package holding;

/**

* RUN:

* javac holding/AddingGroups.java && java holding.AddingGroups

* OUTPUT:

* 1. collection:

* [1, 2, 3, 4, 5]

* 2. collection:

* [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]

* 3. collection:

* [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15]

* 4. collection:

* [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 6, 7, 8, 9, 10]

* 1. list:

* [16, 17, 18, 19, 20]

* 2. list:

* [16, 99, 18, 19, 20]

* Exception in thread "main" java.lang.UnsupportedOperationException

* at java.util.AbstractList.add(Unknown Source)

* at java.util.AbstractList.add(Unknown Source)

* at holding.AddingGroups.main(AddingGroups.java:42)

*/

import java.util.*;

public class AddingGroups {

public static void main(String[] args) {

Collection<Integer> collection = new ArrayList<Integer>(Arrays.asList(1, 2, 3, 4, 5));

Integer[] moreInts = {6, 7, 8, 9, 10};

System.out.println("1. collection:");

System.out.println(collection);

collection.addAll(Arrays.asList(moreInts));

System.out.println("2. collection:");

System.out.println(collection);

Collections.addAll(collection, 11, 12, 13, 14, 15);

System.out.println("3. collection:");

System.out.println(collection);

Collections.addAll(collection, moreInts);

System.out.println("4. collection:");

System.out.println(collection);

List<Integer> list = Arrays.asList(16, 17,18, 19, 20);

System.out.println("1. list:");

System.out.println(list);

list.set(1, 99);

System.out.println("2. list:");

System.out.println(list);

list.add(21); // run-time error here !

}

}