Difference between string, stringbuffer and stringbuilder?
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Give some features of interface?
What does nullpointerexception mean?
What is the method overriding?
Is it possible to make an array volatile?
Difference between throw and throws?
Can inner class have constructor?
What is thread count in java?
What is string array?
Compare overloading and overriding?
What is widening and narrowing in java? Discuss with an example.
Why runnable interface is used in java?
What is the difference between a factory and abstract factory pattern?