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heptalophos's solution

to Beer Song in the Java Track

Published at Oct 16 2019 · 0 comments
Instructions
Test suite
Solution

Recite the lyrics to that beloved classic, that field-trip favorite: 99 Bottles of Beer on the Wall.

Note that not all verses are identical.

99 bottles of beer on the wall, 99 bottles of beer.
Take one down and pass it around, 98 bottles of beer on the wall.

98 bottles of beer on the wall, 98 bottles of beer.
Take one down and pass it around, 97 bottles of beer on the wall.

97 bottles of beer on the wall, 97 bottles of beer.
Take one down and pass it around, 96 bottles of beer on the wall.

96 bottles of beer on the wall, 96 bottles of beer.
Take one down and pass it around, 95 bottles of beer on the wall.

95 bottles of beer on the wall, 95 bottles of beer.
Take one down and pass it around, 94 bottles of beer on the wall.

94 bottles of beer on the wall, 94 bottles of beer.
Take one down and pass it around, 93 bottles of beer on the wall.

93 bottles of beer on the wall, 93 bottles of beer.
Take one down and pass it around, 92 bottles of beer on the wall.

92 bottles of beer on the wall, 92 bottles of beer.
Take one down and pass it around, 91 bottles of beer on the wall.

91 bottles of beer on the wall, 91 bottles of beer.
Take one down and pass it around, 90 bottles of beer on the wall.

90 bottles of beer on the wall, 90 bottles of beer.
Take one down and pass it around, 89 bottles of beer on the wall.

89 bottles of beer on the wall, 89 bottles of beer.
Take one down and pass it around, 88 bottles of beer on the wall.

88 bottles of beer on the wall, 88 bottles of beer.
Take one down and pass it around, 87 bottles of beer on the wall.

87 bottles of beer on the wall, 87 bottles of beer.
Take one down and pass it around, 86 bottles of beer on the wall.

86 bottles of beer on the wall, 86 bottles of beer.
Take one down and pass it around, 85 bottles of beer on the wall.

85 bottles of beer on the wall, 85 bottles of beer.
Take one down and pass it around, 84 bottles of beer on the wall.

84 bottles of beer on the wall, 84 bottles of beer.
Take one down and pass it around, 83 bottles of beer on the wall.

83 bottles of beer on the wall, 83 bottles of beer.
Take one down and pass it around, 82 bottles of beer on the wall.

82 bottles of beer on the wall, 82 bottles of beer.
Take one down and pass it around, 81 bottles of beer on the wall.

81 bottles of beer on the wall, 81 bottles of beer.
Take one down and pass it around, 80 bottles of beer on the wall.

80 bottles of beer on the wall, 80 bottles of beer.
Take one down and pass it around, 79 bottles of beer on the wall.

79 bottles of beer on the wall, 79 bottles of beer.
Take one down and pass it around, 78 bottles of beer on the wall.

78 bottles of beer on the wall, 78 bottles of beer.
Take one down and pass it around, 77 bottles of beer on the wall.

77 bottles of beer on the wall, 77 bottles of beer.
Take one down and pass it around, 76 bottles of beer on the wall.

76 bottles of beer on the wall, 76 bottles of beer.
Take one down and pass it around, 75 bottles of beer on the wall.

75 bottles of beer on the wall, 75 bottles of beer.
Take one down and pass it around, 74 bottles of beer on the wall.

74 bottles of beer on the wall, 74 bottles of beer.
Take one down and pass it around, 73 bottles of beer on the wall.

73 bottles of beer on the wall, 73 bottles of beer.
Take one down and pass it around, 72 bottles of beer on the wall.

72 bottles of beer on the wall, 72 bottles of beer.
Take one down and pass it around, 71 bottles of beer on the wall.

71 bottles of beer on the wall, 71 bottles of beer.
Take one down and pass it around, 70 bottles of beer on the wall.

70 bottles of beer on the wall, 70 bottles of beer.
Take one down and pass it around, 69 bottles of beer on the wall.

69 bottles of beer on the wall, 69 bottles of beer.
Take one down and pass it around, 68 bottles of beer on the wall.

68 bottles of beer on the wall, 68 bottles of beer.
Take one down and pass it around, 67 bottles of beer on the wall.

