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import javax.swing.*;
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import java.awt.*;
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import java.awt.event.ActionEvent;
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import java.awt.event.ActionListener;
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public class uml10_10 {
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// 将任意进制字符串转换为十进制整数
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public static int toDecimal(String number, int base) {
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int decimal = 0;
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int power = 0;
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// 从字符串的末尾开始处理
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for (int i = number.length() - 1; i >= 0; i--) {
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char digit = number.charAt(i);
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// 如果是数字字符（0-9）
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if (Character.isDigit(digit)) {
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int value = Character.getNumericValue(digit);
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decimal += value * Math.pow(base, power);
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}
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// 如果是字母字符（A-F 或 a-f），表示10-15
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else if (Character.isLetter(digit)) {
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char upperDigit = Character.toUpperCase(digit);
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int value = upperDigit - 'A' + 10;
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decimal += value * Math.pow(base, power);
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} else {
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throw new IllegalArgumentException("Invalid character in number: " + digit);
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}
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power++;
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}
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return decimal;
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}
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// 将十进制整数转换为任意进制字符串
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public static String fromDecimal(int number, int base) {
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if (number == 0) {
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return "0";
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}
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StringBuilder result = new StringBuilder();
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char[] digits = "0123456789ABCDEF".toCharArray(); // 支持到16进制
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boolean isNegative = number < 0;
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if (isNegative) {
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number = -number;
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}
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while (number > 0) {
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int remainder = number % base;
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result.insert(0, digits[remainder]);
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number /= base;
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}
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if (isNegative) {
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result.insert(0, '-');
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}
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return result.toString();
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}
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public static void main(String[] args) {
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// 创建窗口
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JFrame frame = new JFrame("进制转换器");
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frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
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frame.setSize(400, 300);
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frame.setLayout(new GridLayout(5, 2)); // 网格布局
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// 创建组件
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JLabel sourceBaseLabel = new JLabel("源进制（2-16）：");
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JTextField sourceBaseField = new JTextField();
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JLabel targetBaseLabel = new JLabel("目标进制（2-16）：");
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JTextField targetBaseField = new JTextField();
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JLabel numberLabel = new JLabel("要转换的数字：");
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JTextField numberField = new JTextField();
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JButton convertButton = new JButton("转换");
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JLabel resultLabel = new JLabel("转换结果：");
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// 添加组件到窗口
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frame.add(sourceBaseLabel);
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frame.add(sourceBaseField);
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frame.add(targetBaseLabel);
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frame.add(targetBaseField);
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frame.add(numberLabel);
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frame.add(numberField);
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frame.add(convertButton);
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frame.add(resultLabel);
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// 添加按钮事件处理
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convertButton.addActionListener(new ActionListener() {
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@Override
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public void actionPerformed(ActionEvent e) {
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try {
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int sourceBase = Integer.parseInt(sourceBaseField.getText().trim());
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int targetBase = Integer.parseInt(targetBaseField.getText().trim());
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String number = numberField.getText().trim();
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// 验证源进制数字是否有效
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for (char c : number.toCharArray()) {
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if (!Character.isDigit(c) &&
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!(Character.isLetter(c) && (Character.toUpperCase(c) >= 'A' && Character.toUpperCase(c) <= 'F') && sourceBase > 10)) {
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throw new IllegalArgumentException("Invalid character in source base number: " + c);
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}
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}
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// 将源进制数字转换为十进制
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int decimalNumber = toDecimal(number, sourceBase);
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// 将十进制数字转换为目标进制
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String convertedNumber = fromDecimal(decimalNumber, targetBase);
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// 显示结果
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resultLabel.setText("转换后的" + targetBase + "进制数字是：" + convertedNumber);
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} catch (IllegalArgumentException ex) {
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JOptionPane.showMessageDialog(frame, "错误: " + ex.getMessage(), "输入错误", JOptionPane.ERROR_MESSAGE);
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}
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}
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});
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// 显示窗口
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frame.setVisible(true);
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}
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}
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