ArrayList filter based on some condition in android

Question

I have an ArrayList in android which contains several names. Suppose user typed R, so I want to calculate how many names are there in the ArrayList which starts with R. for example if arraylist contains Ashok, Bimal, Ram, Raju, sunita then it should return 2 as there are 2 names starts with R

Answer 1

    int count = 0;
    ArrayList<String> _list;//ur arraylist with names
    for (String names : _list) {
        if (names.startsWith("R")) {
            count++;
        }

    }
    System.out.println(count);