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System.out.println("input the operator:");
String s=sc.next();//String s=sc.nextLine()//为什么这个地方用nextLine()就不行了呢?
sc.next();
String s=sc.nextLine();
import java.util.Scanner;
public class code
{
public static void main(String[] args)
{
Scanner sc = new Scanner(System.in);
int myint = sc.nextInt();
System.out.println("sc.nextInt()"+myint);
System.out.println("------------------------------");
String str2="qweqwe";
System.out.println("str2=sc.nextLine();执行前,str2的值:"+str2);
str2=sc.nextLine();
System.out.println("str2=sc.nextLine();执行后,str2的值:"+str2);
System.out.println("str2.length()为"+str2.length());
}
}