67 bottles of beer on the wall, 67 bottles of beer.
Take one down and pass it around, 66 bottles of beer on the wall.

66 bottles of beer on the wall, 66 bottles of beer.
Take one down and pass it around, 65 bottles of beer on the wall.

65 bottles of beer on the wall, 65 bottles of beer.
Take one down and pass it around, 64 bottles of beer on the wall.

64 bottles of beer on the wall, 64 bottles of beer.
Take one down and pass it around, 63 bottles of beer on the wall.

63 bottles of beer on the wall, 63 bottles of beer.
Take one down and pass it around, 62 bottles of beer on the wall.

62 bottles of beer on the wall, 62 bottles of beer.
Take one down and pass it around, 61 bottles of beer on the wall.

61 bottles of beer on the wall, 61 bottles of beer.
Take one down and pass it around, 60 bottles of beer on the wall.

60 bottles of beer on the wall, 60 bottles of beer.
Take one down and pass it around, 59 bottles of beer on the wall.

59 bottles of beer on the wall, 59 bottles of beer.
Take one down and pass it around, 58 bottles of beer on the wall.

58 bottles of beer on the wall, 58 bottles of beer.
Take one down and pass it around, 57 bottles of beer on the wall.

57 bottles of beer on the wall, 57 bottles of beer.
Take one down and pass it around, 56 bottles of beer on the wall.

56 bottles of beer on the wall, 56 bottles of beer.
Take one down and pass it around, 55 bottles of beer on the wall.

55 bottles of beer on the wall, 55 bottles of beer.
Take one down and pass it around, 54 bottles of beer on the wall.

54 bottles of beer on the wall, 54 bottles of beer.
Take one down and pass it around, 53 bottles of beer on the wall.

53 bottles of beer on the wall, 53 bottles of beer.
Take one down and pass it around, 52 bottles of beer on the wall.

52 bottles of beer on the wall, 52 bottles of beer.
Take one down and pass it around, 51 bottles of beer on the wall.

51 bottles of beer on the wall, 51 bottles of beer.
Take one down and pass it around, 50 bottles of beer on the wall.

50 bottles of beer on the wall, 50 bottles of beer.
Take one down and pass it around, 49 bottles of beer on the wall.

49 bottles of beer on the wall, 49 bottles of beer.
Take one down and pass it around, 48 bottles of beer on the wall.

48 bottles of beer on the wall, 48 bottles of beer.
Take one down and pass it around, 47 bottles of beer on the wall.

47 bottles of beer on the wall, 47 bottles of beer.
Take one down and pass it around, 46 bottles of beer on the wall.

46 bottles of beer on the wall, 46 bottles of beer.
Take one down and pass it around, 45 bottles of beer on the wall.

45 bottles of beer on the wall, 45 bottles of beer.
Take one down and pass it around, 44 bottles of beer on the wall.

44 bottles of beer on the wall, 44 bottles of beer.
Take one down and pass it around, 43 bottles of beer on the wall.

43 bottles of beer on the wall, 43 bottles of beer.
Take one down and pass it around, 42 bottles of beer on the wall.

42 bottles of beer on the wall, 42 bottles of beer.
Take one down and pass it around, 41 bottles of beer on the wall.

41 bottles of beer on the wall, 41 bottles of beer.
Take one down and pass it around, 40 bottles of beer on the wall.

40 bottles of beer on the wall, 40 bottles of beer.
Take one down and pass it around, 39 bottles of beer on the wall.

39 bottles of beer on the wall, 39 bottles of beer.
Take one down and pass it around, 38 bottles of beer on the wall.

38 bottles of beer on the wall, 38 bottles of beer.
Take one down and pass it around, 37 bottles of beer on the wall.

37 bottles of beer on the wall, 37 bottles of beer.
Take one down and pass it around, 36 bottles of beer on the wall.

36 bottles of beer on the wall, 36 bottles of beer.
Take one down and pass it around, 35 bottles of beer on the wall.

35 bottles of beer on the wall, 35 bottles of beer.
Take one down and pass it around, 34 bottles of beer on the wall.

34 bottles of beer on the wall, 34 bottles of beer.
Take one down and pass it around, 33 bottles of beer on the wall.

33 bottles of beer on the wall, 33 bottles of beer.
Take one down and pass it around, 32 bottles of beer on the wall.

