为什么输入密码错误不能循环,求指导
import java.util.Scanner;
public class w123 {
public static void main(String args[]) {
int mima=123456;
st1:{
System.out.println("请输入旧密码:");
Scanner reader2=new Scanner(System.in);
int jiumima=reader2.nextInt();
if(jiumima==mima)
{
System.out.println("请输入新密码:");
Scanner reader1=new Scanner(System.in);
mima=reader1.nextInt();
System.out.println("修改密码成功");
}
else {
System.out.println("输入密码与旧密码不匹配");
break st1;
}}
}}