Initial data commit

Task/Farey-sequence/Java/farey-sequence.java

@@ -0,0 +1,43 @@
+import java.util.TreeSet;
+
+public class Farey{
+	private static class Frac implements Comparable<Frac>{
+		int num;
+		int den;
+		
+		public Frac(int num, int den){
+			this.num = num;
+			this.den = den;
+		}
+
+		@Override
+		public String toString(){
+			return num + "/" + den;
+		}
+
+		@Override
+		public int compareTo(Frac o){
+			return Double.compare((double)num / den, (double)o.num / o.den);
+		}
+	}
+	
+	public static TreeSet<Frac> genFarey(int i){
+		TreeSet<Frac> farey = new TreeSet<Frac>();
+		for(int den = 1; den <= i; den++){
+			for(int num = 0; num <= den; num++){
+				farey.add(new Frac(num, den));
+			}
+		}
+		return farey;
+	}
+	
+	public static void main(String[] args){
+		for(int i = 1; i <= 11; i++){
+			System.out.println("F" + i + ": " + genFarey(i));
+		}
+		
+		for(int i = 100; i <= 1000; i += 100){
+			System.out.println("F" + i + ": " + genFarey(i).size() + " members");
+		}
+	}
+}