Examples of java.util.LinkedList.peek()

java.util.LinkedList.peek()
Retrieves, but does not remove, the head (first element) of this list. @return the head of this list, or null if this list is empty @since 1.5

    
    List<PDGNode> processed = new ArrayList<PDGNode>();
    Queue nodes = new LinkedList();
    nodes.offer(this.m_startNode);
    
    while(nodes.peek() != null)
    {
      PDGNode node = (PDGNode) nodes.remove();
      processed.add(node);
      
      s += "\n Begin PDGNode: " + node;

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     * @tests {@link java.util.LinkedList#peek()}
     */
    public void test_peek() {
        LinkedList list = new LinkedList();


        assertNull("Should return null if this list is empty", list.peek());


        assertEquals("Returned incorrect first element", ll.peek(),objArray[0]);
        assertEquals("Peek remove the head (first element) of this list", ll.getFirst(), objArray[0]);
    }

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     * @tests {@link java.util.LinkedList#peek()}
     */
    public void test_peek() {
        LinkedList list = new LinkedList();


        assertNull("Should return null if this list is empty", list.peek());


        assertEquals("Returned incorrect first element", ll.peek(),objArray[0]);
        assertEquals("Peek remove the head (first element) of this list", ll.getFirst(), objArray[0]);
    }

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     * @tests {@link java.util.LinkedList#peek()}
     */
    public void test_peek() {
        LinkedList list = new LinkedList();


        assertNull("Should return null if this list is empty", list.peek());


        assertEquals("Returned incorrect first element", ll.peek(),objArray[0]);
        assertEquals("Peek remove the head (first element) of this list", ll.getFirst(), objArray[0]);
    }

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