Rename the common modules.

codes/java/utils/ListNode.java

@@ -0,0 +1,36 @@
+/**
+ * File: ListNode.java
+ * Created Time: 2022-11-25
+ * Author: Krahets (krahets@163.com)
+ */
+
+package utils;
+
+/* Definition for a singly-linked list node */
+public class ListNode {
+    public int val;
+    public ListNode next;
+
+    public ListNode(int x) {
+        val = x;
+    }
+
+    /* Generate a linked list with an array */
+    public static ListNode arrToLinkedList(int[] arr) {
+        ListNode dum = new ListNode(0);
+        ListNode head = dum;
+        for (int val : arr) {
+            head.next = new ListNode(val);
+            head = head.next;
+        }
+        return dum.next;
+    }
+
+    /* Get a list node with specific value from a linked list */
+    public static ListNode getListNode(ListNode head, int val) {
+        while (head != null && head.val != val) {
+            head = head.next;
+        }
+        return head;
+    }
+}