fjc

Operate.java

@@ -37,13 +37,16 @@ public class Operate {
         // 显示区域
         displayField = new JTextField();
         displayField.setEditable(false);
-        displayField.setFont(new Font("Arial", Font.BOLD, 20));
+        displayField.setFont(new Font("Arial", Font.BOLD, 24));
         displayField.setHorizontalAlignment(JTextField.RIGHT);
+        displayField.setBorder(BorderFactory.createLineBorder(Color.GRAY, 2));
+        displayField.setBackground(Color.WHITE);
+        displayField.setForeground(Color.BLACK);
         frame.getContentPane().add(displayField, BorderLayout.NORTH);
 
         // 按钮面板
         JPanel buttonPanel = new JPanel();
-        buttonPanel.setLayout(new GridLayout(5, 4));
+        buttonPanel.setLayout(new GridLayout(5, 4, 5, 5)); // 增加间距
         frame.getContentPane().add(buttonPanel, BorderLayout.CENTER);
 
         // 数字按钮
@@ -60,8 +63,11 @@ public class Operate {
                     }
                 }
             });
+            button.setFont(new Font("Arial", Font.BOLD, 18));
+            button.setBackground(Color.LIGHT_GRAY);
+            button.setForeground(Color.BLACK);
+            button.setBorder(BorderFactory.createLineBorder(Color.GRAY, 2));
             buttonPanel.add(button);
-            if (i % 3 == 0) buttonPanel.add(new JButton()); // 空位
         }
 
         // 添加0按钮
@@ -71,6 +77,10 @@ public class Operate {
                 displayField.setText(displayField.getText() + "0");
             }
         });
+        buttonZero.setFont(new Font("Arial", Font.BOLD, 18));
+        buttonZero.setBackground(Color.LIGHT_GRAY);
+        buttonZero.setForeground(Color.BLACK);
+        buttonZero.setBorder(BorderFactory.createLineBorder(Color.GRAY, 2));
         buttonPanel.add(buttonZero);
 
         // 小数点按钮
@@ -80,6 +90,10 @@ public class Operate {
                 displayField.setText(displayField.getText() + ".");
             }
         });
+        buttonDecimal.setFont(new Font("Arial", Font.BOLD, 18));
+        buttonDecimal.setBackground(Color.LIGHT_GRAY);
+        buttonDecimal.setForeground(Color.BLACK);
+        buttonDecimal.setBorder(BorderFactory.createLineBorder(Color.GRAY, 2));
         buttonPanel.add(buttonDecimal);
 
         // 运算符按钮
@@ -93,6 +107,13 @@ public class Operate {
             }
             return a / b;
         });
+        addOperatorButton(buttonPanel, "%", (a, b) -> {
+            if (b == 0) {
+                JOptionPane.showMessageDialog(frame, "除数不能为0！", "错误", JOptionPane.ERROR_MESSAGE);
+                return Double.NaN;
+            }
+            return a % b;
+        });
 
         // 清除按钮
         JButton clearButton = new JButton("C");
@@ -103,11 +124,19 @@ public class Operate {
             operator = "";
             newNumber = true;
         });
+        clearButton.setFont(new Font("Arial", Font.BOLD, 18));
+        clearButton.setBackground(Color.LIGHT_GRAY);
+        clearButton.setForeground(Color.BLACK);
+        clearButton.setBorder(BorderFactory.createLineBorder(Color.GRAY, 2));
         buttonPanel.add(clearButton);
 
         // 等于号按钮
         JButton equalsButton = new JButton("=");
         equalsButton.addActionListener(e -> calculate());
+        equalsButton.setFont(new Font("Arial", Font.BOLD, 18));
+        equalsButton.setBackground(Color.GREEN);
+        equalsButton.setForeground(Color.WHITE);
+        equalsButton.setBorder(BorderFactory.createLineBorder(Color.GRAY, 2));
         buttonPanel.add(equalsButton);
 
         // 设置按钮样式
@@ -116,13 +145,24 @@ public class Operate {
 
     private void addOperatorButton(JPanel panel, String op, BiFunction<Double, Double, Double> operation) {
         JButton button = new JButton(op);
-        button.addActionListener(e -> {
-            firstNumber = Double.parseDouble(displayField.getText());
-            operator = op;
-            // 重置 displayField 的内容
-            displayField.setText("");
-            newNumber = true;
+        button.addActionListener(new ActionListener() {
+            @Override
+            public void actionPerformed(ActionEvent e) {
+                if (newNumber && !operator.isEmpty()) {
+                    JOptionPane.showMessageDialog(frame, "连续输入运算符无效，请先输入数字或点击等于号！", "错误", JOptionPane.ERROR_MESSAGE);
+                    return;
+                }
+                firstNumber = Double.parseDouble(displayField.getText());
+                operator = op;
+                // 重置 displayField 的内容
+                displayField.setText("");
+                newNumber = true;
+            }
         });
+        button.setFont(new Font("Arial", Font.BOLD, 18));
+        button.setBackground(Color.LIGHT_GRAY);
+        button.setForeground(Color.BLACK);
+        button.setBorder(BorderFactory.createLineBorder(Color.GRAY, 2));
         panel.add(button);
     }
 
@@ -145,6 +185,13 @@ public class Operate {
                 }
                 displayField.setText(String.valueOf(firstNumber / secondNumber));
                 break;
+            case "%":
+                if (secondNumber == 0) {
+                    JOptionPane.showMessageDialog(frame, "除数不能为0！", "错误", JOptionPane.ERROR_MESSAGE);
+                    return;
+                }
+                displayField.setText(String.valueOf(firstNumber % secondNumber));
+                break;
         }
         newNumber = true;
     }
@@ -153,11 +200,13 @@ public class Operate {
         for (Component c : panel.getComponents()) {
             if (c instanceof JButton) {
                 JButton button = (JButton) c;
-                button.setFont(new Font("Arial", Font.BOLD, 16));
+                button.setFont(new Font("Arial", Font.BOLD, 18));
                 button.setBackground(Color.LIGHT_GRAY);
                 button.setForeground(Color.BLACK);
-                button.setBorder(BorderFactory.createLineBorder(Color.DARK_GRAY));
+                button.setBorder(BorderFactory.createLineBorder(Color.GRAY, 2));
             }
         }
     }
 }
+
+