Code example for NoSuchElementException

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        return e1 != null;
    } 
 
    public E next() { 
        if (e1 == null) {
            throw new NoSuchElementException();
        } 
        E e = e1;
        e1 = e2;
        e2 = null;
        return e;
    } 
 
    public void remove() { 
    } 
 
    // ------------------------------------------------------------------------- 
    // Utility methods 
    // ------------------------------------------------------------------------- 
 
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