Object.Equals(Object) Method
Definition
Important
Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.
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>
An equivalence relation partitions the elements it operates on into equivalence classes; all the members of an equivalence class are equal to each other. Members of an equivalence class are substitutable for each other, at least for some purposes.
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.