Does treeset allow null in java?
What is hash code collision?
what is the difference between cd & dvd ?
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What does regex mean?
What is design pattern and there types?
why java is better then .net?
Are true and false keywords?
What do you mean by formatting?
What is the default modifier in Interface?
What is super keyword in java ?
Why is stringbuffer called mutable?
What is the mapping mechanism used by java to identify IDL language?
can abstract class have constructor how can you achive this ?