JPanel Graphics clearing and repainting?

Question

I have a JPanel with a paintComponent() function. I\'ll call it once, then when the user clicks a different JButton, I\'ll set some fl

Answer 1

First, why not use an enum instead of a boolean?

enum Enum { 
    RECTANGLE,
    LINE,
    CIRCLE
}

Enum choice = RECTANGLE; //default to RECTANGLE

switch(choice) { 
   // case RECTANGLE, LINE, CIRCLE
}

With regards to your issue, can you answer my comments in your question?