Package org.apache.pivot.util

Class EmptyIterator<T>

  • All Implemented Interfaces:
    java.util.Iterator<T>
    public class EmptyIterator<T>
extends java.lang.Object
implements java.util.Iterator<T>
    A no-op iterator, for which hasNext() always returns false and next() throws NoSuchElementException.

    This is used (for instance) for HashMap when a hash bucket list is empty, so that iteration through the bucket list doesn't have to be special-cased.

    Note: for Java 8 we have taken out the implementation of the remove() method because the interface now implements it as we need it as a default method.

    • Constructor Summary

      Constructors 
      Constructor Description
      EmptyIterator()  

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      boolean hasNext()  
      T next()  

      • Methods inherited from class java.lang.Object

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

      • Methods inherited from interface java.util.Iterator

        forEachRemaining, remove

    • Constructor Detail

      • EmptyIterator

        public EmptyIterator()

    • Method Detail

      • hasNext

        public boolean hasNext()
        Specified by:
        hasNext in interface java.util.Iterator<T>

      • next

        public T next()
        Specified by:
        next in interface java.util.Iterator<T>