Java Programs easy way

package New;

import java.util.ArrayList;

import java.util.Collections;

import java.util.Comparator;

public class Prog11 {

                static int op = 0;

                public static void abc(ArrayList<String> al, String str) {

                                Comparator com = Collections.reverseOrder();

                                Collections.sort(al, com);

                                for (int i = 0; i < al.size(); i++) {

                                                if (al.get(i) == str)

                                                                op = i + 1;

                                }

                }

                public static void main(String[] args) {

                                ArrayList<String> al = new ArrayList<String>();

                                String str = "ivory";

                                al.add("red");

                                al.add("green");

                                al.add("blue");

                                al.add("ivory");

                                abc(al, str);

                                System.out.println(op);

}

}