Name the packages in JDK?

2 Answers  

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garbate collector(GC)?

4 Answers  

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What is core java called?

0 Answers  

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How long will it take to learn java?

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Explain parallel processing in java8?

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Explain features of interfaces in java?

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my method "abc" return array of interface "xyz" and "pqr" is abstract class implements abc and class "jkl" extends pqr My problem 1) when i call abc it retrun array xyz how can i do this hint xyz refer_xyz = new jkl(); but i can't create array. 2)I want to access method of jkl using reference of xyz??

1 Answers  

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What is immutable data?

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Map map = new HashMap(2); map.add(“1”,”one”); map.add(“2”,”two”); map.add(“3”,”three”); What will happen at this line?

5 Answers   Rolta,

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Where will it be used?

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What are the types of literals?

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What does nullpointerexception mean?

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