Recall that objects are typically handled by references to the objects.
When references are compared using == in Java, the result is based on the literal value of the reference, not the Object to which the reference refers.
(The same is true for pointers in C/C++.)
Two different String objects may have exactly the same characters, but still not compare true with == because the references are different.
The method equals must be used instead to compare two strings for content:
String s1, s2;....if( s1.equals(s2) ){}
and not
String s1, s2;....if( s1 == s2 ){}
Exercise: Rewrite the member method to work properly for strings.
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