package lang.lang1;
import *;

import

class person{
    private int No;
    String Name,password;
    private float yue;
    void initperson(String newName,String newpassword,int newNo,float newyue){
        Name = newName;
        password = newpassword;
        yue = newyue;
        No = newNo;
    }
    void printperson(){
        System.out.println("户名："+Name);
        System.out.println("账号："+No);
        System.out.println("余额："+yue);
    }
    void examinperson() throws IOException {
        System.out.println("请输入密码");
        BufferedReader str = new BufferedReader(new InputStreamReader(System.in));
        String a = str.readLine();
         System.out.println(a);
        if(a==password){
            printperson();
        }
        else{
            System.out.println("密码错误");
        }
    }
}
public class Bank {

    public static void main(String[] args) throws IOException {
        person wo = new person();
        wo.initperson("张三", "abc", 123456, 5000);
        wo.examinperson();

    }

}
就是简单的输入密码显示信息，输入部分搞不明白

同学这样就可以啦。
class person{
    private int No;
    String Name,password;
    private float yue;
    void initperson(String newName,String newpassword,int newNo,float newyue){
        Name = newName;
        password = newpassword;
        yue = newyue;
        No = newNo;
    }
    void printperson(){
        System.out.println("户名："+Name);
        System.out.println("账号："+No);
        System.out.println("余额："+yue);
    }
    void examinperson() throws IOException {
        System.out.println("请输入密码");
     //   BufferedReader str = new BufferedReader(new InputStreamReader(System.in));
        Scanner str=new Scanner(System.in);
        String a = str.next();
         System.out.println(a);
        if(a.equals(password)){
            printperson();
        }
        else{
            System.out.println("密码错误");
        }
    }
}
public class Bank{

    public static void main(String[] args) throws IOException {
        person wo = new person();
        wo.initperson("张三", "abc", 123456, 5000);
        wo.examinperson();

    }

}
输出结果：请输入密码
abc
abc
户名：张三
账号：123456
余额：5000.0