java - Android - Confuse on put source code -

i'm newbie on android. know method oncreate methods in android. i'm freshly learn android in day.

search word 'part z' !! , search word 'end of part z'.

public class mainactivity extends activity {  @override protected void oncreate(bundle savedinstancestate) {     //part z     string consumerkey = "yii";     string consumersecret = "yii";     string accesstoken = "yii";     string accesstokensecret = "yii";         //instantiate re-usable , thread-safe factory     twitterfactory twitterfactory = new twitterfactory();      //instantiate new twitter instance     twitter twitter = twitterfactory.getinstance();      //setup oauth consumer credentials     twitter.setoauthconsumer(consumerkey, consumersecret);      //setup oauth access token     twitter.setoauthaccesstoken(new accesstoken(accesstoken, accesstokensecret));       try {          user user = twitter.verifycredentials();          list<status> statuses = twitter.getmentionstimeline();          system.out.println("showing @" + user.getscreenname() + "'s mentions.");          (status status : statuses) {              system.out.println("@" + status.getuser().getscreenname() + " - " + status.gettext());          }      } catch (twitterexception te) {          te.printstacktrace();          system.out.println("failed timeline: " + te.getmessage());      }     int = 6;     int b = 2;      system.out.println(a+b);     //end of part z     super.oncreate(savedinstancestate);     setcontentview(r.layout.activity_main); }  @override public boolean oncreateoptionsmenu(menu menu) {     // inflate menu; adds items action bar if present.     getmenuinflater().inflate(r.menu.activity_main, menu);     return true; } 

it seem codes in part z doesn't work. put codes in part z wrong ? must put codes in method? can me finish problem ?

try code, change position after part end of z first , second reachable statement in on create function.

@override protected void oncreate(bundle savedinstancestate) {   //end of part z     super.oncreate(savedinstancestate);     setcontentview(r.layout.activity_main); //part z     string consumerkey = "yii";     string consumersecret = "yii";     string accesstoken = "yii";     string accesstokensecret = "yii";         //instantiate re-usable , thread-safe factory     twitterfactory twitterfactory = new twitterfactory();      //instantiate new twitter instance     twitter twitter = twitterfactory.getinstance();      //setup oauth consumer credentials     twitter.setoauthconsumer(consumerkey, consumersecret);      //setup oauth access token     twitter.setoauthaccesstoken(new accesstoken(accesstoken, accesstokensecret));       try {          user user = twitter.verifycredentials();          list<status> statuses = twitter.getmentionstimeline();          system.out.println("showing @" + user.getscreenname() + "'s mentions.");          (status status : statuses) {              system.out.println("@" + status.getuser().getscreenname() + " - " + status.gettext());          }      } catch (twitterexception te) {          te.printstacktrace();          system.out.println("failed timeline: " + te.getmessage());      }     int = 6;     int b = 2;      system.out.println(a+b);  }