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Explain the features of interfaces in java?
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What is the use of 'super' keyword inside a constructor?
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What are the changes in java.io in java 8 ?
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??
String class is defined under which package in java?
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