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InterviewSolution
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What Is A Weakhashmap? |
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Answer» WEAKHASHMAP is a Hash table based implementation of the Map interface, with weak keys. An entry in a WeakHashMap will automatically be REMOVED when its key is no longer in ordinary use. Which MEANS storing only weak references allows GARBAGE collector to remove the entry (key-value PAIR) from the map when its key is not referenced outside of the WeakHashMap. In WeakHashMap both null values and the null key are supported. A WeakHashMap is created as- Map weakHashMap = new WeakHashMap(); WeakHashMap is a Hash table based implementation of the Map interface, with weak keys. An entry in a WeakHashMap will automatically be removed when its key is no longer in ordinary use. Which means storing only weak references allows garbage collector to remove the entry (key-value pair) from the map when its key is not referenced outside of the WeakHashMap. In WeakHashMap both null values and the null key are supported. A WeakHashMap is created as- Map weakHashMap = new WeakHashMap(); |
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