IN JAVA. please post as copyable text code, Not an image.

1. Collections Programming: Write a method called retainEvenLength that takes a Set of strings as a parameter and that retains only the strings of even length from the set, removing all other strings. For example, if a Set called s stores the following values:

[I, Sam, am, and, do, eggs, green, ham, like, not, them] and the following call is made:

retainEvenLength(s); then s should store the following values after the call:

[am, do, eggs, like, them]

Turn in just the code for this method and your console output. I will test your code with the examples values above.

2. Collections Programming: Given this Test Program:

public class EC2 { public static void main(String[] args) {

}

String[] words = {"to", "be", "or", "not", "to", "be", "Hamlet"}; ArrayList al = new ArrayList(); for (String w: words) {

al.add(w);

} System.out.println(al);swapPairs(al); System.out.println(al);

public static void swapPairs(ArrayList al) { // >>>>>>>>Your code goes here<<<< return al;

} }

Fill in the swapPairs method so that pairs of words are swapped in place in the ArrayList. Your program should generate this output from the input in main:

[be, to, not, or, be, to, Hamlet]