高晨纲提交

jisuanji/Calculator.java

@@ -1,4 +1,5 @@
 package jisuanji;
+
 public class Calculator {
     // 加法
     public double add(double a, double b) {
@@ -17,15 +18,18 @@ public class Calculator {
 
     // 除法
     public double divide(double a, double b) {
-        if (b != 0) {
+        if (b == 0) {
-            return a / b;
+            throw new ArithmeticException("除数不能为零");
-        } else {
-            throw new IllegalArgumentException("除数不能为零");
         }
+        return a / b;
     }
 
     // 取余
     public double modulus(double a, double b) {
+        if (b == 0) {
+            throw new ArithmeticException("除数不能为零");
+        }
         return a % b;
     }
 }
+

jisuanji/CalculatorGUI.java

@@ -5,88 +5,156 @@ import java.awt.*;
 import java.awt.event.ActionEvent;
 import java.awt.event.ActionListener;
 
-public class CalculatorGUI extends JFrame {
+public class CalculatorGUI extends JFrame implements ActionListener {
     private JTextField display;
-    private Calculator calculator = new Calculator();
+    private JPanel panel;
-    private double firstNumber = 0;
+    private JButton[] numberButtons;
-    private double secondNumber = 0;
+    private JButton[] functionButtons;
-    private String operation = "";
+    private JButton addButton, subButton, mulButton, divButton, modButton, equalsButton, clearButton;
-    private boolean isOperationClicked = false;
+    private Calculator calculator;
 
     public CalculatorGUI() {
-        setTitle("简易计算器");
+        calculator = new Calculator();
-        setSize(400, 600);
+        setTitle("Simple Calculator");
+        setSize(400, 500);
         setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
         setLocationRelativeTo(null);
 
         display = new JTextField();
         display.setEditable(false);
-        display.setFont(new Font("Arial", Font.PLAIN, 40));
+        display.setFont(new Font("Arial", Font.BOLD, 24));
-        display.setHorizontalAlignment(JTextField.RIGHT);
+        add(display, BorderLayout.NORTH);
-        display.setBorder(BorderFactory.createLineBorder(Color.BLACK));
+
-
+        panel = new JPanel();
-        JPanel panel = new JPanel();
+        panel.setLayout(new GridLayout(5, 4, 10, 10));
-        panel.setLayout(new GridLayout(4, 4, 10, 10));
+
-
+        // 数字按钮
-        String[] buttons = {
+        numberButtons = new JButton[10];
-                "7", "8", "9", "/",
+        for (int i = 0; i < 10; i++) {
-                "4", "5", "6", "*",
+            numberButtons[i] = new JButton(String.valueOf(i));
-                "1", "2", "3", "-",
+            numberButtons[i].setFont(new Font("Arial", Font.BOLD, 24));
-                "0", ".", "=", "+"
+            numberButtons[i].addActionListener(this);
-        };
+            panel.add(numberButtons[i]);
-
-        for (String buttonText : buttons) {
-            JButton button = new JButton(buttonText);
-            button.setFont(new Font("Arial", Font.PLAIN, 24));
-            button.addActionListener(new ButtonClickListener());
-            panel.add(button);
         }
 
-        add(display, BorderLayout.NORTH);
+        // 功能按钮
-        add(panel, BorderLayout.CENTER);
+        addButton = new JButton("+");
+        subButton = new JButton("-");
+        mulButton = new JButton("*");
+        divButton = new JButton("/");
+        modButton = new JButton("%");
+        equalsButton = new JButton("=");
+        clearButton = new JButton("C");
+
+        addButton.setFont(new Font("Arial", Font.BOLD, 24));
+        subButton.setFont(new Font("Arial", Font.BOLD, 24));
+        mulButton.setFont(new Font("Arial", Font.BOLD, 24));
+        divButton.setFont(new Font("Arial", Font.BOLD, 24));
+        modButton.setFont(new Font("Arial", Font.BOLD, 24));
+        equalsButton.setFont(new Font("Arial", Font.BOLD, 24));
+        clearButton.setFont(new Font("Arial", Font.BOLD, 24));
 
