java - JFrame help - passing value into PaintComponent() -

i've been working on small "game" project while , haven't been able pass value paintcomponent method in way.

here's program. used boolean test parameter, paintcomponent method not consider test true , not paint blue square.

how can fix this? appreciated.

class 1 (swing):

package swing;  import javax.swing.*; import javax.*;  import java.awt.*; import java.awt.event.*;   public class swing {      private static  draw object = new draw();      public static void main(string[] args) {         jframe frame = new jframe("roguelikelike mvp");         frame.setvisible(true);         frame.setfocusable(true);         frame.setsize(500,500);         frame.setdefaultcloseoperation(jframe.exit_on_close);;         frame.add(object);      }  static class move implements keylistener{  public boolean isfocustraversable ( ) { return true; }  public void keypressed(keyevent e) {     int x = 10;     int y = 10;     char c = e.getkeychar();     if(c == 's')         y+=10;     if(c == 'a')         x-=10;     if(c == 'w')         y-=10;     if(c == 'd')         x+=10;      object.setalignmentx(x);     object.setalignmenty(y);  }  public void keyreleased(keyevent e) {} public void keytyped(keyevent e) {}   } } 

class 2 (draw):

package swing;  import javax.swing.*; import java.awt.*;  public class draw extends jpanel {      boolean test = true;      private static final long serialversionuid = 1l;      /*public void passmethod(draw object) {         int x = (int) object.getalignmentx();         int y = (int) object.getalignmenty();     }*/      public void drawing(draw object){         draw thing = new draw();         thing.setx(object.getalignmentx());         int x = 55;         repaint();     }      private void setx(float alignmentx) {         setx((int) alignmentx);      }      private void sety(float alignmenty) {         sety((int) alignmenty);      }      public void paintcomponent(graphics g, boolean test){         super.paintcomponents(g);         //int x = (int)object.getalignmentx();         //int y = (int)object.getalignmenty();         if(test==true)         {             g.setcolor(color.blue);             g.fillrect(getx(),gety(),100,100);         }      } } 

paintcomponent can overloaded, overloaded version won't used paint component. paintcomponent isn't called user, painting routine. instead of overloading method should consider using variable test , reading/updating variable. this:

private boolean test = true;  @override public void paintcomponent(graphics g){     super.paintcomponent(g);      if(test){         //the rest of code     } }