How to find common elements between two arrays in java?

Question:

How to find common elements in two different arrays?

Code:

public class CommonElements {
 
  public static void main(String a[]){
    int[] arr1 = {2,4,6,8};
    int[] arr2 = {1,2,3,4,5,6,7,8,9};
 
    for(int i=0;i<arr1.length;i++){
      for(int j=0;j<arr2.length;j++){
        if(arr1[i]==arr2[j]){
          System.out.println(arr1[i]);
        }
      }
    }
 
  }
}

Output:

$ java CommonElements
2
4
6
8