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I am doing a facilities reservation database. Situation as below: Every member has a membership which is authorized some facilities. Therefore, if a member reserve a facilities which is not authorized to his membership, it need to be charged and store into the reservation record table as an attribute reservation_fees. … 
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I have doubt that what we are using in java as String, is it class or datatype? String str = "hello" String s1 = new String("Hi") What is the difference in above two statements? Which is object of String class and which is varialble of datatype String? Because as i …
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