截取字符串

实现代码：

        public static void main(String[] args) {Scanner scanner = new Scanner(System.in);// 读取字符串 sString s = scanner.nextLine();// 读取整数 kint k = scanner.nextInt();// 截取前 k 个字符String result = s.substring(0, k);// 输出结果System.out.println(result);scanner.close();}