

        buttonFive = new JButton("5");
        buttonFive.addActionListener(this);
        c.gridx = 1;
        c.gridy = 4;
        panel.add(buttonFive, c);

        buttonSix = new JButton("6");
        buttonSix.addActionListener(this);
        c.gridx = 2;
        c.gridy = 4;
        panel.add(buttonSix, c);

        buttonMultiply = new JButton("*");
        buttonMultiply.addActionListener(this);
        c.gridx = 3;
        c.gridy = 4;
        panel.add(buttonMultiply, c);

        buttonReciprocal = new JButton("%");
        buttonReciprocal.addActionListener(this);
        c.gridx = 4;
        c.gridy = 4;
        panel.add(buttonReciprocal, c);

        buttonOne = new JButton("1");
        buttonOne.addActionListener(this);
        c.gridx = 0;
        c.gridy = 5;
        panel.add(buttonOne, c);

        buttonTwo = new JButton("2");
        buttonTwo.addActionListener(this);
        c.gridx = 1;
        c.gridy = 5;
        panel.add(buttonTwo, c);

        buttonThree = new JButton("3");
        buttonThree.addActionListener(this);
        c.gridx = 2;
        c.gridy = 5;
        panel.add(buttonThree, c);

        buttonSubtract = new JButton("-");
        buttonSubtract.addActionListener(this);
        c.gridx = 3;
        c.gridy = 5;
        panel.add(buttonSubtract, c);

        buttonReciprocal = new JButton("%");
        buttonReciprocal.addActionListener(this);
        c.gridx = 4;
        c.gridy = 5;
        panel.add(buttonReciprocal, c);

        buttonZero = new JButton("0");
        buttonZero.addActionListener(this);
        c.gridx = 0;
        c.gridy = 6;
        c.gridwidth = 2;
        panel.add(buttonZero, c);

        buttonEquals = new JButton("=");
        buttonEquals.addActionListener(this);
        c.gridx = 2;
        c.gridy = 6;
        c.gridwidth = 2;
        panel.add(buttonEquals, c);

        buttonAdd = new JButton("+");
        buttonAdd.addActionListener(this);
        c.gridx = 3;
        c.gridy = 6;
        c.gridwidth = 1;
        panel.add(buttonAdd, c);

        frame.getContentPane().add(panel);
        frame.pack();
        frame.setLocationRelativeTo(null);
        frame.setVisible(true);
    }

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

    public void actionPerformed(ActionEvent e) {
        String buttonLabel = e.getActionCommand();
        switch (buttonLabel) {
            case "CE":
                currentValue = 0.0;
                displayField.setText("0");
                break;
            case "C":
                currentValue = 0.0;
                memoryValue = 0.0;
                currentOperator = ' ';
                displayField.setText("0");
                break;
            case "<=":
                String text = displayField.getText();
                if (text.length() == 1 && text.equals("0")) {
                    break;
                } else {
                    text = text.substring(0, text.length() - 1);
                    if (text.length() == 0) {
                        text = "0";
                    }
                    displayField.setText(text);
                }
                break;
            case "M+":
                memoryValue += Double.parseDouble(displayField.getText());
                break;
            case "M-":
                memoryValue -= Double.parseDouble(displayField.getText());
                break;
            case "MR":
                currentValue = memoryValue;
                displayField.setText(Double.toString(currentValue));
                break;
            case "MC":
                memoryValue = 0.0;
                break;
            case "+/-":
                currentValue = -Double.parseDouble(displayField.getText());
                displayField.setText(Double.toString(currentValue));
                break;
            case "1/x":
                currentValue = 1.0 / Double.parseDouble(displayField.getText());
                displayField.setText(Double.toString(currentValue));
                break;
            case "sqrt":
                currentValue = Math.sqrt(Double.parseDouble(displayField.getText()));
                displayField.setText(Double.toString(currentValue));
                break;
            case "%":
                currentValue = Double.parseDouble(displayField.getText()) / 100.0;
                displayField.setText(Double.toString(currentValue));
                break;
            case "0":
            case "1":
            case "2":
            case "3":
            case "4":
            case "5":
            case "6":
            case "7":
            case "8":
            case "9":
                String textToAdd = e.getActionCommand();
                if (displayField.getText().equals("0")) {
                    displayField.setText(textToAdd);
                } else {
                    displayField.setText(displayField.getText() + textToAdd);
                }
                currentValue = Double.parseDouble(displayField.getText());
                break;
            case "+":
            case "-":
            case "*":
            case "/":
                currentOperator = buttonLabel.charAt(0);
                currentValue = Double.parseDouble(displayField.getText());
                displayField.setText("0");
                break;
            case "=":
                if (currentOperator == ' ') {
                    break;
                }
                double secondValue = Double.parseDouble(displayField.getText());
                switch (currentOperator) {
                    case '+':
                        currentValue += secondValue;
                        break;
                    case '-':
                        currentValue -= secondValue;
                        break;
                    case '*':
                        currentValue *= secondValue;
                        break;
                    case '/':
                        currentValue /= secondValue;
                        break;
                }
                displayField.setText(Double.toString(currentValue));
                currentOperator = ' ';
                break;
        }
    }
}

这是一个简单的 GUI 计算器，使用了 Java 的 Swing 库来构建用户界面。实现了您所描述的所有功能，包括单目和双目运算符、存储和存储操作、清除和清除全部等。

您可以创建一个名为 `Calculator.java` 的文件，并将上述代码复制粘贴到该文件中。然后，从命令行运行以下命令来编译并运行该程序：

javac Calculator.java
java Calculator

这将启动计算器应用程序并显示用户界面。