Collections and Generics - SCJP Sun Certified Programmer for Java Platform SE6 - page 472

System.out.print(“\nSorted values: “);
for(int i : values) {
System.out.print(i + “ “);
}
The odd numbers appear before all the even numbers. Here is a sample output of the
previous code:
Initial values: 6 8 8 9 2 1 7 2 3 0 7 2 6 5 2
Sorted values: 9 1 7 3 7 5 6 8 8 2 2 0 2 6 2
Converting an Array to a List
You should be able to convert an array to a list, which is accomplished by using the
static asList method in the Arrays class, as follows:
public static <T> List<T> asList(T... a)
The returned List is fi xed in size and backed by the specifi ed array, meaning that
changes to the List object actually change the array, as long as you do not perform any
operations that modify the length of the List . For example, see if you can determine the
output of the following statements:
String [] array = {“one”, “two”, “three”};
List<String> list = Arrays.asList(array);
list.set(1, “four”);
for(String s : array) {
System.out.println(s);
}
The array contains three String objects, and passing it to asList creates a List with the
same three String objects. Setting index 1 to “four” changes list and array , as shown
by the output of the for-each loop:
one
four
three
Another use of the asList method is to create a fi xed-size List using the variable-
length arguments passed in. For example, the following statement creates a new List
containing seven Integer objects:
List<Integer> numbers = Arrays.<Integer>asList(8, 6, 7, 5, 3, 0, 9);
Just remember that asList returns a fi xed-size List. Attempting to add or remove an
element from numbers results in an UnsupportedOperationException at runtime.