Can't call a method from a separate class in Java -

making little mini blog application, setting places hold data. have 3 classes 1 post 1 user , 1 test, named blog. when try call getname(); method in blog class won't run keeps saying needs string, made array of user objects, , input string username spot, , still isn't working.

    public class blog {     public static void main(string []args)     {         user[] userlist = new user[3];         userlist[0] = new user("what.com", "thelegioncrab", "jake parham", "jparham@gmail.com");         userlist[1] = new user("huh.com", "ragglefraggle", "brett hawkins", "bhawkins@gmail.com");         userlist[2] = new user("buh.com", "seanbeast", "sean sweeney", "ssweeney@gmail.com");          for(int counter = 0; counter<userlist.length; counter++)         {             user.getname();         }     } }  public class user {     private string url;      private string username;     private string realname;     private string email;      public user(string url, string username, string realname, string email)     {         this.url = url;         this.username = username;         this.realname = realname;         this.email = email;     }      public void getname(string username)     {         system.out.println(username);     } } 

public void getname(string username) {     system.out.println(username); } 

here function require string. why need string run. if want print username of current user object in loop use this.

public void getname() {     system.out.println(this.username); } 

this refer current user object in loop. loop.

    for(int counter = 0; counter<userlist.length; counter++)     {         user.getname();     } 

you use user class meanwhile create variable as

user[] userlist = new user[3]; 

to print var, should use var.

    for(int counter = 0; counter<userlist.length; counter++)     {         userlist[counter].getname();     }