-        setVisible(true);
+        addButton.addActionListener(this);
+        subButton.addActionListener(this);
+        mulButton.addActionListener(this);
+        divButton.addActionListener(this);
+        modButton.addActionListener(this);
+        equalsButton.addActionListener(this);
+        clearButton.addActionListener(this);
+
+        panel.add(addButton);
+        panel.add(subButton);
+        panel.add(mulButton);
+        panel.add(divButton);
+        panel.add(modButton);
+        panel.add(equalsButton);
+        panel.add(clearButton);
+
+        // 空白按钮占位
+        JButton space1 = new JButton(" ");
+        JButton space2 = new JButton(" ");
+        panel.add(space1);
+        panel.add(space2);
+
+        add(panel, BorderLayout.CENTER);
     }
 
-    private class ButtonClickListener implements ActionListener {
     @Override
     public void actionPerformed(ActionEvent e) {
-            String command = e.getActionCommand();
+        for (int i = 0; i < 10; i++) {
+            if (e.getSource() == numberButtons[i]) {
+                display.setText(display.getText() + i);
+            }
+        }
 
-            if ("0123456789.".indexOf(command) >= 0) {
+        if (e.getSource() == addButton) {
-                display.setText(display.getText() + command);
+            currentOperation = '+';
-                isOperationClicked = false;
+            firstNumber = Double.parseDouble(display.getText());
-            } else if ("+*/-=".indexOf(command) >= 0) {
+            display.setText("");
-                if (!isOperationClicked) {
+        } else if (e.getSource() == subButton) {
+            currentOperation = '-';
             firstNumber = Double.parseDouble(display.getText());
-                    operation = command;
-                    isOperationClicked = true;
             display.setText("");
-                } else if (command.equals("=")) {
+        } else if (e.getSource() == mulButton) {
+            currentOperation = '*';
+            firstNumber = Double.parseDouble(display.getText());
+            display.setText("");
+        } else if (e.getSource() == divButton) {
+            currentOperation = '/';
+            firstNumber = Double.parseDouble(display.getText());
+            display.setText("");
+        } else if (e.getSource() == modButton) {
+            currentOperation = '%';
+            firstNumber = Double.parseDouble(display.getText());
+            display.setText("");
+        } else if (e.getSource() == equalsButton) {
             secondNumber = Double.parseDouble(display.getText());
             double result = 0;
-                    switch (operation) {
+            switch (currentOperation) {
-                        case "+":
+                case '+':
                     result = calculator.add(firstNumber, secondNumber);
                     break;
-                        case "-":
+                case '-':
                     result = calculator.subtract(firstNumber, secondNumber);
                     break;
-                        case "*":
+                case '*':
                     result = calculator.multiply(firstNumber, secondNumber);
                     break;
-                        case "/":
+                case '/':
+                    try {
                         result = calculator.divide(firstNumber, secondNumber);
-                            break;
+                    } catch (ArithmeticException ex) {
+                        display.setText("错误: 除数不能为零");
+                        return;
                     }
-                    display.setText(String.valueOf(result));
+                    break;
-                    isOperationClicked = false;
+                case '%':
+                    try {
+                        result = calculator.modulus(firstNumber, secondNumber);
+                    } catch (ArithmeticException ex) {
+                        display.setText("错误: 除数不能为零");
+                        return;
                     }
+                    break;
             }
+            display.setText(String.valueOf(result));
+            currentOperation = '\0'; // 重置操作符
+        } else if (e.getSource() == clearButton) {
+            display.setText("");
+            currentOperation = '\0'; // 重置操作符
+            firstNumber = 0;
+            secondNumber = 0;
         }
     }
 
