java - Libgdx game Runs perfect in Eclipse, doesn't even open when Exported -

i creating game in java, using libgdx. worked fine when compiled until added layers tiled map. still runs fine when ran eclipse when compile runnable jar, not open. commented out layers , ran perfect again, have no idea causing issue.

here stack:

exception in thread "lwjgl application" java.lang.nullpointerexception @ com.mygdx.game.game_screen.render(game_screen.java:181) @ com.badlogic.gdx.game.render(game.java:46) @ com.badlogic.gdx.backends.lwjgl.lwjglapplication.mainloop(lwjglapplication.java:‌​215) @ com.badlogic.gdx.backends.lwjgl.lwjglapplication$1.run(lwjglapplication.java:120‌​) 

and here code:

package com.mygdx.game;  import com.badlogic.gdx.gdx; import com.badlogic.gdx.input; import com.badlogic.gdx.screen; import com.badlogic.gdx.graphics.gl20; import com.badlogic.gdx.graphics.orthographiccamera; import com.badlogic.gdx.graphics.texture; import com.badlogic.gdx.graphics.g2d.animation; import com.badlogic.gdx.graphics.g2d.spritebatch; import com.badlogic.gdx.graphics.g2d.textureregion; import com.badlogic.gdx.maps.tiled.tiledmap; import com.badlogic.gdx.maps.tiled.tiledmaptilelayer; import com.badlogic.gdx.maps.tiled.tiledmaptilelayer.cell; import com.badlogic.gdx.maps.tiled.tmxmaploader; import com.badlogic.gdx.maps.tiled.renderers.orthogonaltiledmaprenderer;  public class game_screen implements screen{ private tiledmap map; private orthogonaltiledmaprenderer  renderer; orthographiccamera camera; private static final int        frame_cols = 4;         // #1 private static final int        frame_rows = 4;         // #2   animation                       walkanimationup;          // #3 animation                       walkanimationupidle;          // #3 animation                       walkanimationdown;          // #3 animation                       walkanimationdownidle;          // #3 animation                       walkanimationleft;          // #3 animation                       walkanimationleftidle;          // #3 animation                       walkanimationright;          // #3 animation                       walkanimationrightidle;          // #3   cell cellright; int blockedright = 0; cell cellleft; int blockedleft = 0; cell cellup; int blockedup = 1; cell celldown; int blockeddown = 1;  int cellx; int celly; int[] layers = {1,2,3};   texture                         walksheet;              // #4 textureregion[]                 walkframesup;             // #5 textureregion[]                 walkframesupidle;             // #5 textureregion[]                 walkframesdown;             // #5 textureregion[]                 walkframesdownidle;             // #5 textureregion[]                 walkframesleft;             // #5 textureregion[]                 walkframesleftidle;             // #5 textureregion[]                 walkframesright; textureregion[]                 walkframesrightidle;  int                             boundaryxleft = 0; int                             boundaryydown = 0; int                             boundaryxright = 6720; int                             boundaryyup = 4032; mygdxgame                       game; spritebatch                     spritebatch;            // #6 textureregion                   currentframe;           // #7 int                             spritex = 0; int                             spritey = 0; int                             newx = 0; int                             newy = 0; int                             lastkey = 0; int                             currentkey = 0; int                             speed;  float                       statetime;                                        // #8  boolean                         pause = false; tiledmaptilelayer               layer; string collisionlayer;  public game_screen(mygdxgame game) {     this.game = game;     tmxmaploader loader = new tmxmaploader();     map = loader.load("actualmap.tmx");     renderer = new orthogonaltiledmaprenderer(map);     camera = new orthographiccamera();     camera.settoortho(false, 1920, 1080);     camera.position.set(spritex,spritey, statetime);     walksheet = new texture(gdx.files.internal("newsprite.png")); // #9     textureregion[][] tmp = textureregion.split(walksheet, walksheet.getwidth()/frame_cols, walksheet.getheight()/frame_rows);              // #10     walkframesright = new textureregion[frame_cols * frame_rows];     walkframesrightidle = new textureregion[frame_cols * frame_rows];     walkframesleft = new textureregion[frame_cols * frame_rows];     walkframesleftidle = new textureregion[frame_cols * frame_rows];     walkframesup = new textureregion[frame_cols * frame_rows];     walkframesupidle = new textureregion[frame_cols * frame_rows];     walkframesdown = new textureregion[frame_cols * frame_rows];     walkframesdownidle = new textureregion[frame_cols * frame_rows];     collisionlayer = "collision";      speed = 2;     ;     int index = 0;     (int = 0; < frame_rows; i++) {         (int j = 0; j < frame_cols; j++) {             walkframesright[index++] = tmp[2][j];         }     }     index = 0;     (int = 0; < frame_rows; i++) {         (int j = 0; j < frame_cols; j++) {             walkframesrightidle[index++] = tmp[2][1];         }     }     index = 0;     (int = 0; < frame_rows; i++) {         (int j = 0; j < frame_cols; j++) {             walkframesleft[index++] = tmp[1][j];         }     }     index = 0;     (int = 0; < frame_rows; i++) {         (int j = 0; j < frame_cols; j++) {             walkframesleftidle[index++] = tmp[1][1];         }     }     index = 0;     (int = 0; < frame_rows; i++) {         (int j = 0; j < frame_cols; j++) {             walkframesup[index++] = tmp[3][j];         }     }     index = 0;     (int = 0; < frame_rows; i++) {         (int j = 0; j < frame_cols; j++) {             walkframesupidle[index++] = tmp[3][1];         }     }      index = 0;     (int = 0; < frame_rows; i++) {         (int j = 0; j < frame_cols; j++) {             walkframesdown[index++] = tmp[0][j];         }     }     index = 0;     (int = 0; < frame_rows; i++) {         (int j = 0; j < frame_cols; j++) {             walkframesdownidle[index++] = tmp[0][1];         }     }       walkanimationright = new animation(0.2f, walkframesright);      // #11     walkanimationrightidle = new animation(0.2f, walkframesrightidle);      // #11     walkanimationleft = new animation(0.2f, walkframesleft);      // #11     walkanimationleftidle = new animation(0.2f, walkframesleftidle);      // #11     walkanimationup = new animation(0.2f, walkframesup);      // #11     walkanimationupidle = new animation(0.2f, walkframesupidle);      // #11     walkanimationdown = new animation(0.2f, walkframesdown);      // #11     walkanimationdownidle = new animation(0.2f, walkframesdownidle);      // #11     spritebatch = new spritebatch();                // #12     statetime = 0f;                         // #13  }    @override public void render(float delta) {     layer = (tiledmaptilelayer) map.getlayers().get(collisionlayer);     camera.update();     spritebatch.setprojectionmatrix(camera.combined);     gdx.gl.glclearcolor(1, 1, 1, 1);     gdx.gl.glclear(gl20.gl_color_buffer_bit);                        // #14     statetime += gdx.graphics.getdeltatime();           // #15       cellx = spritex/64;     celly = spritey/64;     cellup = layer.getcell(cellx, celly+1);     celldown = layer.getcell(cellx, celly-1);     cellright = layer.getcell(cellx+1, celly);     cellleft = layer.getcell(cellx-1, celly);     blockedup = integer.parseint((string) cellup.gettile().getproperties().get("blocked"));     if(celly != 0)     blockeddown = integer.parseint((string) celldown.gettile().getproperties().get("blocked"));     if(cellx != 0)     blockedleft = integer.parseint((string) cellleft.gettile().getproperties().get("blocked"));     blockedright = integer.parseint((string) cellright.gettile().getproperties().get("blocked"));        if(gdx.input.iskeypressed(input.keys.left) && spritex == newx && spritey == newy && spritex > boundaryxleft && blockedleft == 0)     {         lastkey = 1;         newx-=64;         currentkey = 1;     }     else if(gdx.input.iskeypressed(input.keys.right) && spritex == newx && spritey == newy && spritex < boundaryxright && blockedright == 0 )     {         lastkey = 0;         newx+=64;         currentkey = 0;     }     else if(gdx.input.iskeypressed(input.keys.up) && spritey == newy && spritex == newx && spritey < boundaryyup  && blockedup == 