added a java program for Intersection of two Integer arrays

.gitignore

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+.DS_Store

Intersection of two Integer arrays/arrayintersection.java

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+//by Siddharth Saurabh (https://github.com/siddhartthecoder)
+   import java.util.*;
+
+   public class arrayintersection {
+
+    public static void main(String[] args) {
+
+     Scanner sc = new Scanner(System.in);
+
+     System.out.println("enter number of elements in first array");
+
+     int n = sc.nextInt();
+
+     int arr1[] = new int[n];
+
+     System.out.println("enter elements");
+
+     for (int i = 0; i < n; i++) { //for reading array 1
+      arr1[i] = sc.nextInt();
+
+     }
+
+     System.out.println("enter number of elements in second array");
+
+     int m = sc.nextInt();
+
+     int arr2[] = new int[m];
+
+     System.out.println("enter elements");
+
+     for (int i = 0; i < m; i++) { //for reading array 2
+      arr2[i] = sc.nextInt();
+
+     }
+     System.out.println("The intersection is :");
+     //Intersection logic
+     for (int i = 0; i < arr1.length; i++) {
+      for (int j = 0; j < arr2.length; j++) {
+       if (arr1[i] == arr2[j]) {
+        System.out.print(" " + arr2[j] + " ");
+       }
+      }
+     }
+     System.out.println("");
+
+    }
+
+   }