public class IntegerPrinter {
    public String printIntegerAsBinary(int value){
        StringBuilder binary = new StringBuilder();

        while(value >= 1) {
            if (value / 2 >= 1) binary.append(value % 2);
            value /= 2;
        }

        return binary.append("1").reverse().toString();
    }

    public String printIntegerAsOctal(int value){
        StringBuilder baseEight = new StringBuilder();
        while((value/8) >= 1){//
            baseEight.append(value % 8);
            value /= 8;
        }
        return baseEight.append(value).reverse().toString();
    }

    public String printIntegerAsHexadecimal(int value){
        StringBuilder baseSixteen = new StringBuilder();
        while((value/16) != 0){
            if ((value / 16) >= 1) {
                if((value%16) >= 10){
                    baseSixteen.append((char) (87+(value%16)));
                }
                else{
                    baseSixteen.append(value % 16);
                }
                value /= 16;
            }
        }
        value = value >= 10 ? (char) 87+(value%16) : value;
        return baseSixteen.append(value).reverse().toString();
    }

    public static void main(String[] args){

    }
}