java - Error: Main method not found -

error: main method not found in class essence.game, please define main method as: public static void main(string[] args) 

the code:

package essence;  import static org.lwjgl.opengl.gl11.*;  import java.util.list; import java.util.arraylist; import java.util.random;  import org.lwjgl.input.*; import org.lwjgl.opengl.*; import org.lwjgl.*;  public class game{      list<box> shapes = new arraylist<box>(16);      public game(){         try {             display.setdisplaymode(new displaymode(800,600));             display.settitle("essence");             display.create();         } catch (lwjglexception e){             e.printstacktrace();         }          shapes.add(new box(15, 15));         shapes.add(new box(100, 150));          glmatrixmode(gl_projection);         glloadidentity();         glortho(0, 800, 600, 0, 1, -1);         glmatrixmode(gl_modelview);          while(!display.iscloserequested()){              glclear(gl_color_buffer_bit);              if(keyboard.iskeydown(keyboard.key_escape)){                 display.destroy();                 system.exit(0);             }              (box box : shapes) {                 box.draw();             }              display.update();             display.sync(60);         }         display.destroy();     }      private static class box {         public boolean selected = false;         public int x, y;         private float colorred, colorblue, colorgreen;          box (int x, int y){             this.x = x;             this.y = y;              random randomgenerator = new random();              colorred = randomgenerator.nextfloat();             colorblue = randomgenerator.nextfloat();             colorgreen = randomgenerator.nextfloat();            }          boolean inbounds(int mousex, int mousey){             if(mousex > x && mousex < x + 50 && mousey > y && mousey < y + 50)                 return true;             else                 return false;         }          void randomizecolors(){             random randomgenerator = new random();              colorred = randomgenerator.nextfloat();             colorblue = randomgenerator.nextfloat();             colorgreen = randomgenerator.nextfloat();            }          void update(int dx, int dy){             x += dx;             y += dy;         }          void draw(){             glcolor3f(colorred, colorgreen, colorblue);              glbegin(gl_quads);             glvertex2f(x, y);             glvertex2f(x + 50, y);             glvertex2f(x + 50, y + 50);             glvertex2f(x, y + 50);             glend();         }      }     public static void main(string[] args) {            new game();     } } 

now let's change to:

package essence;  public class game{      public static void main(string[] args) {      } } 

it still give same error. checked folder layout, confirmed eclipse\data\workspace\essence\src\essence , eclipse\data\workspace\essence\bin\essence

it cannot java installation, because other projects work fine. here's screenshot of project within eclipse:

http://gyazo.com/296d53b33fa2619ca300c8a896d097dc

what cause of error , way fix it?

it happens me well. restarting compiler fix problem. example, if running eclipse, restart eclipse.