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Consider the following class definitions:
public class LinkedChain<T> { private Node<T> firstNode; private int...
X406: Linked Chain Find Middle Node
Consider the following class definitions:
public class LinkedChain<T> {
private Node<T> firstNode;
private int numberOfEntries;
public LinkedChain() {
firstNode = null;
numberOfEntries = 0;
}// end default constructor
public Node<T> getfirstNode() {
return firstNode;
}
public int getNumberOfEntries() {
return numberOfEntries;
}
public void push(T newEntry) {
// TODO Auto-generated method stub
firstNode = new Node<T>(newEntry, firstNode);
numberOfEntries++;
}
}
Where Node is defined as:
public class Node<T> {
private T data; // Entry in bag
private Node<T> next; // Link to next node
public Node(T dataPortion) {
this(dataPortion, null);
} // end constructor
public Node(T dataPortion, Node<T> nextNode) {
data = dataPortion;
next = nextNode;
} // end constructor
public T getData() {
if (data != null) {
return data;
}
return null;
}
public Node getNext() {
return next;
}
public void setNext(Node<T> newNext) {
next = newNext;
}
}
Below, write a Linked Chain method that will return reference to the middle node. If the Linked Chain has an even number of nodes the "middle node" should be closer to the front.
For example, if the linked chain looked like this:
A --> B --> C --> D
where firstNode referenced the node containing A, this method would return the node containing B
If the linked chain looked like this:
A --> B --> C --> D --> E
where firstNode referenced the node containing A, this method would return the node containing C
If there is one node, the code should return that node. If the linked chain is empty be sure to return null.
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