How do I add values to a Set inside a Map? [closed]

Answer 1

this is just an example full class. just run it and work on it to understand more about this issue

public class Tester5 {

    /**
     * @param args
     */
    public static void main(String[] args) {
        //"apple", "orange", "grape", etc. Each set will contain random numbers: 1, 2, 3, 4, 5, 6, 7, 8, 9

        Random ran = new Random();

        Map> map= new HashMap>();
        String keys[]= {"apple", "orange", "grape"};
        for(String key : keys) {
            Set integers= new HashSet();
            for(int i = 0; i < 10; i++) {
                 integers.add(ran.nextInt(9)+1);
            }
            map.put(key, integers);
        }
        System.out.println(map.toString());

    }

}