android - Bind service using nested class -

i following tutorial bind service,this code

server

public class server extends service {  ibinder mbinder = new localbinder();  @override public ibinder onbind(intent intent) {     return mbinder; }  public class localbinder extends binder {     public server getserverinstance() {         return server.this;     } }  public string gettime() {     simpledateformat mdateformat = new simpledateformat(             "yyyy-mm-dd hh:mm:ss");     return mdateformat.format(new date());  } } 

client

public class client extends activity {  boolean mbounded; server mserver; textview text; button button;  @override public void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);     setcontentview(r.layout.main);      text = (textview) findviewbyid(r.id.text);     button = (button) findviewbyid(r.id.button);     button.setonclicklistener(new onclicklistener() {          public void onclick(view v) {             text.settext(mserver.gettime());         }     }); }  @override protected void onstart() {     super.onstart();     intent mintent = new intent(this, server.class);     bindservice(mintent, mconnection, bind_auto_create); };  serviceconnection mconnection = new serviceconnection() {      public void onservicedisconnected(componentname name) {         toast.maketext(client.this, "service disconnected", 1000).show();         mbounded = false;         mserver = null;     }      public void onserviceconnected(componentname name, ibinder service) {         toast.maketext(client.this, "service connected", 1000).show();         mbounded = true;         localbinder mlocalbinder = (localbinder) service;         mserver = mlocalbinder.getserverinstance();     } };  @override protected void onstop() {     super.onstop();     if (mbounded) {         unbindservice(mconnection);         mbounded = false;     } }; } 

its working fine.

if change

localbinder mlocalbinder = (localbinder) service;         mserver = mlocalbinder.getserverinstance(); 

to

mserver = new server(); 

it work fine.

so actual need of creating nested localbinder class in server class , create getserverinstance() method getting reference of it, if can directly initialize object using traditional java method new keyword, have seen in other examples.i can't make out it, expert can me?