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What is this in java?

this is a keyword in java which refers to the current instance of the class. Every constructor and all non-static methods in java have this as an implicitly parameter.

Note: When n numbers of parameters are passed in a method then from JRE point of view n+1 number of parameters are passed in the method. One additional parameter is this. If this keyword is used in constructor or method then this must be the first statement. 

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