Class DualCollection<T>

  • All Implemented Interfaces:, java.lang.Iterable<T>, java.util.Collection<T>

    public class DualCollection<T>
    extends java.util.AbstractCollection<T>
    A combination of two collections into a collection.
    See Also:
    Serialized Form
    • Constructor Summary

      Constructor Description
      DualCollection​(java.util.Collection<T> first, java.util.Collection<T> second)
    • Method Summary

      All Methods Static Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      static <M> java.util.Collection<M> combine​(java.util.Collection<M> first, java.util.Collection<M> second)
      Returns a collection by combining two collections.
      java.util.Iterator<T> iterator()  
      int size()  
      • Methods inherited from class java.util.AbstractCollection

        add, addAll, clear, contains, containsAll, isEmpty, remove, removeAll, retainAll, toArray, toArray, toString
      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
      • Methods inherited from interface java.util.Collection

        equals, hashCode, parallelStream, removeIf, spliterator, stream, toArray
      • Methods inherited from interface java.lang.Iterable

    • Method Detail

      • combine

        public static final <M> java.util.Collection<M> combine​(java.util.Collection<M> first,
                                                                java.util.Collection<M> second)
        Returns a collection by combining two collections. It checks whether any of them is null, or equals. And, returns the non-null one if another is null. If both null, it returns null.
      • size

        public int size()
        Specified by:
        size in interface java.util.Collection<T>
        Specified by:
        size in class java.util.AbstractCollection<T>
      • iterator

        public java.util.Iterator<T> iterator()
        Specified by:
        iterator in interface java.util.Collection<T>
        Specified by:
        iterator in interface java.lang.Iterable<T>
        Specified by:
        iterator in class java.util.AbstractCollection<T>