Why Do Non-Resizable Windows Overlap When Positioned Adjacent to Each Other?

Non-Resizable Window Border Positioning: Challenges and Solutions

In the realm of window management, developers often encounter a perplexing issue when attempting to position non-resizable windows adjacent to each other. In this situation, the setLocation method seems to miscalculate the window border's dimensions, resulting in overlapping borders.

To illustrate this problem, consider the following code snippet:

import java.awt.Rectangle;
import javax.swing.JFrame;

public class FrameBorders {
  public static void main(String[] args) {
    JFrame frame1 = new JFrame("frame 1");
    JFrame frame2 = new JFrame("frame 2");

    frame1.setResizable(false);
    frame2.setResizable(false);

    frame1.setVisible(true);        
    Rectangle bounds = frame1.getBounds();      
    frame2.setLocation(bounds.x+bounds.width, bounds.y);
    frame2.setVisible(true);
  }
}

When Windows Aero is enabled, the second frame (frame2) is positioned incorrectly, overlapping the first frame's border. This occurs because the setLocation method fails to account for the non-resizable nature of the windows.

One might speculate that this behavior is a bug, but it's actually a potential source of problems when working with unresizable containers. Suppose you adjust the container's bounds to look optimal on your platform. However, when the container is displayed on a different platform with a font that has different metrics, the text may become obscured.

Therefore, when modifying the bounds of a non-resizable container, it's crucial to ensure that any text content remains visible, regardless of the host platform's default font. To achieve this, you can use techniques like computing the string width using FontMetrics and setting the container's size accordingly.

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