题解 | #截取字符串#

字符串截取和内容读取

import java.util.*;
public class Main{
    public static void main(String [] args){
        getSubstring();
    }
    public static void getSubstring(){
        Scanner scan = new Scanner(System.in);
        while(scan.hasNext()){
            String str = scan.next();
            int k = scan.nextInt();
            System.out.println(str.substring(0,k));
        }
    }
}