The object class and The Equals () method

1 = = for the base data type, the values on both sides determine whether they are equal, and return true even if the data types are different on either end. Reference data types, comparing addresses that reference variable types are equal

2 equals () is a comparison of reference-type variables for equality and also for comparing address values

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 PackageLianxi2; Public classTestequals { Public Static voidMain (String []args) {Department D1=NewDepartment (); Department D2=NewDepartment (); System.out.println (D1==D2); System.out.println (D1.equals (D2)); //the Equals method of objectString S1=NewString ("TT"); String S2=NewString ("TT"); System.out.println (S1==S2);  System.out.println (s1.equals (S2)); //The string class overrides the Equals method    }}

The object class and The Equals () method