32 bottles of beer on the wall, 32 bottles of beer.
Take one down and pass it around, 31 bottles of beer on the wall.

31 bottles of beer on the wall, 31 bottles of beer.
Take one down and pass it around, 30 bottles of beer on the wall.

30 bottles of beer on the wall, 30 bottles of beer.
Take one down and pass it around, 29 bottles of beer on the wall.

29 bottles of beer on the wall, 29 bottles of beer.
Take one down and pass it around, 28 bottles of beer on the wall.

28 bottles of beer on the wall, 28 bottles of beer.
Take one down and pass it around, 27 bottles of beer on the wall.

27 bottles of beer on the wall, 27 bottles of beer.
Take one down and pass it around, 26 bottles of beer on the wall.

26 bottles of beer on the wall, 26 bottles of beer.
Take one down and pass it around, 25 bottles of beer on the wall.

25 bottles of beer on the wall, 25 bottles of beer.
Take one down and pass it around, 24 bottles of beer on the wall.

24 bottles of beer on the wall, 24 bottles of beer.
Take one down and pass it around, 23 bottles of beer on the wall.

23 bottles of beer on the wall, 23 bottles of beer.
Take one down and pass it around, 22 bottles of beer on the wall.

22 bottles of beer on the wall, 22 bottles of beer.
Take one down and pass it around, 21 bottles of beer on the wall.

21 bottles of beer on the wall, 21 bottles of beer.
Take one down and pass it around, 20 bottles of beer on the wall.

20 bottles of beer on the wall, 20 bottles of beer.
Take one down and pass it around, 19 bottles of beer on the wall.

19 bottles of beer on the wall, 19 bottles of beer.
Take one down and pass it around, 18 bottles of beer on the wall.

18 bottles of beer on the wall, 18 bottles of beer.
Take one down and pass it around, 17 bottles of beer on the wall.

17 bottles of beer on the wall, 17 bottles of beer.
Take one down and pass it around, 16 bottles of beer on the wall.

16 bottles of beer on the wall, 16 bottles of beer.
Take one down and pass it around, 15 bottles of beer on the wall.

15 bottles of beer on the wall, 15 bottles of beer.
Take one down and pass it around, 14 bottles of beer on the wall.

14 bottles of beer on the wall, 14 bottles of beer.
Take one down and pass it around, 13 bottles of beer on the wall.

13 bottles of beer on the wall, 13 bottles of beer.
Take one down and pass it around, 12 bottles of beer on the wall.

12 bottles of beer on the wall, 12 bottles of beer.
Take one down and pass it around, 11 bottles of beer on the wall.

11 bottles of beer on the wall, 11 bottles of beer.
Take one down and pass it around, 10 bottles of beer on the wall.

10 bottles of beer on the wall, 10 bottles of beer.
Take one down and pass it around, 9 bottles of beer on the wall.

9 bottles of beer on the wall, 9 bottles of beer.
Take one down and pass it around, 8 bottles of beer on the wall.

8 bottles of beer on the wall, 8 bottles of beer.
Take one down and pass it around, 7 bottles of beer on the wall.

7 bottles of beer on the wall, 7 bottles of beer.
Take one down and pass it around, 6 bottles of beer on the wall.

6 bottles of beer on the wall, 6 bottles of beer.
Take one down and pass it around, 5 bottles of beer on the wall.

5 bottles of beer on the wall, 5 bottles of beer.
Take one down and pass it around, 4 bottles of beer on the wall.

4 bottles of beer on the wall, 4 bottles of beer.
Take one down and pass it around, 3 bottles of beer on the wall.

3 bottles of beer on the wall, 3 bottles of beer.
Take one down and pass it around, 2 bottles of beer on the wall.

2 bottles of beer on the wall, 2 bottles of beer.
Take one down and pass it around, 1 bottle of beer on the wall.

1 bottle of beer on the wall, 1 bottle of beer.
Take it down and pass it around, no more bottles of beer on the wall.

No more bottles of beer on the wall, no more bottles of beer.
Go to the store and buy some more, 99 bottles of beer on the wall.

