Package org.eclipse.net4j.util

Class ObjectUtil

  • public final class ObjectUtil
extends java.lang.Object
    Various static helper methods.
    Author:
    Eike Stepper

    • Method Summary

      All Methods Static Methods Concrete Methods 
      Modifier and Type Method Description
      static <T> T[] appendtoArray​(T[] array, T... elements)  
      static java.lang.Exception close​(java.lang.Object object)  
      static boolean equals​(java.lang.Object o1, java.lang.Object o2)  
      static <T> void forEachSafe​(java.lang.Iterable<T> iterable, java.util.function.Consumer<T> consumer)  
      static <T> void forEachSafe​(T[] array, java.util.function.Consumer<T> consumer)  
      static int hashCode​(int... values)
      A collision-free hash code for small sets (<=4) of small, positive integers (<=128)
      static int hashCode​(long num)  
      static int hashCode​(java.lang.Object o)  
      static boolean isEmpty​(java.lang.String string)  
      static <T extends java.util.Collection<?>>
      boolean      		 isEmpty​(java.util.Collection<?> collection)  
      static <T extends java.util.Map<?,​?>>
      boolean      		 isEmpty​(java.util.Map<?,​?> map)  
      static <T> boolean isEmpty​(T[] array)  
      static boolean never()  
      static <T> T notNull​(T object)  
      static <T> T tryCast​(java.lang.Object object, java.lang.Class<T> type)
      Attempts to cast an object as an instance of the given type.

      • Methods inherited from class java.lang.Object

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

    • Method Detail

      • never

        public static boolean never()
        Since:
        3.6

      • equals

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

      • hashCode

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

      • hashCode

        public static int hashCode​(int... values)
        A collision-free hash code for small sets (<=4) of small, positive integers (<=128)
        Since:
        3.2

      • hashCode

        public static int hashCode​(long num)

      • appendtoArray

        public static <T> T[] appendtoArray​(T[] array,
                                    T... elements)

      • isEmpty

        public static <T> boolean isEmpty​(T[] array)
        Since:
        3.1

      • isEmpty

        public static <T extends java.util.Map<?,​?>> boolean isEmpty​(java.util.Map<?,​?> map)
        Since:
        3.1

      • isEmpty

        public static <T extends java.util.Collection<?>> boolean isEmpty​(java.util.Collection<?> collection)
        Since:
        3.1

      • isEmpty

        public static boolean isEmpty​(java.lang.String string)
        Since:
        3.1

      • close

        public static java.lang.Exception close​(java.lang.Object object)
        Since:
        3.3

      • notNull

        public static <T> T notNull​(T object)
        Since:
        3.3

      • tryCast

        public static <T> T tryCast​(java.lang.Object object,
                            java.lang.Class<T> type)
        Attempts to cast an object as an instance of the given type.
        Parameters:
        object - an object to cast to some type
        type - the type to cast the object to
        Returns:
        the object or null if it is not of the required type
        Since:
        3.4

      • forEachSafe

        public static <T> void forEachSafe​(java.lang.Iterable<T> iterable,
                                   java.util.function.Consumer<T> consumer)
        Since:
        3.13

      • forEachSafe

        public static <T> void forEachSafe​(T[] array,
                                   java.util.function.Consumer<T> consumer)
        Since:
        3.13