com.google.inject.internal.util

Class Objects

java.lang.Object

com.google.inject.internal.util.Objects

public final class Objects
extends Object

Helper functions that can operate on any Object.

Author:

Laurence Gonsalves

Method Summary

Methods

Modifier and Type	Method and Description
static boolean	equal(Object a, Object b) Determines whether two possibly-null objects are equal.
static int	hashCode(Object... objects) Generates a hash code for multiple values.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

equal

public static boolean equal(@Nullable
            Object a,
            @Nullable
            Object b)

Determines whether two possibly-null objects are equal. Returns:

• 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.

hashCode

public static int hashCode(Object... objects)

Generates a hash code for multiple values. The hash code is generated by calling Arrays.hashCode(Object[]).

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.