27 lines
657 B
Java
27 lines
657 B
Java
package DataStructures.Lists;
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public class CountSinglyLinkedListRecursion extends SinglyLinkedList {
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public static void main(String[] args) {
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CountSinglyLinkedListRecursion list = new CountSinglyLinkedListRecursion();
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for (int i = 1; i <= 5; ++i) {
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list.insert(i);
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}
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assert list.count() == 5;
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}
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/**
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* Calculate the count of the list manually using recursion.
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*
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* @param head head of the list.
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* @return count of the list.
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*/
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private int countRecursion(Node head) {
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return head == null ? 0 : 1 + countRecursion(head.next);
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}
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@Override
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public int count() {
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return countRecursion(getHead());
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}
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}
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