+    private char currentOperation = '\0';
+    private double firstNumber = 0;
+    private double secondNumber = 0;
+
     public static void main(String[] args) {
-        new CalculatorGUI();
+        SwingUtilities.invokeLater(() -> {
+            CalculatorGUI calculatorGUI = new CalculatorGUI();
+            calculatorGUI.setVisible(true);
+        });
     }
 }

jisuanji11/Calculator.java

@@ -0,0 +1,35 @@
+package jisuanji11;
+
+public class Calculator {
+    // 加法
+    public double add(double a, double b) {
+        return a + b;
+    }
+
+    // 减法
+    public double subtract(double a, double b) {
+        return a - b;
+    }
+
+    // 乘法
+    public double multiply(double a, double b) {
+        return a * b;
+    }
+
+    // 除法
+    public double divide(double a, double b) {
+        if (b == 0) {
+            throw new ArithmeticException("除数不能为零");
+        }
+        return a / b;
+    }
+
+    // 取余
+    public double modulus(double a, double b) {
+        if (b == 0) {
+            throw new ArithmeticException("除数不能为零");
+        }
+        return a % b;
+    }
+}
+

jisuanji11/CalculatorGUI.java

@@ -0,0 +1,160 @@
+package jisuanji11;
+
+import javax.swing.*;
+import java.awt.*;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+
+public class CalculatorGUI extends JFrame implements ActionListener {
+    private JTextField display;
+    private JPanel panel;
+    private JButton[] numberButtons;
+    private JButton[] functionButtons;
+    private JButton addButton, subButton, mulButton, divButton, modButton, equalsButton, clearButton;
+    private Calculator calculator;
+
+    public CalculatorGUI() {
+        calculator = new Calculator();
+        setTitle("Simple Calculator");
+        setSize(400, 500);
+        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+        setLocationRelativeTo(null);
+
+        display = new JTextField();
+        display.setEditable(false);
+        display.setFont(new Font("Arial", Font.BOLD, 24));
+        add(display, BorderLayout.NORTH);
+
+        panel = new JPanel();
+        panel.setLayout(new GridLayout(5, 4, 10, 10));
+
+        // 数字按钮
+        numberButtons = new JButton[10];
+        for (int i = 0; i < 10; i++) {
+            numberButtons[i] = new JButton(String.valueOf(i));
+            numberButtons[i].setFont(new Font("Arial", Font.BOLD, 24));
+            numberButtons[i].addActionListener(this);
+            panel.add(numberButtons[i]);
+        }
+
+        // 功能按钮
+        addButton = new JButton("+");
+        subButton = new JButton("-");
+        mulButton = new JButton("*");
+        divButton = new JButton("/");
+        modButton = new JButton("%");
+        equalsButton = new JButton("=");
+        clearButton = new JButton("C");
+
+        addButton.setFont(new Font("Arial", Font.BOLD, 24));
+        subButton.setFont(new Font("Arial", Font.BOLD, 24));
+        mulButton.setFont(new Font("Arial", Font.BOLD, 24));
+        divButton.setFont(new Font("Arial", Font.BOLD, 24));
+        modButton.setFont(new Font("Arial", Font.BOLD, 24));
+        equalsButton.setFont(new Font("Arial", Font.BOLD, 24));
+        clearButton.setFont(new Font("Arial", Font.BOLD, 24));
+
+        addButton.addActionListener(this);
+        subButton.addActionListener(this);
+        mulButton.addActionListener(this);
+        divButton.addActionListener(this);
+        modButton.addActionListener(this);
+        equalsButton.addActionListener(this);
+        clearButton.addActionListener(this);
+
