Why do we need singleton?
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What is java abstraction with example?
What do the thread?class methods run() and start() do?
What is a java object and java application?
How do you avoid global variables?
Explain the usage of this with constructors?
what is heap memory?
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What will happen if we write code like: try{}catch(exception e)catch(IOException i)
how can i use a nonsynchronized hashtable?
Is ruby built on java?
what is inner class in java?
What is more advisable to create a thread, by implementing a Runnable interface or by extending Thread class?
What is class forname?