Passing graphics to other methods

Question

Hello, I am trying to pass Graphics g to the update method so that I can use drawstring in the update method. I have only included part of my code below. img,square,index and str have all been declared.
public void paint(Graphics g)
super.paint(g);
g.setFont(font);
g.setColor(Color.blue);
g.drawImage(img,0,100,this);
g.drawString("ready",200,200);
update(g);
public update(Graphics g)
String myArr[] = new String[15];
     for (square=0; square<=14;)
     for (index=0; index<=14;)
          myArr[square] = str.substring(0,index);
          square++;
          index++;
          g.drawString(myArr[5],150,150);
     repaint();
When I run the code, I recieve this error
C:\Program Files\JCreator\MyProjects\WORK\WORK\WORK.java:71: invalid method declaration; return type required
          public update(Graphics g)
Then when I add return g; just before repaint in update(), I recieve the above error plus this error;-
C:\Program Files\JCreator\MyProjects\WORK\WORK\WORK.java:84: cannot return a value from method whose result type is void
               return g;
^
Please tell me how I can correct these errors. I know I could just add the code from the update() method to the paint() method but I would like to keep them seperate.
Thank you
Andrew

Answer 1

Your update method doesn't have a return type specified. Use
public void update(Graphics g)instead of
public update(Graphics g)That should get things compiling.
However, the logic of the painting looks wrong.
Traditionally repaint calls update and update calls paint. You've got update calling repaint (which will then call update) - it'll probably loop around forever (or until it runs out of stack).
Don't get paint to call update. Get update to call paint(g) directly.
Hope this helps.