Java, change boolean from another class -

this question different because it's creating 3d world editor.. @ moment want updated positions of models work..

so i've worked way rather simple problem. in order update scene want have boolean if specific input given , change false true once input given.. problem though input method has in class , don't know how can affect boolean there.. here's code:

public class enginesetup extends game {     public boolean dostuff = true;      public void init()     {            creationtool updatecoords = new creationtool(this);         while(dostuff == true) { updatecoords.environment(); dostuff = false; }     } } 

this happens when engine starts. it's going run environment method in creationtool class once, because after first execution dostuff changes false.

public class creationtool extends gamecomponent {     public void input(float delta)     {            if(input.getkeyup(getcoords))         // change boolean value in enginesetup true     } } 

in creationtool class have input method , getcoords variable enter key.

so idea once hit enter key boolean in enginesetup class set true , environment method being executed once again , boolean changed false again.

how can change boolean value within creationtool class decribed above?

thanks lot help!

edit: i've gotten answers none of them worked..

public class enginesetup extends game {        private static enginesetup instance;     public boolean dostuff = true;      public void init()     {             instance = this;         creationtool updatecoords = new creationtool(this);         while(dostuff == true) { system.out.println("work"); dostuff = false; } }  public class creationtool extends gamecomponent {     public void input(float delta)     {            if(input.getkeyup(getcoords))             { enginesetup.getinstance().dostuff=true; }     } } 

it works first time around when program starts when hit enter nothing happens.

public class enginesetup extends game {        public static boolean dostuff = true;      public void init()     {             creationtool updatecoords = new creationtool(this);         while(dostuff == true) { system.out.println("work"); dostuff = false; } }  public class creationtool extends gamecomponent {     public void input(float delta)     {            if(input.getkeyup(getcoords))             enginesetup.dostuff = true;     } } 

also didn't work, first time around when program start everything's fine when hit enter: nothing..

how fix..?

okay, i've restructured code little , got booleans work way wanted. moved boolean enginesetup class creationtool class, input , change booelans there:

public class engineinput extends game {            public void init()     {                    if(creationtool.dostuff == true) {         system.out.println("updatevegetation "+creationtool.dostuff);                    this.updatevegetation(); // method updates coordinates         } else         if(creationtool.dostuff == false)          system.out.println("updatevegetation "+creationtool.dostuff);                } } 

and in creationtool class can affect boolean:

public class creationtool extends gamecomponent {        public static boolean dostuff = true;      engineinput updatevegetation = new engineinput();      public void input(float delta)     {                    if(dostuff == true) { if(input.getkeyup(getcoords)) { system.out.println(dostuff); dostuff = false; updatevegetation.updatevegetation(); } } else         if(dostuff == false) { if(input.getkeyup(getcoords)) { system.out.println(dostuff); dostuff = true; updatevegetation.updatevegetation(); } }     } } 

thanks help! coordinates being read text file once hit enter key, updated positions still rendered after restarting program, riddle need solve.