Draw circle and rectangle in java -


i new java , want draw circle , rectangle using java code. did write code purpose , tried @ own. on panel appearing , shapes not appearing.

code of "mypanel" given below 

import javax.swing.*; import java.awt.*; public class mypanel extends jpanel{     public void paincomponent(graphics g){           super.paintcomponent(g);         graphics2d g2 = (graphics2d)g;         g2.drawrect(20,20,20,20);         g2.setcolor(color.blue);         g2.filloval(50,20,20,20);         g2.drawstring("hello world", 120, 50);     }//end paincomponent  }//end test class

cdoe of driver class "test" given below.

import javax.swing.*; import java.awt.*; public class test{     jframe f;      mypanel p;      public test(){         f = new jframe();         container c = f.getcontentpane();         c.setlayout(new borderlayout());          p = new mypanel();          c.add(p, borderlayout.center);         f.setsize(400,400);         f.setvisible(true);         f.setdefaultcloseoperation(jframe.exit_on_close);     }//end of constructor     public static void main(string args[]){         test t = new test();     } }

and per knowledge when frame becomes visible through paintchildren() method panel should become visible become visible panel call paintcomponent() method custom drawing, seems panel not calling paintcomponent().

you doing spelling mistake. method inside “mypanel” paincomponent() rather paintcomponent()

“t” missing prototype why program not able override paintcomponent() in mypanel class.

so have update code , replace “paintcomponent();”

complete class code given below, 

import javax.swing.*; import java.awt.*; public class mypanel extends jpanel{     public void paintcomponent(graphics g){           super.paintcomponent(g);         graphics2d g2 = (graphics2d)g;         g2.drawrect(20,20,20,20);         g2.setcolor(color.blue);         g2.filloval(50,20,20,20);         g2.drawstring("hello world", 120, 50);     }//end paincomponent  }//end test class

i have tested code works fine.


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