drag.txt

java绘图程序

if(ellipse!=null){
			
			x2=e.getX();
			y2=e.getY();
	     	ellipse.setFrame(x2 - SIDELENGTH / 2,y2 - SIDELENGTH / 2,SIDELENGTH,SIDELENGTH);
			repaint();
		
            }
            
            if(line!=null){
            	x2=e.getX();
            	y2=e.getY();
            	line.setLine(x1,y1,x2,y2);
            	repaint();
            }
            if(current!=null){
            	x2=e.getX();
            	y2=e.getY();
            	current.setFrame(x - SIDELENGTH / 2,y - SIDELENGTH / 2,SIDELENGTH,SIDELENGTH);
            	repaint();
            }