Package org.jfree.chart.util

Class ObjectUtils

  • public final class ObjectUtils
extends java.lang.Object
    A collection of useful static utility methods for handling classes and object instantiation.

    • Constructor Summary

      Constructors 
      Modifier Constructor Description
      private ObjectUtils()
      Default constructor - private.

    • Method Summary

      All Methods Static Methods Concrete Methods Deprecated Methods 
      Modifier and Type Method Description
      static java.lang.Object clone​(java.lang.Object object)
      Returns a clone of the specified object, if it can be cloned, otherwise throws a CloneNotSupportedException.
      static java.util.Collection deepClone​(java.util.Collection collection)
      Returns a new collection containing clones of all the items in the specified collection.
      static boolean equal​(java.lang.Object o1, java.lang.Object o2)
      Deprecated.
      Use Objects.equals() from the JDK.
      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

        private ObjectUtils()
        Default constructor - private.

    • Method Detail

      • equal

        public static boolean equal​(java.lang.Object o1,
                            java.lang.Object o2)
        Deprecated.
        Use Objects.equals() from the JDK.
        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 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:
        java.lang.CloneNotSupportedException - if the object cannot be cloned.

      • deepClone

        public static java.util.Collection deepClone​(java.util.Collection collection)
                                      throws java.lang.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:
        java.lang.CloneNotSupportedException - if any of the items in the collection cannot be cloned.