Why java?
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How can the static main method use instance variables?
What is gwt in java?
What is orm in java?
Is java singleton thread safe?
What is mime in java?
What is the difference between ec2 and lambda?
Is php faster than java?
What is a stream in java?
Where is singleton design pattern used in java?
What is log4j in java?
What is the difference between lambdas and delegates?
I want to control database connections in my program and want that only one thread should be able to make database connection at a time. Define how can I implement this logic?