equals() and hashCode() : equals method « Utility Classes « SCJP

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SCJP » Utility Classes » equals method

8.2.1.equals() and hashCode()

Use == to determine if two reference variables refer to the same object.



Use equals() to determine if two objects are meaningfully equivalent.



If x.equals(y) is true, then x.hashCode() == y.hashCode() is true.



If you override equals(), override hashCode().

8.2.equals method
	8.2.1.	equals() and hashCode()
	8.2.2.	The signature of equals() from Object class is 'public boolean equals(Object object)'
	8.2.3.	Implementing an equals() Method

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