Android Attempt to invoke virtual method 'int java.lang.Integer.intValue()' on a null object hataso

hangilerisecildi1 = Integer.toString(bulunanyerindex) + Integer.toString(bulunanyerrindex);
hangilerisecildi2 = Integer.toString(bulunanyerindex) + Integer.toString(bulunanyerrindex-1);
hangilerisecildi3 = Integer.toString(bulunanyerindex) + Integer.toString(bulunanyerrindex-2);
hangilerisecildi4 = Integer.toString(bulunanyerindex) + Integer.toString(bulunanyerrindex-3);

Log.w("Dikkatt", hangilerisecildi1);

bulmacakelime1 = (TextView)findViewById(satirlar.get([b]Integer.getInteger[/b](hangilerisecildi1)));
bulmacakelime2 = (TextView)findViewById(satirlar.get(Integer.getInteger(hangilerisecildi2)));
bulmacakelime3 = (TextView)findViewById(satirlar.get(Integer.getInteger(hangilerisecildi3)));
bulmacakelime4 = (TextView)findViewById(satirlar.get(Integer.getInteger(hangilerisecildi4)));

W/Dikkatt ( 5754): 45

D/AndroidRuntime( 5754): Shutting down VM

E/AndroidRuntime( 5754): FATAL EXCEPTION: main

E/AndroidRuntime( 5754): Process: com.example.x_ren.dnm, PID: 5754

E/AndroidRuntime( 5754): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.x_ren.dnm/com.example.x_ren.dnm.sayitahmin}: java.lang.NullPointerException: Attempt to invoke virtual method 'int java.lang.Integer.intValue()' on a null object reference

E/AndroidRuntime( 5754): 	at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2325)

E/AndroidRuntime( 5754): 	at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2387)

E/AndroidRuntime( 5754): 	at android.app.ActivityThread.access$800(ActivityThread.java:151)

E/AndroidRuntime( 5754): 	at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1303)

E/AndroidRuntime( 5754): 	at android.os.Handler.dispatchMessage(Handler.java:102)

E/AndroidRuntime( 5754): 	at android.os.Looper.loop(Looper.java:135)

E/AndroidRuntime( 5754): 	at android.app.ActivityThread.main(ActivityThread.java:5254)

E/AndroidRuntime( 5754): 	at java.lang.reflect.Method.invoke(Native Method)

E/AndroidRuntime( 5754): 	at java.lang.reflect.Method.invoke(Method.java:372)

E/AndroidRuntime( 5754): 	at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)

E/AndroidRuntime( 5754): 	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)

E/AndroidRuntime( 5754): Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'int java.lang.Integer.intValue()' on a null object reference

E/AndroidRuntime( 5754): 	at com.example.x_ren.dnm.sayitahmin.onCreate(sayitahmin.java:244)

E/AndroidRuntime( 5754): 	at android.app.Activity.performCreate(Activity.java:5990)

E/AndroidRuntime( 5754): 	at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1106)

E/AndroidRuntime( 5754): 	at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2278)

E/AndroidRuntime( 5754): 	... 10 more