My program works but..... please help

Question

heres my problem. my applet asks a math question ( what is x * y ) and user inputs answer in jtext field. when answer is correct, status bar displays " very good!"
if incorrect, status bar displays " sorry, try again". it does this fine, however when the user answer correctly a new problem should be painted on the applet. thats where my problem is, i cant get it to refresh the question.
here is a summary of my code.
public void init()
container....
Jtextfield....
public void paint( Graphics g)
paints the question here
public void actionPerformed(ActionEvent actionEvent)
if / elsestatements checking if answer is correct
public int calculation()
math.random() class method
i know i need to put a while loop in there but i dont know where and i dont know how to call the method that needs to be called. any guidance is greatly appreciated.
thanks

Answer 1

add stuff like this. Everything that is bolded add. NOTE, I am assuming calculate is your button.
boolean flag = false;
public void init()
container....
Jtextfield....
public void paint( Graphics g)
paints the question here
public void actionPerformed(ActionEvent actionEvent)
if(actionEvent.getSource() == calculate){
flag = true;
     if / elsestatements checking if answer is correct
     if(flag){
repaint();
flag = false;
public int calculation()
math.random() class method
}If this works could I have some Duke Dollars?