Why do we have to declare a field in a class or method to be final in java,
if it is to be accessed/used from an anonymous inner class?
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You don't need that. The only thing you need are getters and setters (a very important way of manipulating field in Java, take a look !). Final means you will never be able to change its value. – Lutzi Apr 30 '18 at 12:52
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1Lutzi is correct. This restriction applies to local variables, not fields. – Stephen C Apr 30 '18 at 12:53
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Also note that this is not needed anymore, it is enough if the local variable is effectively final. – AxelH Apr 30 '18 at 13:14