0)     {         lastkey = 2;         newy+=64;         currentkey = 2;     }     else if(gdx.input.iskeypressed(input.keys.down) && spritey == newy && spritex == newx && spritey > boundaryydown && blockeddown == 0 )     {         lastkey = 3;         newy-=64;         currentkey = 3;     }     else if(spritex == newx && spritey == newy)     {         currentkey = 4;     }      if(gdx.input.iskeypressed(input.keys.down) && spritey == newy && spritex == newx && spritey > boundaryydown && blockeddown == 2 && lastkey == 3)     {         lastkey = 3;         newy-=128;         currentkey = 3;         if(collisionlayer.equals("collision"))         {             collisionlayer = "inside";             layers[1] = 4;             layers[2] = 4;          }         else if(collisionlayer.equals("inside"))         {             collisionlayer = "collision";             layers[1] = 2;             layers[2] = 3;         }     }     if(gdx.input.iskeypressed(input.keys.up) && spritey == newy && spritex == newx && spritey < boundaryyup && blockedup == 2 && lastkey == 2)     {         lastkey = 2;         newy+=128;         currentkey = 2;         if(collisionlayer.equals("collision"))         {             collisionlayer = "inside";             layers[1] = 4;             layers[2] = 4;          }         else if(collisionlayer.equals("inside"))         {             collisionlayer = "collision";             layers[1] = 2;             layers[2] = 3;         }       }      if(gdx.input.iskeypressed(input.keys.left) && lastkey != 1 && spritey == newy && spritex == newx )     {         lastkey = 1;     }      if(gdx.input.iskeypressed(input.keys.right) && lastkey != 0 && spritey == newy && spritex == newx )     {         lastkey = 0;     }      if(gdx.input.iskeypressed(input.keys.up) && lastkey != 2 && spritey == newy && spritex == newx )     {         lastkey = 2;     }      if(gdx.input.iskeypressed(input.keys.down) && lastkey != 3 && spritey == newy && spritex == newx )     {         lastkey = 3;     }       if(gdx.input.iskeyjustpressed(input.keys.escape))     {     gdx.app.exit();       }        if(spritex < newx)         spritex+=(speed);     if(spritex > newx)         spritex-=(speed);     if(spritey < newy)         spritey+=(speed);     if(spritey > newy)         spritey-=(speed);        if(lastkey == 0 && spritex != newx)     {;         currentframe = walkanimationright.getkeyframe(statetime, true);  // #16     }     else if(lastkey == 0 && spritex == newx && currentkey == 4)     {         currentframe = walkanimationrightidle.getkeyframe(statetime, true);  // #16      }        if(lastkey == 1 && spritex != newx)     {         currentframe = walkanimationleft.getkeyframe(statetime, true); // #16     }     else if (lastkey == 1 && spritex == newx && currentkey == 4)        {         currentframe = walkanimationleftidle.getkeyframe(statetime, true); // #16     }      if(lastkey == 2 && spritey != newy)     {         currentframe = walkanimationup.getkeyframe(statetime, true);  // #16     }     else if (lastkey == 2 && spritey == newy && currentkey == 4)        {         currentframe = walkanimationupidle.getkeyframe(statetime, true); // #16     }       if(lastkey == 3 && spritey != newy)     {         currentframe = walkanimationdown.getkeyframe(statetime, true);  // #16     }        else if (lastkey == 3 && spritey == newy && currentkey == 4)        {         currentframe = walkanimationdownidle.getkeyframe(statetime, true); // #16     }      camera.position.set(spritex, spritey, 0);     renderer.setview(camera);     renderer.render(layers);;      spritebatch.begin();     spritebatch.draw(currentframe, spritex, spritey);             // #17     spritebatch.end();  } @override public void dispose() {     // todo auto-generated method stub     spritebatch.dispose();     renderer.dispose();     map.dispose();    } @override public void resize(int width, int height) {     // todo auto-generated method stub  }  @override public void pause() {     // todo auto-generated method stub  }  @override public void resume() {     // todo auto-generated method stub  }         @override public void hide() {     // todo auto-generated method stub  }  @override public void show() {     // todo auto-generated method stub  } }