intersection of two int arrays - java

public class Test {

 public static void main(String[] args) {
  printAll(intersection(new int[]{-5} ,new int[]{6,55,66,-4,-5} ) );
 }

 static int [] intersection(int array1[] , int array2[]){

  java.util.ArrayList<Integer> arrayList = new java.util.ArrayList<Integer>();

  for(int outer=0; outer< array1.length ; outer++){

   for(int inner=0; inner < array2.length ; inner++){

    if(array1[outer] == array2[inner]){
     arrayList.add(array1[outer]);
     // or arrayList.add(array2[outer]); will do
    } 
   }
  }

  int intersectionArray[] = new int[arrayList.size()];

  // now add all the elements in arrayList to intersectionArray[] 

  for(int i = 0 ; i  < arrayList.size() ; i++){
   intersectionArray[i] = arrayList.get(i); 
  }

  return intersectionArray;

 }

 static void printAll(int array[]){

  for(int i =0 ; i < array.length ; i++){
   System.out.println(array[i]);
  }
 }

}