Union Size of Array

Author: Vishal023

Hashing/UnionOfArray.java

@@ -0,0 +1,24 @@
+package SummerTrainingGFG.Hashing;
+
+import java.util.HashSet;
+
+/**
+ * @author Vishal Singh
+ * Return distinct union size of the arrays*/
+public class UnionOfArray {
+    static int union(int[] a,int[] b,int aSize,int bSize){
+        HashSet<Integer> set = new HashSet<>();
+        for (int i = 0; i < aSize; i++) {
+            set.add(a[i]);
+        }
+        for (int i = 0; i < bSize; i++) {
+            set.add(b[i]);
+        }
+        return set.size();
+    }
+    public static void main(String[] args) {
+        int[] a = {15,20,5,15};
+        int[] b = {15,15,15,20,10};
+        System.out.println("Distinct Size of Union of array is: "+union(a,b,a.length,b.length));
+    }
+}

README.md

@@ -121,6 +121,7 @@ Java Solution for Data Structures and Algorithms.
 * [Count Distinct Elements](Hashing/CountDistinctElements.java)
 * [Frequency Of Array Elements](Hashing/FrequencyOfArrayElements.java)
 * [Intersection Of Array](Hashing/InsertionOfArray.java)
+* [Union of Array](Hashing/UnionOfArray.java)
 
 ### `NOTE: Raise an issue if any program doesn't work.`
 ### `More Topics to be added soon`