What does it mean that strings are immutable?
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how cani read a command line argument?(usingfile object).
Is null a value?
What's the purpose of using break in each case of switch statement?
What is access modifiers?
What are the characteristics provided in jdk1.6 apart from other versions?
What is interface and its use?
how are methods defined?
Difference between abstract and concrete class ?
Why scanner is used in java?
Is list thread safe in java?
Is string is a keyword in java?
Where can I find data structures question and answers with comprehensive working code written in Java