+        panel.add(addButton);
+        panel.add(subButton);
+        panel.add(mulButton);
+        panel.add(divButton);
+        panel.add(modButton);
+        panel.add(equalsButton);
+        panel.add(clearButton);
+
+        // 空白按钮占位
+        JButton space1 = new JButton(" ");
+        JButton space2 = new JButton(" ");
+        panel.add(space1);
+        panel.add(space2);
+
+        add(panel, BorderLayout.CENTER);
+    }
+
+    @Override
+    public void actionPerformed(ActionEvent e) {
+        for (int i = 0; i < 10; i++) {
+            if (e.getSource() == numberButtons[i]) {
+                display.setText(display.getText() + i);
+            }
+        }
+
+        if (e.getSource() == addButton) {
+            currentOperation = '+';
+            firstNumber = Double.parseDouble(display.getText());
+            display.setText("");
+        } else if (e.getSource() == subButton) {
+            currentOperation = '-';
+            firstNumber = Double.parseDouble(display.getText());
+            display.setText("");
+        } else if (e.getSource() == mulButton) {
+            currentOperation = '*';
+            firstNumber = Double.parseDouble(display.getText());
+            display.setText("");
+        } else if (e.getSource() == divButton) {
+            currentOperation = '/';
+            firstNumber = Double.parseDouble(display.getText());
+            display.setText("");
+        } else if (e.getSource() == modButton) {
+            currentOperation = '%';
+            firstNumber = Double.parseDouble(display.getText());
+            display.setText("");
+        } else if (e.getSource() == equalsButton) {
+            secondNumber = Double.parseDouble(display.getText());
+            double result = 0;
+            switch (currentOperation) {
+                case '+':
+                    result = calculator.add(firstNumber, secondNumber);
+                    break;
+                case '-':
+                    result = calculator.subtract(firstNumber, secondNumber);
+                    break;
+                case '*':
+                    result = calculator.multiply(firstNumber, secondNumber);
+                    break;
+                case '/':
+                    try {
+                        result = calculator.divide(firstNumber, secondNumber);
+                    } catch (ArithmeticException ex) {
+                        display.setText("错误: 除数不能为零");
+                        return;
+                    }
+                    break;
+                case '%':
+                    try {
+                        result = calculator.modulus(firstNumber, secondNumber);
+                    } catch (ArithmeticException ex) {
+                        display.setText("错误: 除数不能为零");
+                        return;
+                    }
+                    break;
+            }
+            display.setText(String.valueOf(result));
+            currentOperation = '\0'; // 重置操作符
+        } else if (e.getSource() == clearButton) {
+            display.setText("");
+            currentOperation = '\0'; // 重置操作符
+            firstNumber = 0;
+            secondNumber = 0;
+        }
+    }
+
+    private char currentOperation = '\0';
+    private double firstNumber = 0;
+    private double secondNumber = 0;
+
+    public static void main(String[] args) {
+        SwingUtilities.invokeLater(() -> {
+            CalculatorGUI calculatorGUI = new CalculatorGUI();
+            calculatorGUI.setVisible(true);
+        });
+    }
+}

