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  1. class TwelveDaysOfChristmas {
  2.  
  3.     public static final String[] lines = new String[] {
  4.         "A partridge in a pear tree",
  5.         "Two turtle doves and",
  6.         "Three French Hens,",
  7.         "Four calling birds",
  8.         "Five golden rings.",
  9.         "Six geese a-laying,",
  10.         "Seven swans a-swimming,",
  11.         "Eight maids a-milking,",
  12.         "Nine ladies dancing,",
  13.         "Ten lords a-leaping,",
  14.         "Eleven Pipers piping,",
  15.         "Twelve drummers drumming,"
  16.     };
  17.  
  18.     public static final String[] days = new String[] {
  19.         "first",
  20.         "second",
  21.         "third",
  22.         "fourth",
  23.         "fifth",
  24.         "sixth",
  25.         "seventh",
  26.         "eighth",
  27.         "ninth",
  28.         "tenth",
  29.         "eleventh",
  30.         "twelfth"
  31.     };
  32.  
  33.     public static void main(String[] args) {
  34.     	try {
  35.     		recurseDown(0);
  36.     	} catch (RuntimeException e) {
  37.     		// nothing.
  38.     	}
  39.     }
  40.  
  41. 	private static void recurseDown(int i) {
  42. 		System.out.println("\nOn the " + days[i] + " day of Christmas\nMy true love sent to me");
  43. 		try {
  44. 			recurseUp(i);
  45. 		} catch (RuntimeException e) {
  46. 			// nothing.
  47. 		}
  48. 		recurseDown(i + 1);
  49. 	}
  50.  
  51. 	private static void recurseUp(int i) {
  52. 		System.out.println(lines[i]);
  53. 		recurseUp(i - 1);
  54. 	}
  55. }
Success #stdin #stdout 0.1s 320704KB
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On the first day of Christmas
My true love sent to me
A partridge in a pear tree

On the second day of Christmas
My true love sent to me
Two turtle doves and
A partridge in a pear tree

On the third day of Christmas
My true love sent to me
Three French Hens,
Two turtle doves and
A partridge in a pear tree

On the fourth day of Christmas
My true love sent to me
Four calling birds
Three French Hens,
Two turtle doves and
A partridge in a pear tree

On the fifth day of Christmas
My true love sent to me
Five golden rings.
Four calling birds
Three French Hens,
Two turtle doves and
A partridge in a pear tree

On the sixth day of Christmas
My true love sent to me
Six geese a-laying,
Five golden rings.
Four calling birds
Three French Hens,
Two turtle doves and
A partridge in a pear tree

On the seventh day of Christmas
My true love sent to me
Seven swans a-swimming,
Six geese a-laying,
Five golden rings.
Four calling birds
Three French Hens,
Two turtle doves and
A partridge in a pear tree

On the eighth day of Christmas
My true love sent to me
Eight maids a-milking,
Seven swans a-swimming,
Six geese a-laying,
Five golden rings.
Four calling birds
Three French Hens,
Two turtle doves and
A partridge in a pear tree

On the ninth day of Christmas
My true love sent to me
Nine ladies dancing,
Eight maids a-milking,
Seven swans a-swimming,
Six geese a-laying,
Five golden rings.
Four calling birds
Three French Hens,
Two turtle doves and
A partridge in a pear tree

On the tenth day of Christmas
My true love sent to me
Ten lords a-leaping,
Nine ladies dancing,
Eight maids a-milking,
Seven swans a-swimming,
Six geese a-laying,
Five golden rings.
Four calling birds
Three French Hens,
Two turtle doves and
A partridge in a pear tree

On the eleventh day of Christmas
My true love sent to me
Eleven Pipers piping,
Ten lords a-leaping,
Nine ladies dancing,
Eight maids a-milking,
Seven swans a-swimming,
Six geese a-laying,
Five golden rings.
Four calling birds
Three French Hens,
Two turtle doves and
A partridge in a pear tree

On the twelfth day of Christmas
My true love sent to me
Twelve drummers drumming,
Eleven Pipers piping,
Ten lords a-leaping,
Nine ladies dancing,
Eight maids a-milking,
Seven swans a-swimming,
Six geese a-laying,
Five golden rings.
Four calling birds
Three French Hens,
Two turtle doves and
A partridge in a pear tree
https://ideone.com/SAte6Z
language:
Java (HotSpot 12)
created:
8 years ago
visibility:
public

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