java - SimpleDateFormat does not throw IllegalArgumentException -


I want to check the date pattern like this: 

  try {new SimpleDateFormat (Pattern)} hold (illegal illegal exception e) {}

But it seems that when I try to add "AAA", then it does not fail: (

This is because a

I Try to add "aaa", code> AM / PM marker. 

  SimpleDateform F = New SimpleDateform ("AAA"); System. Autkprintelan (Fkformet (new Date ()); // prints "AM"

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