Whenever you are writing a function equals in a subclass that has fields, it should probably look like this one. This method equals illustrates the systematic way to test all that has to be tested.

Here's a class that might be used in a program that accesses records from a file. It's certainly possible we might create two different FileEntry objects from the same record, in which case …

If we have two string objects, we use the equals() method to check if they are the same. In Java, we always use the equals() message to compare two objects – strings are just an example of …

Indicates whether some other object is “equal to” this one. The equals method implements an equivalence relation: should return true. y.equals(x) returns true. x.equals(y) returns true and …

String interning is a method of storing only one copy of each distinct string value, i.e., the distinct values are stored in a pool of unique strings - All compile-time constant strings in Java are …

Each object inherits a method called equals() that compares two objects are equal it returns true. If they ar not equal it returns fals What do we mean by equal? By default, the equals method …

So when is it appropriate to override Object.equals? When a class has a notion of logical equality that differs from mere object identity, and a superclass has not already overridden equals to …