What is the difference between variable declaration and variable initialization?
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In the HashMap, we know the values but we dont know the key, then how can we get the key from HashMap ?????
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What is the old name of java?
for what purpose we use applets ?
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What is an object class?
In a program, initializing an array of 100 KB is throwing an out of memory exception while there is 100 MB of memory available. Why?
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Which method returns the length of a string?