What is difference between iterator and enumeration in java?
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What are recursive functions?
What is the purpose of static methods and variables?
what is the output ? Math.floor(-2.1) a)2 b)-2 c)-3.0 d)0
How to optimize the javac output?
What is main string [] args?
What is the Scope of Static Variable?
why do we use interface in java?
How can we make string upper case or lower case?
What are the Abstract Classes provided by Java?
Can array grow dynamically in java?
what is polymorphism?
We have two methods to create methods the threads. 1. Implementing runnable interface 2. Extending to thread class and overriding run method. Among these two which one is better and why? Please explain me in detail.