String字符创输入方法

import java.util.Scanner;

public class Lianxi3{
public static void main(String[]args){
Scanner input=new Scanner (System.in);
String zhanghao="q",mima="q";
System.out.println("请输入QQ号码 ");
zhanghao=input.next();
System.out.println("请输入密码");
mima=input.next();
input.close(); //关闭扫描器
System.out.println(mima);
if(mima.equals("wlc571451995"))
System.out.println("密码输入正确");
else
System.out.println("密码输入错误");

}
}