For bonus points

Did you get the tests passing and the code clean? If you want to, these are some additional things you could try:

  • Remove as much duplication as you possibly can.
  • Optimize for readability, even if it means introducing duplication.
  • If you've removed all the duplication, do you have a lot of conditionals? Try replacing the conditionals with polymorphism, if it applies in this language. How readable is it?

Then please share your thoughts in a comment on the submission. Did this experiment make the code better? Worse? Did you learn anything from it?

Setup

Go through the setup instructions for Java to install the necessary dependencies:

https://exercism.io/tracks/java/installation

Running the tests

You can run all the tests for an exercise by entering the following in your terminal:

$ gradle test

Use gradlew.bat if you're on Windows

In the test suites all tests but the first have been skipped.

Once you get a test passing, you can enable the next one by removing the @Ignore("Remove to run test") annotation.

Source

Learn to Program by Chris Pine http://pine.fm/LearnToProgram/?Chapter=06

Submitting Incomplete Solutions

It's possible to submit an incomplete solution so you can see how others have completed the exercise.

BeerSongTest.java

import org.junit.Test;
import org.junit.Ignore;
import org.junit.Before;

import static org.junit.Assert.assertEquals;

public class BeerSongTest {

    private BeerSong beerSong;

    @Before
    public void setup() {
        beerSong = new BeerSong();
    }

    @Test
    public void singFirstVerse() {
        assertEquals("99 bottles of beer on the wall, 99 bottles of beer.\n" +
                        "Take one down and pass it around, 98 bottles of beer on the wall.\n\n",
                beerSong.sing(99, 1));
    }

    @Ignore("Remove to run test")
    @Test
    public void singLastGenericVerse() {
        assertEquals("3 bottles of beer on the wall, 3 bottles of beer.\n" +
                        "Take one down and pass it around, 2 bottles of beer on the wall.\n\n",
                beerSong.sing(3, 1));
    }

    @Ignore("Remove to run test")
    @Test
    public void verseWithTwoBottles() {
        assertEquals("2 bottles of beer on the wall, 2 bottles of beer.\n" +
                        "Take one down and pass it around, 1 bottle of beer on the wall.\n\n",
                beerSong.sing(2, 1));
    }

    @Ignore("Remove to run test")
    @Test
    public void verseWithOneBottle() {
        assertEquals("1 bottle of beer on the wall, 1 bottle of beer.\n" +
                        "Take it down and pass it around, no more bottles of beer on the wall.\n\n",
                beerSong.sing(1, 1));
    }

    @Ignore("Remove to run test")
    @Test
    public void verseWithZeroBottles() {
        assertEquals("No more bottles of beer on the wall, no more bottles of beer.\n" +
                        "Go to the store and buy some more, 99 bottles of beer on the wall.\n\n",
                beerSong.sing(0, 1));
    }

    @Ignore("Remove to run test")
    @Test
    public void singFirstTwoVerses() {
        assertEquals("99 bottles of beer on the wall, 99 bottles of beer.\n" +
                        "Take one down and pass it around, 98 bottles of beer on the wall.\n\n" +
                        "98 bottles of beer on the wall, 98 bottles of beer.\n" +
                        "Take one down and pass it around, 97 bottles of beer on the wall.\n\n",
                beerSong.sing(99, 2));
    }

    @Ignore("Remove to run test")
    @Test
    public void singLastThreeVerses() {
        assertEquals("2 bottles of beer on the wall, 2 bottles of beer.\n" +
                        "Take one down and pass it around, 1 bottle of beer on the wall.\n\n" +
                        "1 bottle of beer on the wall, 1 bottle of beer.\n" +
                        "Take it down and pass it around, no more bottles of beer on the wall.\n\n" +
                        "No more bottles of beer on the wall, no more bottles of beer.\n" +
                        "Go to the store and buy some more, 99 bottles of beer on the wall.\n\n",
                beerSong.sing(2, 3));
    }

