Complete the body of the following methods of class WordListReverser (ignore the keyword static) 1 import java.util.ArrayList; 2 3 public class WordListReverser 4 { 5 6 public static void printReversedListIf(ArrayList<String> words, int minWordLength) 7 { 8 //TODO 9 } 10 11 public static void printReversedList(ArrayList<String> words) 12 { 13 //TODO 14 } 15 16 17 public static ArrayList<String> reverseWordsInList(ArrayList<String> words) 18 { 19 //TODO 20 } 21 22 public static String reverse(String word) 23 { 24 //TODO 25 } 26 } where... • method reverse returns the reversed String of the parameter word. For example, if we pass "Hello" the method return "olleH". • method reverseWordsInList returns an ArrayList containing the reversed words of those contained in the list words passed as a parameter. For example if the list words contains strings ["Hello", "Hi"] the returned list should contain ["olleH", "iH"]. • method printReversedList prints on the console the list of words and their reversed version in the following form: word - reversedWord In case the original list contains a null reference, the output for that line would be <null>. For example if we pass the list words cotaining strings ["Hello", null, "Hi"], the output would be 1 Hello - elloH 2 <null> 3 Hi - iH • method printReversedListIf prints on the console the list of words and their reversed version similarly to method printReversedList, but only for words that have a length ≥ minWordLength or are null. For example if we pass the list words containing strings ["Hello", null, "Hi"] and minWordLength = 3, the output would be 1 Hello - elloH 2 <null> The implementation of the methods should avoid any redundancy and reuse the code already written. NullpointerExceptions (i.e., run-time errors) have to be avoided!
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Complete the body of the following methods of class WordListReverser (ignore the keyword static)
1 import java.util.ArrayList;
2
3 public class WordListReverser
4 {
5
6 public static void printReversedListIf(ArrayList<String> words, int
minWordLength)
7 {
8 //TODO
9 }
10
11 public static void printReversedList(ArrayList<String> words)
12 {
13 //TODO
14 }
15
16
17 public static ArrayList<String> reverseWordsInList(ArrayList<String>
words)
18 {
19 //TODO
20 }
21
22 public static String reverse(String word)
23 {
24 //TODO
25 }
26 }
where...
• method reverse returns the reversed String of the parameter word. For example, if we pass "Hello" the method
return "olleH".
• method reverseWordsInList returns an ArrayList containing the reversed words of those contained in the list
words passed as a parameter. For example if the list words contains strings ["Hello", "Hi"] the returned list
should contain ["olleH", "iH"].
• method printReversedList prints on the console the list of words and their reversed version in the following
form:
word - reversedWord
In case the original list contains a null reference, the output for that line would be <null>. For example if we
pass the list words cotaining strings ["Hello", null, "Hi"], the output would be
1 Hello - elloH
2 <null>
3 Hi - iH
• method printReversedListIf prints on the console the list of words and their reversed version similarly to
method printReversedList, but only for words that have a length ≥ minWordLength or are null. For example
if we pass the list words containing strings ["Hello", null, "Hi"] and minWordLength = 3, the output would
be
1 Hello - elloH
2 <null>
The implementation of the methods should avoid any redundancy and reuse the code already written.
NullpointerExceptions (i.e., run-time errors) have to be avoided!
