Object.Equals(Object) Method
Definition
Important
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Indicates whether some other object is "equal to" this one.
[Android.Runtime.Register("equals", "(Ljava/lang/Object;)Z", "GetEquals_Ljava_lang_Object_Handler")]
public virtual bool Equals (Java.Lang.Object? obj);[<Android.Runtime.Register("equals", "(Ljava/lang/Object;)Z", "GetEquals_Ljava_lang_Object_Handler")>]
override this.Equals : Java.Lang.Object -> boolParameters
- obj
- Object
the reference object with which to compare.
Returns
true if this object is the same as the obj
argument; false otherwise.
- Attributes
Remarks
Indicates whether some other object is "equal to" this one.
The equals method implements an equivalence relation on non-null object references: <ul> <li>It is reflexive: for any non-null reference value x, x.equals(x) should return true. <li>It is symmetric: for any non-null reference values x and y, x.equals(y) should return true if and only if y.equals(x) returns true. <li>It is transitive: for any non-null reference values x, y, and z, if x.equals(y) returns true and y.equals(z) returns true, then x.equals(z) should return true. <li>It is consistent: for any non-null reference values x and y, multiple invocations of x.equals(y) consistently return true or consistently return false, provided no information used in equals comparisons on the objects is modified. <li>For any non-null reference value x, x.equals(null) should return false. </ul>
The equals method for class Object implements the most discriminating possible equivalence relation on objects; that is, for any non-null reference values x and y, this method returns true if and only if x and y refer to the same object (x == y has the value true).
Note that it is generally necessary to override the hashCode method whenever this method is overridden, so as to maintain the general contract for the hashCode method, which states that equal objects must have equal hash codes.
Java documentation for java.lang.Object.equals(java.lang.Object).
Portions of this page are modifications based on work created and shared by the Android Open Source Project and used according to terms described in the Creative Commons 2.5 Attribution License.