    @Ignore("Remove to run test")
    @Test
    public void singEntireSong() {
        assertEquals("99 bottles of beer on the wall, 99 bottles of beer.\nTake one down and pass it around, " +
                     "98 bottles of beer on the wall.\n\n" +
                     "98 bottles of beer on the wall, 98 bottles of beer.\nTake one down and pass it around, " +
                     "97 bottles of beer on the wall.\n\n" +
                     "97 bottles of beer on the wall, 97 bottles of beer.\nTake one down and pass it around, " +
                     "96 bottles of beer on the wall.\n\n" +
                     "96 bottles of beer on the wall, 96 bottles of beer.\nTake one down and pass it around, " +
                     "95 bottles of beer on the wall.\n\n" +
                     "95 bottles of beer on the wall, 95 bottles of beer.\nTake one down and pass it around, " +
                     "94 bottles of beer on the wall.\n\n" +
                     "94 bottles of beer on the wall, 94 bottles of beer.\nTake one down and pass it around, " +
                     "93 bottles of beer on the wall.\n\n" +
                     "93 bottles of beer on the wall, 93 bottles of beer.\nTake one down and pass it around, " +
                     "92 bottles of beer on the wall.\n\n" +
                     "92 bottles of beer on the wall, 92 bottles of beer.\nTake one down and pass it around, " +
                     "91 bottles of beer on the wall.\n\n" +
                     "91 bottles of beer on the wall, 91 bottles of beer.\nTake one down and pass it around, " +
                     "90 bottles of beer on the wall.\n\n" +
                     "90 bottles of beer on the wall, 90 bottles of beer.\nTake one down and pass it around, " +
                     "89 bottles of beer on the wall.\n\n" +
                     "89 bottles of beer on the wall, 89 bottles of beer.\nTake one down and pass it around, " +
                     "88 bottles of beer on the wall.\n\n" +
                     "88 bottles of beer on the wall, 88 bottles of beer.\nTake one down and pass it around, " +
                     "87 bottles of beer on the wall.\n\n" +
                     "87 bottles of beer on the wall, 87 bottles of beer.\nTake one down and pass it around, " +
                     "86 bottles of beer on the wall.\n\n" +
                     "86 bottles of beer on the wall, 86 bottles of beer.\nTake one down and pass it around, " +
                     "85 bottles of beer on the wall.\n\n" +
                     "85 bottles of beer on the wall, 85 bottles of beer.\nTake one down and pass it around, " +
                     "84 bottles of beer on the wall.\n\n" +
                     "84 bottles of beer on the wall, 84 bottles of beer.\nTake one down and pass it around, " +
                     "83 bottles of beer on the wall.\n\n" +
                     "83 bottles of beer on the wall, 83 bottles of beer.\nTake one down and pass it around, " +
                     "82 bottles of beer on the wall.\n\n" +
                     "82 bottles of beer on the wall, 82 bottles of beer.\nTake one down and pass it around, " +
                     "81 bottles of beer on the wall.\n\n" +
                     "81 bottles of beer on the wall, 81 bottles of beer.\nTake one down and pass it around, " +
                     "80 bottles of beer on the wall.\n\n" +
                     "80 bottles of beer on the wall, 80 bottles of beer.\nTake one down and pass it around, " +
                     "79 bottles of beer on the wall.\n\n" +
                     "79 bottles of beer on the wall, 79 bottles of beer.\nTake one down and pass it around, " +
                     "78 bottles of beer on the wall.\n\n" +
                     "78 bottles of beer on the wall, 78 bottles of beer.\nTake one down and pass it around, " +
                     "77 bottles of beer on the wall.\n\n" +
                     "77 bottles of beer on the wall, 77 bottles of beer.\nTake one down and pass it around, " +
                     "76 bottles of beer on the wall.\n\n" +
                     "76 bottles of beer on the wall, 76 bottles of beer.\nTake one down and pass it around, " +
                     "75 bottles of beer on the wall.\n\n" +
                     "75 bottles of beer on the wall, 75 bottles of beer.\nTake one down and pass it around, " +
                     "74 bottles of beer on the wall.\n\n" +
                     "74 bottles of beer on the wall, 74 bottles of beer.\nTake one down and pass it around, " +
                     "73 bottles of beer on the wall.\n\n" +
                     "73 bottles of beer on the wall, 73 bottles of beer.\nTake one down and pass it around, " +
                     "72 bottles of beer on the wall.\n\n" +
