java - How to output one element of an Array List? -

for assignment have demonstrate removing user array list (done) , going through array list using iterator , instead of removing user list, must output 1 specific user list. question similar other question removing element different in way i'm asking how iterate through list , output 1 user opposed removing user form list. have tried using while loop includes if statement , uses .next() function doesn't seem outputting 1 user still outputs users. share relevant code reproducing part of program:

main class (used call method)

package main;  public class main{  public static void main(string[] args) {      system.out.println("***********iteration of administrators***********");     usergroup2 usergroupobject2 = new usergroup2(); (user secondusergroup : usergroupobject2.getusergroup()) {    usergroupobject2.getuseriterator();    system.out.println(secondusergroup.tostring());  }       } } } 

usergroup2 class (where array list has been created)

package main; import java.util.arraylist; import java.util.iterator;  public class usergroup2 implements iterable<usergroup2> {  arraylist<user> administrators = new arraylist<>();  public usergroup2() {   adduser(new user("lnb1g16", "student", "lee"));   adduser(new user("hpf1g17", "staff", "harry"));   adduser(new user("jks1g25", "student", "jordon"));   adduser(new user("ohw1237", "admin", "oliver"));   adduser(new user("ahs1213", "student", "jordon"));   adduser(new user("bdh1285", "admin", "bob"));   adduser(new user("tqn1294", "student", "taylor")); } public void adduser(user inuser) {   //usergroup.add(new user("leeb123", "staff", "lee"));   administrators.add(inuser); } public arraylist<user> getusergroup() {     return administrators; } public void getuseriterator()  {     iterator<user> it2 = administrators.iterator();         while (it2.hasnext()) {         user xxx = it2.next();          if (xxx.getusername().equals("jks1g25")) {              it2.next();         }     } } } 

user class (details users)

package main;  class user {    string username;   string usertype;   string name;       user(string username, string usertype, string name) {      this.username = username;     this.usertype = usertype;     this.name = name;     }    public string getusername() {       return username;   }    public string getusertype() {       return usertype;   }     public string getname() {       return name;   }    public string setusertype(string admin) {       return usertype = "admin";   }   @override public string tostring() {     return username + " " + usertype; }     } 

i've tried searching online how cannot seem find source specifies how output 1 element of array list therefore may others might stuck on same issue, appreciated, thanks.

• you should try make cade simple possible.

• you not want implement iterable, if need able iterate on class iterator should implement. (see : https://stackoverflow.com/a/22357335/4088809)

• make members of class private ensure encapsulation, , if need access use appropriate getter.

user.java

package main;   public class user {   //set members of class private   //this ensure encapsulation    private string username;   private string usertype;   private string name;    user(string username, string usertype, string name) {     this.username = username;     this.usertype = usertype;     this.name = name;   }    public string getusername() {     return username;   }    public string getusertype() {     return usertype;   }    public string getname() {     return name;   }    //set usertype using admin parameter   //instead of string admin   //otherwise users admin   public string setusertype(string admin) {     return usertype = admin;   }    @override   public string tostring() {     return username + " " + usertype;   }     } 

usergroup2.java

package main;  import java.util.arraylist;   //no need implement iterator, since add element  //to arraylist , nothing else. public class usergroup2 {  private arraylist<user> administrators = new arraylist<>();  public usergroup2() {   adduser(new user("lnb1g16", "student", "lee"));   adduser(new user("hpf1g17", "staff", "harry"));   adduser(new user("jks1g25", "student", "jordon"));   adduser(new user("ohw1237", "admin", "oliver"));   adduser(new user("ahs1213", "student", "jordon"));   adduser(new user("bdh1285", "admin", "bob"));   adduser(new user("tqn1294", "student", "taylor")); }  public void adduser(user inuser) {   this.administrators.add(inuser); }  public arraylist<user> getadministrators() {     return administrators; }  }  

main.java

package main;  public class main{  public static void main(string[] args) {     system.out.println("***********iteration of administrators***********");      //create user group     usergroup2 usergroupobject2 = new usergroup2();      //get , iterate on arraylist inside usergroup2     (user currentuser : usergroupobject2.getadministrators()) {       //compare current user username searching       if (currentuser.getusername().equals("jks1g25"))         system.out.println(currentuser.tostring());     }   } }