Solution for: contains duplicate

Author: edyluisrey

src/leetcode/ContainsDuplicate.java

@@ -0,0 +1,24 @@
+package leetcode;
+
+import java.util.HashMap;
+import java.util.Map;
+
+public class ContainsDuplicate {
+
+	public static void main(String[] args) {
+		ContainsDuplicate test = new ContainsDuplicate();
+		System.out.println(test.containsDuplicate(new int[] {1,2,3,1}));
+
+	}
+	
+	public boolean containsDuplicate(int[] nums) {
+	    Map<Integer,Integer> map = new  HashMap<>();
+	    for(int n:nums){
+	        if(map.containsKey(n))
+	             return true;
+	        map.put(n,0);         
+	    }
+	    return false;
+	}
+
+}