                     "72 bottles of beer on the wall, 72 bottles of beer.\nTake one down and pass it around, " +
                     "71 bottles of beer on the wall.\n\n" +
                     "71 bottles of beer on the wall, 71 bottles of beer.\nTake one down and pass it around, " +
                     "70 bottles of beer on the wall.\n\n" +
                     "70 bottles of beer on the wall, 70 bottles of beer.\nTake one down and pass it around, " +
                     "69 bottles of beer on the wall.\n\n" +
                     "69 bottles of beer on the wall, 69 bottles of beer.\nTake one down and pass it around, " +
                     "68 bottles of beer on the wall.\n\n" +
                     "68 bottles of beer on the wall, 68 bottles of beer.\nTake one down and pass it around, " +
                     "67 bottles of beer on the wall.\n\n" +
                     "67 bottles of beer on the wall, 67 bottles of beer.\nTake one down and pass it around, " +
                     "66 bottles of beer on the wall.\n\n" +
                     "66 bottles of beer on the wall, 66 bottles of beer.\nTake one down and pass it around, " +
                     "65 bottles of beer on the wall.\n\n" +
                     "65 bottles of beer on the wall, 65 bottles of beer.\nTake one down and pass it around, " +
                     "64 bottles of beer on the wall.\n\n" +
                     "64 bottles of beer on the wall, 64 bottles of beer.\nTake one down and pass it around, " +
                     "63 bottles of beer on the wall.\n\n" +
                     "63 bottles of beer on the wall, 63 bottles of beer.\nTake one down and pass it around, " +
                     "62 bottles of beer on the wall.\n\n" +
                     "62 bottles of beer on the wall, 62 bottles of beer.\nTake one down and pass it around, " +
                     "61 bottles of beer on the wall.\n\n" +
                     "61 bottles of beer on the wall, 61 bottles of beer.\nTake one down and pass it around, " +
                     "60 bottles of beer on the wall.\n\n" +
                     "60 bottles of beer on the wall, 60 bottles of beer.\nTake one down and pass it around, " +
                     "59 bottles of beer on the wall.\n\n" +
                     "59 bottles of beer on the wall, 59 bottles of beer.\nTake one down and pass it around, " +
                     "58 bottles of beer on the wall.\n\n" +
                     "58 bottles of beer on the wall, 58 bottles of beer.\nTake one down and pass it around, " +
                     "57 bottles of beer on the wall.\n\n" +
                     "57 bottles of beer on the wall, 57 bottles of beer.\nTake one down and pass it around, " +
                     "56 bottles of beer on the wall.\n\n" +
                     "56 bottles of beer on the wall, 56 bottles of beer.\nTake one down and pass it around, " +
                     "55 bottles of beer on the wall.\n\n" +
                     "55 bottles of beer on the wall, 55 bottles of beer.\nTake one down and pass it around, " +
                     "54 bottles of beer on the wall.\n\n" +
                     "54 bottles of beer on the wall, 54 bottles of beer.\nTake one down and pass it around, " +
                     "53 bottles of beer on the wall.\n\n" +
                     "53 bottles of beer on the wall, 53 bottles of beer.\nTake one down and pass it around, " +
                     "52 bottles of beer on the wall.\n\n" +
                     "52 bottles of beer on the wall, 52 bottles of beer.\nTake one down and pass it around, " +
                     "51 bottles of beer on the wall.\n\n" +
                     "51 bottles of beer on the wall, 51 bottles of beer.\nTake one down and pass it around, " +
                     "50 bottles of beer on the wall.\n\n" +
                     "50 bottles of beer on the wall, 50 bottles of beer.\nTake one down and pass it around, " +
                     "49 bottles of beer on the wall.\n\n" +
                     "49 bottles of beer on the wall, 49 bottles of beer.\nTake one down and pass it around, " +
                     "48 bottles of beer on the wall.\n\n" +
                     "48 bottles of beer on the wall, 48 bottles of beer.\nTake one down and pass it around, " +
                     "47 bottles of beer on the wall.\n\n" +
                     "47 bottles of beer on the wall, 47 bottles of beer.\nTake one down and pass it around, " +
                     "46 bottles of beer on the wall.\n\n" +
                     "46 bottles of beer on the wall, 46 bottles of beer.\nTake one down and pass it around, " +
                     "45 bottles of beer on the wall.\n\n" +
                     "45 bottles of beer on the wall, 45 bottles of beer.\nTake one down and pass it around, " +
