Sleeping Beauty problem: Difference between revisions
→{{header|Java}}
Line 524:
<syntaxhighlight>
import java.util.concurrent.ThreadLocalRandom;
public final class SleepingBeauty {
public static void main(String[] aArgs) {
final int experiments = 1_000_000;
ThreadLocalRandom random = ThreadLocalRandom.current();
enum Coin { HEADS, TAILS }
int heads = 0;
int awakenings = 0;
for ( int i = 0; i < experiments; i++ ) {
Coin coin = Coin.values()[random.nextInt(0, 2)];
switch ( coin ) {
case HEADS -> { awakenings +=1; heads += 1; }
case TAILS -> awakenings += 2;
}
}
System.out.println("Awakenings over " + experiments + " experiments: " + awakenings);
String credence = String.format("%.3f", (double) heads / awakenings);
System.out.println("Sleeping Beauty should estimate a credence of: " + credence);
}
}
</syntaxhighlight>
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<pre>
Awakenings over 1000000 experiments: 1499522
Sleeping Beauty should estimate a credence of: 0.334
</pre>
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