Question

I am working on android applications. I created two pages i.e Page1 and Page2. Page2 contains an arraylist with repeated values. I am passing a value from page1 and
I want to find the number of occurences of the value(coming from page1) in the arraylist in page2. Please suggest what should I have been done to do that task.

Thanks in advance

Answer 1

Collection.frequency() is what you needed,

Try something like,

ArrayList<Integer> intList // your list

Set<Integer> Values = new HashSet<Integer>;
Values.addAll(intList); // all duplicates removed.

for (Integer i : Values) {

 int occurrences = Collections.frequency(intList, i);
 Log.e(i ," occurs " + occurences + " times.");
}