Difference Between Equals And In Java
determining equality in Java: equals() vs ==
Difference Between Equals And In Java
In Java, the equals() method is used to compare the actual content of two objects, typically overridden in custom classes to define the criteria for equality. On the other hand, the “==” operator checks whether two object references point to the same memory location, essentially comparing the memory addresses rather than the content of the objects. Therefore, when comparing objects for equality in Java, it is important to use the equals() method to ensure the comparison is based on the desired criteria rather than just the memory locations.
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1 - Equals method in Java:
The `equals` method in Java is used to compare the equality of two objects.
2) '==' operator in Java:
The ‘==’ operator in Java is used to compare the reference/address of two objects in memory.
3) Overriding equals method:
Developers can override the `equals` method in Java to define custom equality comparison for objects.
4) Equals method for comparing values:
The `equals` method is primarily used to compare the values/state of two objects.
5) Using ‘==’ for reference comparison:
When using the ‘==’ operator, Java compares the memory address (reference) of the objects directly.
6) Default equals implementation:
The default implementation of the `equals` method in Java compares memory addresses of objects, similar to the ‘==’ operator.
7) String equals method:
In the case of Strings, the `equals` method compares the actual content of the strings rather than the memory references.
8) 'In' operator in Java:
The `in` keyword is not a recognized keyword in Java. Perhaps you meant ‘instanceof’ keyword for checking if an object is an instance of a particular class.
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