Package com.google.common.base
Class Objects
- java.lang.Object
-
- com.google.common.base.Objects
-
@GwtCompatible public final class Objects extends java.lang.Object
Helper functions that can operate on anyObject
.See the Guava User Guide on writing
Object
methods withObjects
.- Since:
- 2.0
- Author:
- Laurence Gonsalves
-
-
Method Summary
All Methods Static Methods Concrete Methods Modifier and Type Method Description static boolean
equal(java.lang.Object a, java.lang.Object b)
Determines whether two possibly-null objects are equal.static int
hashCode(@Nullable java.lang.Object... objects)
Generates a hash code for multiple values.
-
-
-
Method Detail
-
equal
public static boolean equal(@CheckForNull java.lang.Object a, @CheckForNull java.lang.Object b)
Determines whether two possibly-null objects are equal. Returns:true
ifa
andb
are both null.true
ifa
andb
are both non-null and they are equal according toObject.equals(Object)
.false
in all other situations.
This assumes that any non-null objects passed to this function conform to the
equals()
contract.Note for Java 7 and later: This method should be treated as deprecated; use
Objects.equals(java.lang.Object, java.lang.Object)
instead.
-
hashCode
public static int hashCode(@CheckForNull @Nullable java.lang.Object... objects)
Generates a hash code for multiple values. The hash code is generated by callingArrays.hashCode(Object[])
. Note that array arguments to this method, with the exception of a single Object array, do not get any special handling; their hash codes are based on identity and not contents.This is useful for implementing
Object.hashCode()
. For example, in an object that has three properties,x
,y
, andz
, one could write:public int hashCode() { return Objects.hashCode(getX(), getY(), getZ()); }
Warning: When a single object is supplied, the returned hash code does not equal the hash code of that object.
Note for Java 7 and later: This method should be treated as deprecated; use
Objects.hash(java.lang.Object...)
instead.
-
-