Updated longest consecutive sequence

Author: FreeTymeKiyan

Hard/LongestConsecutiveSeq.java

@@ -1,4 +1,4 @@
-import java.util.HashMap;
+import java.util.*;
 
 /**
  * Given an unsorted array of integers, find the length of the longest
@@ -15,8 +15,9 @@
  */
 class LongestConsecutiveSeq {
     public static void main(String[] args) {
+        LongestConsecutiveSeq l = new LongestConsecutiveSeq();
         int[] a = {100, 4, 200, 1, 3, 2};
-        System.out.println(longestConsecutive(a));
+        System.out.println(l.longestConsecutive(a));
     }
 
     /**
@@ -27,7 +28,7 @@ public static void main(String[] args) {
      * Put all possible ranges into map
      * including num[i] ~ num[i], low ~ upp, upp ~ low
      */
-    public static int longestConsecutive(int[] num) {
+    public int longestConsecutive(int[] num) {
         if (num == null || num.length == 0) return 0;
         Map<Integer, Integer> map = new HashMap<Integer, Integer>();
         int maxLen = 0;
@@ -45,4 +46,4 @@ public static int longestConsecutive(int[] num) {
         }
         return maxLen;
     }
-}
+}