                     "44 bottles of beer on the wall.\n\n" +
                     "44 bottles of beer on the wall, 44 bottles of beer.\nTake one down and pass it around, " +
                     "43 bottles of beer on the wall.\n\n" +
                     "43 bottles of beer on the wall, 43 bottles of beer.\nTake one down and pass it around, " +
                     "42 bottles of beer on the wall.\n\n" +
                     "42 bottles of beer on the wall, 42 bottles of beer.\nTake one down and pass it around, " +
                     "41 bottles of beer on the wall.\n\n" +
                     "41 bottles of beer on the wall, 41 bottles of beer.\nTake one down and pass it around, " +
                     "40 bottles of beer on the wall.\n\n" +
                     "40 bottles of beer on the wall, 40 bottles of beer.\nTake one down and pass it around, " +
                     "39 bottles of beer on the wall.\n\n" +
                     "39 bottles of beer on the wall, 39 bottles of beer.\nTake one down and pass it around, " +
                     "38 bottles of beer on the wall.\n\n" +
                     "38 bottles of beer on the wall, 38 bottles of beer.\nTake one down and pass it around, " +
                     "37 bottles of beer on the wall.\n\n" +
                     "37 bottles of beer on the wall, 37 bottles of beer.\nTake one down and pass it around, " +
                     "36 bottles of beer on the wall.\n\n" +
                     "36 bottles of beer on the wall, 36 bottles of beer.\nTake one down and pass it around, " +
                     "35 bottles of beer on the wall.\n\n" +
                     "35 bottles of beer on the wall, 35 bottles of beer.\nTake one down and pass it around, " +
                     "34 bottles of beer on the wall.\n\n" +
                     "34 bottles of beer on the wall, 34 bottles of beer.\nTake one down and pass it around, " +
                     "33 bottles of beer on the wall.\n\n" +
                     "33 bottles of beer on the wall, 33 bottles of beer.\nTake one down and pass it around, " +
                     "32 bottles of beer on the wall.\n\n" +
                     "32 bottles of beer on the wall, 32 bottles of beer.\nTake one down and pass it around, " +
                     "31 bottles of beer on the wall.\n\n" +
                     "31 bottles of beer on the wall, 31 bottles of beer.\nTake one down and pass it around, " +
                     "30 bottles of beer on the wall.\n\n" +
                     "30 bottles of beer on the wall, 30 bottles of beer.\nTake one down and pass it around, " +
                     "29 bottles of beer on the wall.\n\n" +
                     "29 bottles of beer on the wall, 29 bottles of beer.\nTake one down and pass it around, " +
                     "28 bottles of beer on the wall.\n\n" +
                     "28 bottles of beer on the wall, 28 bottles of beer.\nTake one down and pass it around, " +
                     "27 bottles of beer on the wall.\n\n" +
                     "27 bottles of beer on the wall, 27 bottles of beer.\nTake one down and pass it around, " +
                     "26 bottles of beer on the wall.\n\n" +
                     "26 bottles of beer on the wall, 26 bottles of beer.\nTake one down and pass it around, " +
                     "25 bottles of beer on the wall.\n\n" +
                     "25 bottles of beer on the wall, 25 bottles of beer.\nTake one down and pass it around, " +
                     "24 bottles of beer on the wall.\n\n" +
                     "24 bottles of beer on the wall, 24 bottles of beer.\nTake one down and pass it around, " +
                     "23 bottles of beer on the wall.\n\n" +
                     "23 bottles of beer on the wall, 23 bottles of beer.\nTake one down and pass it around, " +
                     "22 bottles of beer on the wall.\n\n" +
                     "22 bottles of beer on the wall, 22 bottles of beer.\nTake one down and pass it around, " +
                     "21 bottles of beer on the wall.\n\n" +
                     "21 bottles of beer on the wall, 21 bottles of beer.\nTake one down and pass it around, " +
                     "20 bottles of beer on the wall.\n\n" +
                     "20 bottles of beer on the wall, 20 bottles of beer.\nTake one down and pass it around, " +
                     "19 bottles of beer on the wall.\n\n" +
                     "19 bottles of beer on the wall, 19 bottles of beer.\nTake one down and pass it around, " +
                     "18 bottles of beer on the wall.\n\n" +
                     "18 bottles of beer on the wall, 18 bottles of beer.\nTake one down and pass it around, " +
