graphics - Random shape generator in Java -

i trying build program @ least 10 shapes created randomly , given random places. far have this:

import javax.swing.jframe;  public class randomshapeviewer {     public static void main(string[] args)     {         jframe frame = new jframe();          final int frame_width = 300;         final int frame_height = 400;          frame.setsize(frame_width, frame_height);         frame.settitle("randomshapeviewer");         frame.setdefaultcloseoperation(jframe.exit_on_close);          randomshapescomponent component = new randomshapescomponent();         frame.add(component);          frame.setvisible(true);     } } 

and

import javax.swing.jcomponent; import java.awt.graphics; import java.awt.graphics2d;  public class randomshapescomponent extends jcomponent {     public void paintcomponent(graphics g)     {         graphics2d g2 = (graphics2d) g;         randomshapegenerator r = new randomshapegenerator(getwidth(), getheight());          (int = 1; <= 10; i++)            g2.draw(r.graphics());     } } 

and

import java.awt.shape; import java.awt.geom.ellipse2d; import java.awt.geom.line2d; import java.awt.geom.rectangle2d; import java.util.random; import java.awt.*; import java.awt.event.*;  public class randomshapegenerator {      int width, height;     random ran = new random();      public randomshapegenerator(int i, int j)     {         int width = i;         int height = j;     }      public void paintcomponent(graphics g)     {         switch(ran.nextint(10)) {             default:             case 0:   g.drawoval(10, 20, 10, 20);             case 1:   g.drawline(100, 100, 150, 150);             case 2:   g.drawrect(30,40,30,40);         }     } } 

now have couple of questions:

1. is possible draw multiple lines in 1 case (and creating triangle) , if how go doing this?
2. i error message: 1 error found: file: d:\downloads\wallpaper\randomshapescomponent.java [line: 14] error: cannot find symbol symbol: method graphics() location: variable r of type randomshapegenerator
3. furthermore follow-up question on first question: how able fill in oval , rectangle, etc. solid color?

is possible draw multiple lines in 1 case (and creating triangle)

of course. call drawline 3 times, coordinates of triangle. don't forget break statement in each of cases.

i error message 1 error found

you don't have of necessary imports, or have typo in source code. sure graphics() spelled upper-case letter?

how able fill in oval , rectangle etc solid color.

use fillrectangle and/or filloval apis.