org.jfree.util

Class ObjectUtils

java.lang.Object

org.jfree.util.ObjectUtils

public abstract class ObjectUtils
extends java.lang.Object

A collection of useful static utility methods.

Constructor Summary

Constructors

Constructor and Description
ObjectUtils()

Method Summary

Methods

Modifier and Type	Method and Description
static java.util.List	clone(java.util.List list) Returns a clone of the list.
static java.lang.Object	clone(java.lang.Object object) Returns a clone of the object if the object implements the PublicCloneable interface otherwise the original object reference is returned.
static boolean	equal(java.lang.Object o1, java.lang.Object o2) Returns true if the two objects are equal OR both null.
static boolean	equalOrBothNull(java.lang.Object o1, java.lang.Object o2) Deprecated. Use ObjectUtils.equal().
static int	hashCode(java.lang.Object object) Returns a hash code for an object, or zero if the object is null.

Methods inherited from class java.lang.Object

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

Constructor Detail

ObjectUtils

public ObjectUtils()

Method Detail

equal

public static boolean equal(java.lang.Object o1,
            java.lang.Object o2)

Returns true if the two objects are equal OR both null.

Parameters:

o1 - object 1 (null permitted).

o2 - object 2 (null permitted).

Returns:

true or false.

hashCode

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

Returns a hash code for an object, or zero if the object is null.

Parameters:

object - the object (null permitted).

Returns:

The object's hash code (or zero if the object is null).

clone

public static java.lang.Object clone(java.lang.Object object)
                              throws java.lang.CloneNotSupportedException

Returns a clone of the object if the object implements the PublicCloneable interface otherwise the original object reference is returned.

Parameters:

object - the object to clone (null permitted).

Returns:

A clone or the original object reference.

Throws:

java.lang.CloneNotSupportedException - if the object cannot be cloned.

clone

public static java.util.List clone(java.util.List list)
                            throws java.lang.CloneNotSupportedException

Returns a clone of the list. The objects within the list are cloned IF they implement the PublicCloneable interface, otherwise the reference to the original object is retained in the cloned list.

Parameters:

list - the list.

Returns:

A clone of the list.

Throws:

java.lang.CloneNotSupportedException - if the list could not be cloned.

equalOrBothNull

public static boolean equalOrBothNull(java.lang.Object o1,
                      java.lang.Object o2)

Deprecated. Use ObjectUtils.equal().

Returns true if the two objects are equal OR both null.

Parameters:

o1 - object 1.

o2 - object 2.

Returns:

true or false.