> After the first time a JTableHeader is serialized, it no longer will 
> uninstall its UI upon subsequent serializations.
> This happens for classes that use the BasicTableHeaderUI class. Any LAF that 
> extends the BasicTableHeaderUI like SynthTableHeaderUI and 
> WindowsTableHeaderUI will get an NotSerializableException thrown
> 
> Each time an JComponent instance is Serialized, a [counter 
> ](https://github.com/openjdk/jdk/blob/218829e0a2a3ae5599b81733df53557966392033/src/java.desktop/share/classes/javax/swing/JComponent.java#L5644-L5645)
>  for the instance is incremented. It is de-incremented in JComponent's 
> writeObject or a class that implements it the same way, like JButton, 
> JScrollPane etc..
> With JTableHeader it does not deincrement the counter. The uninstall 
> mechanism will not uninstall a UI if the counter is not 0 on the first 
> pass..It is not possible to call JComponent.setWriteObjectCounter in 
> JTableHeader as it is not in the same package so the fix is to remove the 
> writeObject implementation and rely on JComponent writeObject implementation 
> to make sure uninstallation of UI happens and also NotSerializableException 
> does not happen for Synth

Prasanta Sadhukhan has updated the pull request incrementally with one 
additional commit since the last revision:

  try-with-resource use

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/15507/files
  - new: https://git.openjdk.org/jdk/pull/15507/files/267a4787..7303c96f

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=15507&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=15507&range=01-02

  Stats: 5 lines in 1 file changed: 0 ins; 0 del; 5 mod
  Patch: https://git.openjdk.org/jdk/pull/15507.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/15507/head:pull/15507

PR: https://git.openjdk.org/jdk/pull/15507

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