java - TiledMapTile set texture region gives NullPointerException -

i'm having trouble setting texture region tiledmaptile. gives me nullpointerexception , have no idea why.

here code:

tiledmaptile cointile;  public void show () {     maptexture1 = new texture(gdx.files.internal("maps/other/texture1.png"));      textureregion maptexture1region = new textureregion(maptexture1, 32, 0, 16, 16);     cointile.settextureregion(maptexture1region); } 

and here error:

04-09 21:57:18.222: e/androidruntime(7792): java.lang.nullpointerexception
04-09 21:57:18.222: e/androidruntime(7792): @ com.never.mind.screens.gamescreen.show(gamescreen.java:225)

which leads line:

cointile.settextureregion(maptexture1region); 

usually, nullpointerexception happens when did not initialize in code.

since did not provide full code, give suggestions. did

maptexture1 = new texture(gdx.files.internal("maps/other/texture1.png")); 

you should also

cointile = new tiledmaptile () { @override public int getid() {     return 0; }  @override public void setid(int id) {  }  @override public blendmode getblendmode() {     return null; }  @override public void setblendmode(blendmode blendmode) {  }  @override public textureregion gettextureregion() {     return null; }  @override public void settextureregion(textureregion textureregion) {  }  @override public float getoffsetx() {     return 0; }  @override public void setoffsetx(float offsetx) {  }  @override public float getoffsety() {     return 0; }  @override public void setoffsety(float offsety) {  }  @override public mapproperties getproperties() {     return null; }  } 

by way read api spcific paremeters.

since new java read here grasp of nullpointers