Java作业

import java.util.*;
public class homework3{
    public static void main(String[]arg){
Scanner a = new Scanner(System.in);
System.out.println("请输入b=");
String b =a.next();
System.out.println("请输入c=");
String c =a.next();
String m =b;
b =c;
c=m;
System.out.println("b,c两值交换，b="+b+",c="+c);
    }
}