What is differences between singly recursvie method and doubly recursive
method?

     Hello people,
i installed few hours ago the JDK 1.5.0 .i am using Win98SE ,I tried to
compile some simple programs and the javac command works fine and i get
the *.class files.Although when i do java filename.class i get the

almost got my 2nd to last program done for my java class.  the only problem
i'm having is the exit button.  need a JButton that closes the program, can
someone point me in the right direction? i've got it set up, just doesn't
do anything when you click it.  

In this main class I call the method setBar1 as shown below:
class TestGraph
{ public static void main(String[] a)
 { BarGraphWriter e = new BarGraphWriter(200,200);