Initialize Map size

In my class I create about 10 different Maps. I thought of initializing the size. But I also thought is there going to be an advantage in doing so.

Approach1:
Map<String,String> myMap = new HashMap<String, String>(5);
Approch2:
Map<String,String> myMap = new HashMap<String, String>();
Per Approach2, the default capacity is 16. But will the memory allocation is more for approach2 compare to approach1?

Quote:

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will the memory allocation is more for approach2

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What Java programmer cares? :D If you're interested, you can try it both ways and inspect the heap and memory usage with a tool like jvisualvm. Unless you're writing code that's at the core of a high-throughput application, you're unlikely to feel the benefit of such a hand optimisation. Additionally, you may not see the same difference in memory allocation from one JVM to another, or possibly - thanks to the unpredictability of the garbage collector - even from one run of your code to another.

While you're writing applications with 10 Maps each containing 5 entries, burn memory with gay abandon - that's what makes us Java programmers!

Thanks Sean4u. I fully agree with you...I just wanted to have opinion of one more person.