阅读以下说明和java代码，将应填入(n)处的字句写在对应栏内。

[说明]

本程序中预设了若干个用户名和口令。用户输入正确的用户名后，可以查找对应的口令，一旦输入结束标记“end”，程序结束。

[Java代码]

import java. io. *:

public class User {

public String user;

public Siring pass;

public User() { }

public User( String u,String p) {

user=u;

pass=p;

}

public String (1) () { return this. user; }

public String (2) () { return this. pass; }

public static void main(String[] args) {

User ua[]={new User("Li","123456"), new User("wang","654321"),

new User("Song","666666")};

while(true) {

InputStreamReader reader = new InputStreamReader(System. in);

BufferedReader inpul = new BnfferedReader(reader);

System. out. print("Enter your name:");

String name = null;

try { name = input. readLine();}

catch (IOException ex) {}

if((3)) break;

int i;

for (i=0;i＜3;i++) {

if (name. equals(ua[i]. getUser())){

System. out. println("密码:"+ua[i].getPass());

(4);

}

}

if ((5)) System. out. println("该用户不存在!");

}

}

}