Java获取随机字符

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于 2024-08-28 09:13:54 发布

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分类专栏： java 文章标签： java 开发语言算法

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private static final String CHAR_SET = "abcdefghijklmnopqrstuvwxyz";
private static final Random RANDOM = new Random();

public static String generateRandomPassword(int length) {
        if (length <= 0) {
            throw new IllegalArgumentException("Length must be a positive integer.");
        }
        StringBuilder password = new StringBuilder(length);
        for (int i = 0; i < length; i++) {
            int index = RANDOM.nextInt(CHAR_SET.length());
            password.append(CHAR_SET.charAt(index));
        }
        return password.toString();
    }



public static void main(String[] args) {
        int passwordLength = 9; // 你可以根据需要修改密码长度
        String randomPassword = generateRandomPassword(passwordLength);
        System.out.println("Generated Password: " + randomPassword);

    }