Java/src/main/java/com/examplehub/utils/NodeUtils.java at master · JavaCimcoz/Java · GitHub

33 lines (30 loc) · 793 Bytes

package com.examplehub.utils;

import com.examplehub.leetcode.ListNode;

import java.util.StringJoiner;

public class NodeUtils {

public static String toString(ListNode head) {

ListNode current = head;

StringJoiner joiner = new StringJoiner("->");

while (current != null) {

joiner.add(current.val + "");

current = current.next;

}

joiner.add("NULL");

return joiner.toString();

}

public static ListNode makeList(int... numbers) {

ListNode head = null;

ListNode tail = null;

for (int number : numbers) {

ListNode newNode = new ListNode(number);

newNode.next = null;

if (head == null) {

tail = head = newNode;

} else {

tail.next = newNode;

tail = tail.next;

}

return head;

}

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