Problem with constructor

Question

Hi guys
when i created this constructor, it keep throwing back this error whcih i don't understand.
public interface MyNumber {
// data defination
     private int wholenumber = 0;
     private float fraction = 0;
// constructor
public MyNumber(int whole, float fract) {
     wholenumber = whole;
     fraction = fract;
may i know what is wrong with my constructor code?
it keep saying <identifier>> expected

Answer 1

part b of the question has ask for an interface class
any problem with my code?
public class MyNumber {
// data defination
     private int wholenumber = 0;
     private float fraction = 0;
// constructor
public MyNumber(int whole, float fract) {
     wholenumber = whole;
     fraction = fract;
// methods or operations
     public MyNumber add(MyNumber c, MyNumber d){
          int r = wholenumber + c.getWholeNumber();
          float i = fraction + c.getFraction();
          MyNumber newC = new MyNumber(r,i);
          //MyNumber newD = new MyNumber(i);
          return newC;
          //return newD;
     public MyNumber subtract(MyNumber c, MyNumber d){
          int r = wholenumber - c.getWholeNumber();
          float i = fraction - c.getFraction();
          MyNumber newC = new MyNumber(r,i);
          //MyNumber newD = new MyNumber(i);
          return newC;
          //return newD;
     public MyNumber multiply(MyNumber c, MyNumber d){
          int r = wholenumber * c.getWholeNumber();
          float i = fraction * c.getFraction();
          MyNumber newC = new MyNumber(r,i);
          //MyNumber newD = new MyNumber(i);
          return newC;
          //return newD;
     public int getWholeNumber(){
          return wholenumber;
     public float getFraction(){
          return fraction;
}