@GwtCompatible public final class Objects extends Object
Object
.
See the Guava User Guide on writing Object
methods with Objects
.
Modifier and Type | Method and Description |
---|---|
static boolean |
equal(@Nullable Object a,
@Nullable Object b)
Determines whether two possibly-null objects are equal.
|
static int |
hashCode(Object... objects)
Generates a hash code for multiple values.
|
public static boolean equal(@Nullable Object a, @Nullable Object b)
true
if a
and b
are both null.
true
if a
and b
are both non-null and they are equal according to
Object.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.
public static int hashCode(Object... objects)
Arrays.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
, and z
, 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.
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