Why java strings are immutable in nature?
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What if constructor is protected in java?
Can we use a default constructor of a class even if an explicit constructor is defined?
What are abstract classes and anonymous classes?
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how to handled exceptions & erros in ejb?
What is lifetime variable?
what is Hashmap & Hashtable wirh example?
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Which is best ide for java?
When will we prefer to use set and list in java and why?
Explain throw keyword in java?
Why can we not override static method?
I have a Person object with 5 variables and I want to store them in a file called Person.txt. What should I do?