题解 | #截取字符串#
截取字符串
http://www.nowcoder.com/practice/a30bbc1a0aca4c27b86dd88868de4a4a
import java.util.Scanner;
public class Main {
public static void main(String[] args) {
Scanner in = new Scanner(System.in);
String s = in.nextLine();
int n = in.nextInt();
System.out.print(s.substring(0,n));
}
}
有没有加锁，要是你们同时加会出现库存为-1吗？
