data structures - Using a SymbolTable in Java to Play Short Song -

i'm using java play short song , have create symbol tables out of input text file, have feeling i'm doing wrong assigning keys , values, i'm not sure i'm doing wrong. when run program make sound audio file going start , stops why think key value pairs incorrect. appreciated, here code:

package program2;  import algs31.binarysearchst; import stdlib.stdaudio; import stdlib.stdin;  public class playsimplesong{ public static void main(string[] args) {      stdin.fromfile("data/notes_frequencies.txt");      binarysearchst<string, double> nf = new binarysearchst<>();         string key = stdin.readline();         string[] lines = key.split("\\s");         string notes = lines[0];         double frequency = double.parsedouble(lines[1]);         nf.put(notes, frequency);   stdin.fromfile("data/sample_simple_song.txt");                binarysearchst<string, double> ss = new binarysearchst<>();         string song = stdin.readline();         string[] lines2 = song.split("\\s");         string note = lines2[0];         double duration = double.parsedouble(lines2[1]);         ss.put(note, duration);  playtone(frequency, duration);  }  public static void playtone(double frequency, double duration) {     final int slicecount = (int) (stdaudio.sample_rate * duration);     final double[] slices = new double[slicecount+1];     (int = 0; <= slicecount; i++) {         slices[i] = math.sin(2 * math.pi * * frequency / stdaudio.sample_rate);     }     stdaudio.play(slices); }       }