                     "17 bottles of beer on the wall.\n\n" +
                     "17 bottles of beer on the wall, 17 bottles of beer.\nTake one down and pass it around, " +
                     "16 bottles of beer on the wall.\n\n" +
                     "16 bottles of beer on the wall, 16 bottles of beer.\nTake one down and pass it around, " +
                     "15 bottles of beer on the wall.\n\n" +
                     "15 bottles of beer on the wall, 15 bottles of beer.\nTake one down and pass it around, " +
                     "14 bottles of beer on the wall.\n\n" +
                     "14 bottles of beer on the wall, 14 bottles of beer.\nTake one down and pass it around, " +
                     "13 bottles of beer on the wall.\n\n" +
                     "13 bottles of beer on the wall, 13 bottles of beer.\nTake one down and pass it around, " +
                     "12 bottles of beer on the wall.\n\n" +
                     "12 bottles of beer on the wall, 12 bottles of beer.\nTake one down and pass it around, " +
                     "11 bottles of beer on the wall.\n\n" +
                     "11 bottles of beer on the wall, 11 bottles of beer.\nTake one down and pass it around, " +
                     "10 bottles of beer on the wall.\n\n" +
                     "10 bottles of beer on the wall, 10 bottles of beer.\nTake one down and pass it around, " +
                     "9 bottles of beer on the wall.\n\n" +
                     "9 bottles of beer on the wall, 9 bottles of beer.\nTake one down and pass it around, " +
                     "8 bottles of beer on the wall.\n\n" +
                     "8 bottles of beer on the wall, 8 bottles of beer.\nTake one down and pass it around, " +
                     "7 bottles of beer on the wall.\n\n" +
                     "7 bottles of beer on the wall, 7 bottles of beer.\nTake one down and pass it around, " +
                     "6 bottles of beer on the wall.\n\n" +
                     "6 bottles of beer on the wall, 6 bottles of beer.\nTake one down and pass it around, " +
                     "5 bottles of beer on the wall.\n\n" +
                     "5 bottles of beer on the wall, 5 bottles of beer.\nTake one down and pass it around, " +
                     "4 bottles of beer on the wall.\n\n" +
                     "4 bottles of beer on the wall, 4 bottles of beer.\nTake one down and pass it around, " +
                     "3 bottles of beer on the wall.\n\n" +
                     "3 bottles of beer on the wall, 3 bottles of beer.\nTake one down and pass it around, " +
                     "2 bottles of beer on the wall.\n\n" +
                     "2 bottles of beer on the wall, 2 bottles of beer.\nTake one down and pass it around, " +
                     "1 bottle of beer on the wall.\n\n" +
                     "1 bottle of beer on the wall, 1 bottle of beer.\nTake it down and pass it around, " +
                     "no more bottles of beer on the wall.\n\n" +
                     "No more bottles of beer on the wall, no more bottles of beer.\nGo to the store and buy " +
                     "some more, 99 bottles of beer on the wall.\n\n",
                beerSong.singSong());
    }

}
public class BeerSong {

    private String premise(int bottles) {
        
        switch (bottles) {
            case 0:
                return "No more bottles of beer on the wall, no more bottles of beer.";
            case 1:
                return "1 bottle of beer on the wall, 1 bottle of beer.";
            default:
                return String.format("%1$d bottles of beer on the wall, %1$d bottles of beer.", 
                                     bottles);
        }
    }

    private String conclusion(int bottles) {
        
        switch (bottles) {
            case 0:
                return "Go to the store and buy some more, 99 bottles of beer on the wall.";
            case 1:
                return "Take it down and pass it around, no more bottles of beer on the wall.";
            default:
                return String.format("Take one down and pass it around, %1$d bottle%2$s of beer on the wall.", 
                                     bottles - 1, bottles != 2 ? "s" : "");
        }
    }

    private String verse(int bottles) {
        
        return premise(bottles) + "\n" + conclusion(bottles) + "\n\n";   
    }
    
    public String sing(int bottles, int howManyDown) {
        
        StringBuilder verses = new StringBuilder();
        
        for (int i = bottles; i > bottles - howManyDown; i--) {
            verses.append(verse(i));
        }
        
        return verses.toString();
    }

    public String singSong() {
        
        return sing(99, 100);
    }
}

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