if (knowssector && (this.sectorx == sectorx) && (this.sectory == sectory))
if (((sectorx < 0) && (sectory < 0)) || (knowssector && (this.sectorx == sectorx) && (this.sectory == sectory)))
        public void setSector(int sectorx, int sectory)        {            if (knowssector && (this.sectorx == sectorx)                && (this.sectory == sectory))            	knowssector = false;            else            {            	this.knowssector = true;                this.sectorx = sectorx;                this.sectory = sectory;            }            sectorProps.setEnabled(knowssector);        }