java去掉第一个字符

public class Main {
    public static void main(String[] args) {
        String str = "Hello";
        String result = str.substring(1);
        System.out.println(result);  // 输出: ello
    }
}

public class Main {
    public static void main(String[] args) {
        String str = "Hello";
        StringBuilder sb = new StringBuilder(str);
        sb.deleteCharAt(0);
        String result = sb.toString();
        System.out.println(result);  // 输出: ello
    }
}

public class Main {
    public static void main(String[] args) {
        String str = "Hello";
        String result = str.replaceAll("^.", "");
        System.out.println(result);  // 输出: ello
    }
}