Give a practical example of singleton class usage?
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which one is more efficient int x; 1. if(x==null) 2.if(null==x) state which one either 1 or 2?
Is null a value?
What is memory leak and how does java handle it?
What data type is a string?
Why destructor is not used in java?
what is the difference between System.exit() and System.exit(1)?
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What is unicode?
What is close method? How it's different from Finalize & Dispose?
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What is indexof?
Describe how to implement singleton design pattern in struts.
What is meant by class and object in java?
When should the method invokelater() be used?