初学者递归问题求解

存在两个数组  int[] a1 = {2, 6, 6, 7, 8, 19, 23, 35, 53};
         int[] a2 = {2, 6, 7, 9, 17, 21, 35, 53};
现在希望不用循环，用递归算法找出相同元素，通过System.out.println(Arrays.toString(ArrayIntersect.arrayIntersection(a1, a2)));
希望输出 [2, 6, 6, 7, 35, 53]

public class ArrayIntersect {
  public static int[] arrayIntersection(int[] a, int[] b) {
      int[] c = new int[0];  
      int i=a.length;
          if(a[0]==b[0]&&i>0){
              int[] temp = Arrays.copyOf(c, c.length + 1);
              temp[c.length] = a[0];
              c = temp;
              a=Arrays.copyOfRange(a, 1, a.length);
              return arrayIntersection(a,b);
          }else if(a[0]!=b[0]&&i>0){
              boolean t;
              t=arrayb(a[0],b);
              if(t=true){
                  a=Arrays.copyOfRange(a, 1, a.length);
                  int[] temp = Arrays.copyOf(c, c.length + 1);
                  temp[c.length] = a[0];
                  c = temp;
                  return arrayIntersection(a,b);
              }else{
                  a=Arrays.copyOfRange(a, 1, a.length);
                  return arrayIntersection(a,b);
              }
          }else{
              return c;      
          }
  }

  public static boolean arrayb(int a,int[]b){
    if(b.length>0){      
            if(a!=b[0]){
              b=Arrays.copyOfRange(b, 1, b.length);
              return arrayb(a,b);
          }else{
              return true;
          }
    }else{
        return false;
    }
  }

}
思路是希望通过每次复制缩短a数组，用a[0]和b数组进行比较，但应该如何处理b数组，应该如何修改上面错误的代码，或者说有没有新的利用递归方法解此题的思路，求指导，谢谢！！！