Search:

Thank you, the setPreferredSize does work! I was using the setSize method at the JPanel but it didn't had any effect

Here is my code:


import java.awt.Container;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.GridLayout;
import java.awt.Insets;

import javax.swing.*;

I want to make a drawing (A rectangle which is colored according RGB values that are scanned real-time), and add this drawing to a JPanel. This JPanel has to be added to the layout of the main frame....