org.jfree.chart.util

Class ObjectUtils

java.lang.Object

org.jfree.chart.util.ObjectUtils

public final class ObjectUtils
extends Object

A collection of useful static utility methods for handling classes and object instantiation.

Method Summary

Modifier and Type	Method and Description
static Object	clone(Object object) Returns a clone of the specified object, if it can be cloned, otherwise throws a CloneNotSupportedException.
static Collection	deepClone(Collection collection) Returns a new collection containing clones of all the items in the specified collection.
static boolean	equal(Object o1, Object o2) Returns true if the two objects are equal OR both null.
static int	hashCode(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

Method Detail

equal

public static boolean equal(Object o1,
                            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(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 Object clone(Object object)
                    throws CloneNotSupportedException

Returns a clone of the specified object, if it can be cloned, otherwise throws a CloneNotSupportedException.

Parameters:

object - the object to clone (null not permitted).

Returns:

A clone of the specified object.

Throws:

CloneNotSupportedException - if the object cannot be cloned.

deepClone

public static Collection deepClone(Collection collection)
                            throws CloneNotSupportedException

Returns a new collection containing clones of all the items in the specified collection.

Parameters:

collection - the collection (null not permitted).

Returns:

A new collection containing clones of all the items in the specified collection.

Throws:

CloneNotSupportedException - if any of the items in the collection cannot be cloned.