class Osiol{
    private double masa;
    Balon[] balony;

    void dodajBalon(Balon balon){
        if(this.balony == null) {
            this.balony = new Balon[1];
            this.balony[0] = balon;
        }else{
            Balon[] tmp = new Balon[this.balony.length+1];
            for(int i = 0; i<this.balony.length; i++)
                tmp[i] = this.balony[i];
            this.balony = tmp;
            this.balony[this.balony.length - 1] = balon;
        }
    }
}