@Override
  public boolean hasNext() {
    while (!(iterators.isEmpty() || iterators.peek().hasNext())) {
      Assert.isFalse(iterators.removeFirst().hasNext(), new IllegalStateException("removing a non-empty Iterator"));
    }

    return (!iterators.isEmpty() && iterators.peek().hasNext());
  }
@ Override public boolean hasNext ( ) { while ( ! ( iterators . isEmpty ( ) || iterators . peek ( ) . hasNext ( ) ) ) { Assert . isFalse ( iterators . removeFirst ( ) . hasNext ( ) , new IllegalStateException ( "removing a non-empty Iterator" ) ) ; } return ( ! iterators . isEmpty ( ) && iterators . peek ( ) . hasNext ( ) ) ; }
Determines whether another element is available in the iteration.

@return a boolean value indicating whether another element is available in the iteration.
@see java.util.Iterator#hasNext()