Drawing dynamically multiple lines in java applet -

when try draw single line in shape , don't know problem. want draw multiple lines store points of old lines in array list repainted each time draw new line.

public class lines11 extends java.applet.applet         implements mouselistener, mousemotionlistener {     private final int maxlines = 10;     private arraylist<point> starts;     private arraylist<point> ends;     private point anchor;     private point currentpoint;     private int currlines;     public void init() {         starts = new arraylist<point>();         ends = new arraylist<point>();         currlines = 0;         this.addmouselistener(this);         this.addmousemotionlistener(this);     }     public void mousepressed(mouseevent e)     {         anchor = new point(e.getx(),e.gety());         repaint();     }       public void mousedragged(mouseevent e)     {         currentpoint = new point(e.getx(),e.gety());         addline(e.getx(),e.gety());         repaint();     }     public void mousemoved(mouseevent e) { }      public void mousereleased(mouseevent e)     {      }     public void mouseclicked(mouseevent e) { }     public void mouseentered(mouseevent e) { }     public void mouseexited(mouseevent e) { }     public void paint(graphics g) {     (int = 0 ; < starts.size()&& i<ends.size() ; i++)         g.drawline(starts.get(i).x,starts.get(i).y,         ends.get(i).x,ends.get(i).y);      }     void addline(int x, int y) {         starts.add(currlines,anchor);         ends.add(currlines,currentpoint);         currlines++;         currentpoint = null;        repaint();     } }