Searching from array1 to array2 in the fastest way beside using looping

Question

I have 2 array 1d of object, what i want to do is searching data "a" from array1 in array2 in the fastest method because the amount of data in each array reached almost 10000 data.
thanks.

Answer 1

I store my data in a LinkedHashSet and HashSet. I changed it into an array of Object using method toArray. Example :
LinkedHashSet a;
a.toArray() -> this method changed my LinkedHashSet into an Array of Object.
the data in this structure data is not sorted, but i have to use all the data without sorting it.
i think 10000 is quite an amount couse i must use 2 looping to find data from array1 in array2
this is my program :
private boolean removeCrawledLinks(LinkedHashSet toCrawllinks,HashSet crawledLinks_)
          String filename1, filename2;
          FilenameGenerator fng = new FilenameGenerator();
          Object [] array1 = crawledLinks_.toArray();
          Object [] array2 = toCrawllinks_.toArray();
          for (int i = 0; i < array1.length; i++)
               filename1 = array1.toString();
               for (int j = 0; j < array2.length; j++)
                    filename2 = array2[j].toString();
                    if (filename1.equals(filename2))
return true;
this method is spending lot of time, i need more efficient way
thanks