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real language
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Language Java
(object-oriented version)
| Date: | 04/20/05 |
| Author: | Anonymous |
| URL: | n/a |
| Comments: | 11 |
| Info: | n/a |
| Score: |  (3.50 in 34 votes) |
/* the main method instantiates drinkers and directs them to
a newly-instantiated wall of beer.
*/
public class Sing99Bob {
public static void main(String[] args) {
((NeedToFindBeer)(new Drinkers())).pointAtBeer(new WallOfBeer());
}
}
interface NeedToFindBeer { void pointAtBeer(WallOfBeer wob); }
/* an instance of Drinkers, after being pointed at a wall containing
beer, will periodically take one down. The singing is driven by
the taking of the beer.
*/
class Drinkers extends Thread implements NeedToFindBeer {
static final int drinkRate = 2;
WallOfBeer ourBeer;
public void run() {
while (ourBeer.takeOne()>0) {
try { Thread.sleep(drinkRate*1000); } catch (InterruptedException ignore) {}
}
}
public void pointAtBeer(WallOfBeer wob) {
ourBeer = wob;
this.start();
}
}
interface Countable { int howMany(); }
/* an instance of a WallOfBeer will maintain a count of the
beer bottles. The wall has an associated Narrator who
reports each time the number of bottles is changed.
*/
class WallOfBeer implements Countable {
static final int full = 99;
int count = 0;
WallWatcher ww;
{
ww = new Narrator();
putSome(full);
}
void putSome(int some) {
count += some;
if (ww!=null) ww.wallEvent(this);
}
int takeOne() {
count--;
if (ww!=null) ww.wallEvent(this);
return count;
}
public int howMany() { return count; }
}
interface WallWatcher { void wallEvent(Countable wob); }
/* an instance of Narrator sings the verse each time it is
notified that something has happened to the wall. This
narrator attempts to be grammatical, and uses words for
the bottle count (singers sing words not numerals). The
singing is paced, not merely lump-dumped to sysout.
*/
class Narrator implements WallWatcher {
static final int singspeed = 500;
public void wallEvent(Countable wob) {
int b = wob.howMany();
try {
System.out.print(bob(b, true)+onwall+", ");
Thread.sleep(singspeed);
System.out.print(bob(b, false)+".\n");
Thread.sleep(singspeed);
System.out.print((b>0)?takedown:gostore);
Thread.sleep(singspeed);
System.out.print((b>0)?bob(b-1, false):bob(WallOfBeer.full, false));
System.out.print(onwall+".\n");
} catch (InterruptedException ignore) {}
}
static final String bob(int i, boolean c) {
String word = word(i);
if (c) word = (word.substring(0, 1).toUpperCase())+word.substring(1);
return word+" bottle"+((i==1)?"":"s")+" of beer";
}
static final String word(int i) {
if (i==0) return "no more";
if (i<20) return units[i];
return tens[i/10]+((units[i%10]=="")?"":"-"+units[i%10]);
}
static final String
onwall = " on the wall",
takedown = "Take one down and pass it around, ",
gostore = "Go to the store, get some more, ";
static final String[]
tens = {"", "", "twenty", "thirty", "forty",
"fifty", "sixty", "seventy", "eighty", "ninety"},
units = {"", "one", "two", "three", "four", "five", "six", "seven",
"eight", "nine", "ten", "eleven", "twelve", "thirteen", "fourteen",
"fifteen", "sixteen", "seventeen", "eighteen", "nineteen"};
}
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Alternative Versions
| Version | Author | Date | Comments | Rate |
|---|---|---|---|---|
| bytecode-version with loader | Tilo Dickopp | 05/23/06 | 9 | |
| exception oriented | Jarek Ratajski | 09/08/05 | 1 | |
| Java 5.0 object-oriented version | Kvols | 11/19/05 | 2 | |
| Singing with Java Speech API | Kevin Seifert | 05/04/06 | 1 | |
| standard version | Sean Russell | 04/20/05 | 10 | |
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Comments
Short and simple, true Java-way
That being said, yes, you can write for loops in Java as well. But this program shows off how easy it is to use threads and the power of programming to interface in Java. For example, want a different language? Or even a different song? Implement the WallWatcher interface for each version of the song you want, and this program can handle all of them, either singing separately, or even at the same time (if this were a bar with multiple singers in a video game or something).
Nice job, very well-designed and robust!
public class Bottles {
static final String p1 = "{0, choice, -1#99|0#no more|0<{0}} bottle{0, choice, 0#s|1#|1<s} of beer";
static final String p2 = " on the wall";
static final String p3 = "{0, choice, -1#Go to the store and buy some more|0#Take one down and pass it around}, ";
static final String patterns[] = { p1 + p2 + ", " + p1 + ".", p3 + p1 + p2 + "." } ;
public static void main(String[] args ) {
for (int i = 99; i >= 0; i-- ) {
System.out.println(java.text.MessageFormat.format(patterns[0], i ).replaceFirst("^n", "N" ) ) ;
System.out.println(java.text.MessageFormat.format(patterns[1], i - 1 ) );
}
}
}
If can be written in five lines.
It is interesting though how people can find the most complicated solutions to the simplest of problems.
Cheers
public static void main(String[] args) {
beer();
}
public static void beer() {
for (int i=99; i>=3; i--){
System.out.println(i+" bottles of beer on the wall, " +i+ " bottles of beer."
System.out.println("Take one down and pass it around, "+(i-1)+ " bottles of beer on the wall."
System.out.println();
}
System.out.println("2 bottles of beer on the wall, 2 bottles of beer."
System.out.println("Take one down and pass it around, 1 bottle of beer on the wall."
System.out.println();
System.out.println("1 bottle of beer on the wall, 1 bottle of beer."
System.out.println("Take one down and pass it around, no more bottles of beer on the wall."
System.out.println();
System.out.println("No more bottles of beer on the wall, no more bottles of beer. "
System.out.println("Go to the store and buy some more, 99 bottles of beer on the wall."
}
}
how about this?