Please help me analyze it, why does the following program enter an infinite loop?

speedmax123

Please help me analyze it, why does the following program enter an infinite loop?
mainPanel.addComponentListener (new ComponentAdapter () {
      public void componentResized (ComponentEvent e) {
        Dimension d = mainPanel.getPreferredSize ();
        if (d.width <200) {
          mainPanel.setSize (200, d.height);
        }
        if (d.height <400) {
          mainPanel.setSize (d.width, 400);
        }
      }
    });

小样干啥子

Each time you resize, componentResized is triggered
And componentResized will resize
That will definitely produce an endless loop

火力强劲

Is mainPanel.setSize (200, d.height) triggering the componentResize event again,
Is the infinite loop going on? !

火力强劲

Is mainPanel.setSize () triggering the componentResize event again,
Is the infinite loop going on? !

seakey

... where is the loop?
 if (d.width <200) {
          mainPanel.setSize (200, d.height);
        }
        if (d.height <400) {
What if d.width> 200&&d.height> 400?

speedmax123

The problem has been found: mainly caused by these two sentences
Dimension d = mainPanel.getPreferredSize ();

 mainPanel.setSize (d.width, 400);
In many circumstances:
  preferredSize << size