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Can anybody give me an easy explanation of the Java dot operator and its significance?

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The (.) operator is also called a member operator which is used to access the member of a package or a class. 

Example: 

public class test { 

   void display() { 

      double d = 89.3; 

      int i = (int)d; 

      System.out.println(i); 

   } 

   public static void main(Strinargs[]) { 

      Sample s = new Sample(); 

      s.display(); 

   } 

} 

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