Duvida com Strings [RESOLVIDO]

public static void main(String[] args) throws FileNotFoundException, IOException {
       RandomAccessFile fd;
        String         line,lins[],f1,f2,f3,f4;
        int            i,recs;
        int            ids1[];
        String         ids2[],ids3[];
        Double         ids4[];
        int            index;
        String         data;

        TreeSearch     s = new TreeSearch();
        TreeAVL        a = new TreeAVL();

        fd = new RandomAccessFile("C:\Documents and Settings\Raquel\Meus documentos\Dados\Java\Projects\Tree\prods.txt","r");
        recs = 0;
        while ((line = fd.readLine()) != null)
            recs++;
        fd.seek(0);

        ids1 = new int[recs];
        ids2 = new String[recs];
        ids3 = new String[recs];
        ids4 = new Double[recs];

        i = 0;
        while ((line = fd.readLine()) != null){
            lins = line.split("\t");
            f1 = lins[0];
            f2 = lins[1];
            f3 = lins[2];
            f4 = lins[3];

            ids1[i] = Integer.parseInt(f1);
            ids2[i] = f2;
            ids3[i] = f3;
            ids4[i] = Double.parseDouble(f4);



            a.add(ids1[i]);
            s.add(ids1[i]);
            a.add(ids4[i]);  // isso aq da erro...

        }
        Random rnd = new Random();  
        index = rnd.nextInt(ids1.length - 1); // sorteia um valor qualquer da arvore
        data = String.valueOf(index);




        a.show();
        s.show();


        System.out.println("h = " + a.height());
        
    }

}