com.annimon.stream

Class Objects

java.lang.Object

com.annimon.stream.Objects

public final class Objects
extends java.lang.Object

Common operations with Object.

Method Summary

Modifier and Type	Method and Description
static <T> int	compare(T a, T b, java.util.Comparator<? super T> c) Compares two objects with provided comparator.
static boolean	equals(java.lang.Object a, java.lang.Object b) Checks equality of two objects.
static int	hash(java.lang.Object... values) Returns the hash code for objects.
static int	hashCode(java.lang.Object o) Returns the hash code of object.
static <T> T	requireNonNull(T obj) Checks that object reference is not null.
static <T> T	requireNonNull(T obj, java.lang.String message) Checks that object reference is not null.
static java.lang.String	toString(java.lang.Object o, java.lang.String nullDefault) Returns result of calling toString on object or nullDefault if object is null.

Methods inherited from class java.lang.Object

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

Method Detail

equals

public static boolean equals(java.lang.Object a,
                             java.lang.Object b)

Checks equality of two objects.

Parameters:

a - an object

b - an object

Returns:

true if objects are equals, false otherwise

hashCode

public static int hashCode(java.lang.Object o)

Returns the hash code of object.

Parameters:

o - an object

Returns:

the hash code

hash

public static int hash(java.lang.Object... values)

Returns the hash code for objects.

Parameters:

values - the values

Returns:

the hash code

toString

public static java.lang.String toString(java.lang.Object o,
                                        java.lang.String nullDefault)

Returns result of calling toString on object or nullDefault if object is null.

Parameters:

o - an object

nullDefault - a string to return if object is null

Returns:

a result of calling toString on object or nullDefault if object is null.

compare

public static <T> int compare(T a,
                              T b,
                              java.util.Comparator<? super T> c)

Compares two objects with provided comparator.

Type Parameters:

T - the type of the arguments

Parameters:

a - an object

b - an object

c - the comparator

Returns:

comparing result

requireNonNull

public static <T> T requireNonNull(T obj)

Checks that object reference is not null.

Type Parameters:

T - the type of the object

Parameters:

obj - an object

Returns:

a source object if it is not null

Throws:

java.lang.NullPointerException - if object is null

See Also:

requireNonNull(java.lang.Object, java.lang.String)

requireNonNull

public static <T> T requireNonNull(T obj,
                                   java.lang.String message)

Checks that object reference is not null.

Type Parameters:

T - the type of the object

Parameters:

obj - an object

message - a message to be used as exception details

Returns:

a source object if it is not null

Throws:

java.lang.NullPointerException - if object is null

See Also:

requireNonNull(java.lang.Object)