LISTS, STACKS, QUEUES, AND PRIORITY QUEUES - Introduction to Java Programming: Comprehensive Version - page 775

System.out.println( "(2) Index: " + Collections.binarySearch(list1, 9 ));

List<String> list2 = Arrays.asList( "blue" , "green" , "red" );
System.out.println( "(3) Index: " +
Collections.binarySearch(list2, "red" ));
System.out.println( "(4) Index: " +
Collections.binarySearch(list2, "cyan" ));

The output of the preceding code is:

(1) Index: 2
(2) Index: -4
(3) Index: 2
(4) Index: -2

You can use the reverse method to reverse the elements in a list. For example, the following
code displays [blue, green, red, yellow] .

reverse

List<String> list = Arrays.asList( "yellow" , "red" , "green" , "blue" );
Collections.reverse(list);
System.out.println(list);

You can use the shuffle(List) method to randomly reorder the elements in a list. For
example, the following code shuffles the elements in list .

shuffle

List<String> list = Arrays.asList( "yellow" , "red" , "green" , "blue" );
Collections.shuffle(list);
System.out.println(list);

You can also use the shuffle(List, Random) method to randomly reorder the elements in
a list with a specified Random object. Using a specified Random object is useful to generate a
list with identical sequences of elements for the same original list. For example, the following
code shuffles the elements in list .

List<String> list1 = Arrays.asList( "yellow" , "red" , "green" , "blue" );
List<String> list2 = Arrays.asList( "yellow" , "red" , "green" , "blue" );
Collections.shuffle(list1, new Random( 20 ));
Collections.shuffle(list2, new Random( 20 ));
System.out.println(list1);
System.out.println(list2);

You will see that list1 and list2 have the same sequence of elements before and after the
shuffling.
You can use the copy(det, src) method to copy all the elements from a source list to a
destination list on the same index. The destination list must be as long as the source list. If it is
longer, the remaining elements in the source list are not affected. For example, the following
code copies list2 to list1 .

copy

List<String> list1 = Arrays.asList( "yellow" , "red" , "green" , "blue" );
List<String> list2 = Arrays.asList( "white" , "black" );
Collections.copy(list1, list2);
System.out.println(list1);