test/src/Calculator.java

@@ -0,0 +1,33 @@
+public class Calculator {
+    // 加法
+    public double add(double a, double b) {
+        return a + b;
+    }
+
+    // 减法
+    public double subtract(double a, double b) {
+        return a - b;
+    }
+
+    // 乘法
+    public double multiply(double a, double b) {
+        return a * b;
+    }
+
+    // 除法
+    public double divide(double a, double b) {
+        if (b == 0) {
+            throw new ArithmeticException("除数不能为零");
+        }
+        return a / b;
+    }
+
+    // 取余
+    public double modulus(double a, double b) {
+        if (b == 0) {
+            throw new ArithmeticException("除数不能为零");
+        }
+        return a % b;
+    }
+}
+

test/src/CalculatorGUI.java

@@ -0,0 +1,158 @@
+import javax.swing.*;
+import java.awt.*;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+
+public class CalculatorGUI extends JFrame implements ActionListener {
+    private JTextField display;
+    private JPanel panel;
+    private JButton[] numberButtons;
+    private JButton[] functionButtons;
+    private JButton addButton, subButton, mulButton, divButton, modButton, equalsButton, clearButton;
+    private Calculator calculator;
+
+    public CalculatorGUI() {
+        calculator = new Calculator();
+        setTitle("Simple Calculator");
+        setSize(400, 500);
+        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+        setLocationRelativeTo(null);
+
+        display = new JTextField();
+        display.setEditable(false);
+        display.setFont(new Font("Arial", Font.BOLD, 24));
+        add(display, BorderLayout.NORTH);
+
+        panel = new JPanel();
+        panel.setLayout(new GridLayout(5, 4, 10, 10));
+
+        // 数字按钮  
+        numberButtons = new JButton[10];
+        for (int i = 0; i < 10; i++) {
+            numberButtons[i] = new JButton(String.valueOf(i));
+            numberButtons[i].setFont(new Font("Arial", Font.BOLD, 24));
+            numberButtons[i].addActionListener(this);
+            panel.add(numberButtons[i]);
+        }
+
+        // 功能按钮  
+        addButton = new JButton("+");
+        subButton = new JButton("-");
+        mulButton = new JButton("*");
+        divButton = new JButton("/");
+        modButton = new JButton("%");
+        equalsButton = new JButton("=");
+        clearButton = new JButton("C");
+
+        addButton.setFont(new Font("Arial", Font.BOLD, 24));
+        subButton.setFont(new Font("Arial", Font.BOLD, 24));
+        mulButton.setFont(new Font("Arial", Font.BOLD, 24));
+        divButton.setFont(new Font("Arial", Font.BOLD, 24));
+        modButton.setFont(new Font("Arial", Font.BOLD, 24));
+        equalsButton.setFont(new Font("Arial", Font.BOLD, 24));
+        clearButton.setFont(new Font("Arial", Font.BOLD, 24));
+
+        addButton.addActionListener(this);
+        subButton.addActionListener(this);
+        mulButton.addActionListener(this);
+        divButton.addActionListener(this);
+        modButton.addActionListener(this);
+        equalsButton.addActionListener(this);
+        clearButton.addActionListener(this);
+
+        panel.add(addButton);
+        panel.add(subButton);
+        panel.add(mulButton);
+        panel.add(divButton);
+        panel.add(modButton);
+        panel.add(equalsButton);
+        panel.add(clearButton);
+
+        // 空白按钮占位  
+        JButton space1 = new JButton(" ");
+        JButton space2 = new JButton(" ");
+        panel.add(space1);
+        panel.add(space2);
+
+        add(panel, BorderLayout.CENTER);
+    }
+
+    @Override
+    public void actionPerformed(ActionEvent e) {
+        for (int i = 0; i < 10; i++) {
+            if (e.getSource() == numberButtons[i]) {
+                display.setText(display.getText() + i);
+            }
+        }
+
+        if (e.getSource() == addButton) {
+            currentOperation = '+';
+            firstNumber = Double.parseDouble(display.getText());
+            display.setText("");
+        } else if (e.getSource() == subButton) {
+            currentOperation = '-';
+            firstNumber = Double.parseDouble(display.getText());
+            display.setText("");
+        } else if (e.getSource() == mulButton) {
+            currentOperation = '*';
+            firstNumber = Double.parseDouble(display.getText());
+            display.setText("");
+        } else if (e.getSource() == divButton) {
+            currentOperation = '/';
+            firstNumber = Double.parseDouble(display.getText());
+            display.setText("");
+        } else if (e.getSource() == modButton) {
+            currentOperation = '%';
+            firstNumber = Double.parseDouble(display.getText());
+            display.setText("");
+        } else if (e.getSource() == equalsButton) {
+            secondNumber = Double.parseDouble(display.getText());
+            double result = 0;
+            switch (currentOperation) {
+                case '+':
+                    result = calculator.add(firstNumber, secondNumber);
+                    break;
+                case '-':
+                    result = calculator.subtract(firstNumber, secondNumber);
+                    break;
+                case '*':
+                    result = calculator.multiply(firstNumber, secondNumber);
+                    break;
+                case '/':
+                    try {
+                        result = calculator.divide(firstNumber, secondNumber);
+                    } catch (ArithmeticException ex) {
+                        display.setText("错误: 除数不能为零");
+                        return;
+                    }
+                    break;
+                case '%':
+                    try {
+                        result = calculator.modulus(firstNumber, secondNumber);
+                    } catch (ArithmeticException ex) {
+                        display.setText("错误: 除数不能为零");
+                        return;
+                    }
+                    break;
+            }
+            display.setText(String.valueOf(result));
+            currentOperation = '\0'; // 重置操作符  
+        } else if (e.getSource() == clearButton) {
+            display.setText("");
+            currentOperation = '\0'; // 重置操作符  
+            firstNumber = 0;
+            secondNumber = 0;
+        }
+    }
+
+    private char currentOperation = '\0';
+    private double firstNumber = 0;
+    private double secondNumber = 0;
+
+    public static void main(String[] args) {
+        SwingUtilities.invokeLater(() -> {
+            CalculatorGUI calculatorGUI = new CalculatorGUI();
+            calculatorGUI.setVisible(true);
+        });
+    }
+}