A DESCRIPTION OF THE REQUEST :
java.awt.GridBagLayout, Java 1.5.0-b64, lines 897-899:

      /* Adjust the grid width and height */
      for (px = curX + curWidth; r.width < px; r.width++);
      for (py = curY + curHeight; r.height < py; r.height++);

JUSTIFICATION :
Using a for loop to do something which doesn't require a loop is very inefficient.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
This should be
    px = curX + curWidth;
    r.width = Math.max(r.width, px);
    py = curY + curHeight;
    r.height = Math.max(r.height, py);
ACTUAL -
See above