What are the basics of core java?
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What is abstract class? Explain
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??
How do you declare a string variable?
How to declare an arraylist in java?
Iterator in the HashMap is fail-safe means what?
What is listnode in java?
What is flag in java?
What is float in java?
why to use transient variables when static variables can be used for Serialization
How would overload a function based on return type?
What are JVM.JRE, J2EE, JNI?
How does the garbage collector works in java?