Why is struts used in java?
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What are the disadvantages of java sockets?
How can the static main method use instance variables?
Can you compile java into exe?
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ioc vs dependency injection?
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In a barber shop there are 2 doors. customer come in 1 door, leave in other. minimum # of chairs. barber spend his life in cutting. always barber can cut 1 customer. few chairs in the shop. if barber busy customer waits, if chairs full, customer leave. if no customer, barber sleeps. treat barber and customer as 2 threads. you can use Semaphore class with arrive and depart and count as parameter.