How to change the size ratio of elements in Swing?

Question

Java

For example, I have a main JPanel that contains two more JPanels (top and bottom).
And I want the top to be, for example, 2/3 of the main one, and the bottom 1/3, so that when the window is resized, the sizes of my panels also change?

Answer 1

Read about layout managers. If you describe everything in code, then look towards GridBagLayout. If you use visual ui editors, then there will most likely be SpringLayout.