夏晓静_4/12_关于计算器的新代码存档

src/c1.java

@@ -0,0 +1,167 @@
+import javax.swing.*;
+import java.awt.*;
+import java.awt.datatransfer.Clipboard;
+import java.awt.datatransfer.StringSelection;
+import java.awt.event.*;
+import java.io.File;
+import java.io.FileWriter;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+
+public class C1 extends JFrame implements ActionListener {
+	private JTextField displayField;
+	private JTextArea historyArea;
+	private List<String> historyList;
+
+	private double num1, num2;
+	private String operator;
+
+	public C1() {
+		super("Calculator");
+
+		historyList = new ArrayList<>();
+
+		// 设置布局
+		setLayout(new BorderLayout());
+
+		// 显示区域
+		JPanel displayPanel = new JPanel(new GridLayout(1, 2));
+		displayField = new JTextField();
+		displayField.setEditable(false);
+		historyArea = new JTextArea();
+		historyArea.setEditable(false);
+		JScrollPane historyScrollPane = new JScrollPane(historyArea);
+
+		displayPanel.add(displayField);
+		displayPanel.add(historyScrollPane);
+
+		add(displayPanel, BorderLayout.NORTH);
+
+		// 按钮区域
+		JPanel buttonPanel = new JPanel(new GridLayout(4, 4));
+		String[] buttonLabels = {
+				"7", "8", "9", "/",
+				"4", "5", "6", "*",
+				"1", "2", "3", "-",
+				"0", ".", "=", "+"
+		};
+
+		for (String label : buttonLabels) {
+			JButton button = new JButton(label);
+			button.addActionListener(this);
+			buttonPanel.add(button);
+		}
+
+		JButton saveButton = new JButton("保存");
+		saveButton.addActionListener(this);
+		JButton copyButton = new JButton("复制");
+		copyButton.addActionListener(this);
+		JButton clearButton = new JButton("清除");
+		clearButton.addActionListener(this);
+
+		buttonPanel.add(saveButton);
+		buttonPanel.add(copyButton);
+		buttonPanel.add(clearButton);
+
+		add(buttonPanel, BorderLayout.CENTER);
+
+		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+		setSize(300, 400);
+		setVisible(true);
+	}
+
+	@Override
+	public void actionPerformed(ActionEvent e) {
+		String command = e.getActionCommand();
+
+		if (command.equals("保存")) {
+			saveHistoryToFile();
+		} else if (command.equals("复制")) {
+			copyToClipboard();
+		} else if (command.equals("清除")) {
+			clearHistory();
+		} else if (Character.isDigit(command.charAt(0)) || command.equals(".")) {
+			displayField.setText(displayField.getText() + command);
+		} else if (command.equals("=")) {
+			calculate();
+		} else {
+			// 运算符
+			num1 = Double.parseDouble(displayField.getText());
+			operator = command;
+			displayField.setText("");
+		}
+	}
+
+	private void calculate() {
+		num2 = Double.parseDouble(displayField.getText());
+		double result = 0;
+
+		switch (operator) {
+			case "+":
+				result = num1 + num2;
+				break;
+			case "-":
+				result = num1 - num2;
+				break;
+			case "*":
+				result = num1 * num2;
+				break;
+			case "/":
+				if (num2 != 0) {
+					result = num1 / num2;
+				} else {
+					displayField.setText("Error");
+					return;
+				}
+				break;
+		}
+
+		displayField.setText(Double.toString(result));
+
+		String historyEntry = num1 + " " + operator + " " + num2 + " = " + result;
+		historyList.add(historyEntry);
+		updateHistoryArea();
+	}
+
+	private void updateHistoryArea() {
+		historyArea.setText("");
+		for (String entry : historyList) {
+			historyArea.append(entry + "\n");
+		}
+	}
+
+	private void saveHistoryToFile() {
+		JFileChooser fileChooser = new JFileChooser();
+		int result = fileChooser.showSaveDialog(this);
+		if (result == JFileChooser.APPROVE_OPTION) {
+			File file = fileChooser.getSelectedFile();
+			try (FileWriter writer = new FileWriter(file)) {
+				for (String entry : historyList) {
+					writer.write(entry + "\n");
+				}
+				writer.flush();
+				JOptionPane.showMessageDialog(this, "保存成功");
+			} catch (IOException e) {
+				JOptionPane.showMessageDialog(this, "保存失败: " + e.getMessage());
+			}
+		}
+	}
+
+	private void copyToClipboard() {
+		String selectedText = historyArea.getSelectedText();
+		if (selectedText != null && !selectedText.isEmpty()) {
+			Clipboard clipboard = Toolkit.getDefaultToolkit().getSystemClipboard();
+			clipboard.setContents(new StringSelection(selectedText), null);
+		}
+	}
+
+	private void clearHistory() {
+		historyList.clear();
+		updateHistoryArea();
+	}
+
+	public static void main(String[] args) {
+		SwingUtilities.invokeLater(() -> new C1());
+	}
+}