How to use

getLayoutDimensions

method

in

java.awt.GridBagLayout

final GridBagLayout layout = new GridBagLayout();
 JPanel content = new JPanel(layout)
 {
   @Override
   public void paint(Graphics g)
   {
     super.paint(g);
     int[][] dims = layout.getLayoutDimensions();
     g.setColor(Color.BLUE);
     int x = 0;
     for (int add : dims[0])
     {
       x += add;
       g.drawLine(x, 0, x, getHeight());
     }
     int y = 0;
     for (int add : dims[1])
     {
       y += add;
       g.drawLine(0, y, getWidth(), y);
     }
   }
 };

int[][] a = layout.getLayoutDimensions();
System.out.println(Arrays.deepToString(a));
System.out.format("isEmpty(%d, %d): %s%n", 2, 1, isEmpty(a, 2, 1));