Description D.W. 2007-09-01 16:17:14 EDT

package array;

import java.util.*;

public class ArrayListTest {
	public static void main(String[] args) {
		ArrayList al = new ArrayList();
		al.add("Mike");
		al.add("John");
		al.add("David");

		// ArrayList toArray() returns an Object[] array.
		Object[] objs = al.toArray();

		// fixed List!!! be careful.
		List l = Arrays.asList(objs);
		l.add("Eric");
		/*
		 * Arrays asList() returns a fixed-size list 
		 * Eclipse 3.3 doesn't flag a error for the above l.add("Eric"). 
		 * so I got an exception during the execution
		 * Exception in thread "main"
		 * java.lang.UnsupportedOperationException at
		 * java.util.AbstractList.add(Unknown Source) at
		 * java.util.AbstractList.add(Unknown Source) at
		 * array.ArrayListTest.main(ArrayListTest.java:17)
		 * 
		 */
		System.out.println(l);

	}
}