Need help in making my Oval increase in size.

[Kei Teh]

Hi guys! I need a little help in creating shapes.

Below is my code, but no matter what I do, I cannot make the Oval increase gradually (ie. once I run the program I should be able to see it increase). Any advice? Thanks for your help in advance.

Edit: I've added my whole code in just to make sure.

import javax.swing.*;
import java.awt.*;

class BigBlueDrawPanel extends JPanel{    
    int size = 50;
    
    public void drawing(){
           repaint();
        }

    public void paintComponent(Graphics g){
        super.paintComponent(g);

        g.setColor(Color.blue);        
        g.fillOval(225,225,size,size);
        
        for(int i=0; i<=200; i++){
            size = size + 2;
        }
    }
        
}

import javax.swing.*;
import java.awt.*;

public class SimpleDrawing
{
    
    public static void main(String[] args){
        SimpleDrawing draw = new SimpleDrawing();
        draw.go();
    }
    
    public void go(){
        JFrame frame = new JFrame("SimpleDrawing");
        frame.setVisible(true);
        frame.setSize(500,500);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        
        BigBlueDrawPanel object2 = new BigBlueDrawPanel();
        frame.add(object2);      
        
    }
}

[Campbell Ritchie]

I think I ought to move this discussion to our GUIs forum.

You are nowhere increasing the size of the display. You have a drawing() method but you don’t appear to be calling it from anywhere.

[Kei Teh]

I thought of using for loop to increase the height and width of the oval by 2 as shown. Could it be I'm using it wrongly?

[Michael Dunn]

> Could it be I'm using it wrongly?

yes.

what calls your drawing()

> I cannot make the Oval increase gradually

you need a swing.timer

[Kei Teh]

Michael Dunn wrote:> Could it be I'm using it wrongly?

yes.

what calls your drawing()

> I cannot make the Oval increase gradually

you need a swing.timer

thanks. i got it