Interface execetuion error

Question

First I have created one package ,its name is fibonacci.
In that I have created one interface ,the code of that programme is:
package fibonacci;
public interface Fibonacci {
// Method to calculate the fibonacci sequence
public int calculateFibonacci( int num );
// Method to return an array of results
public int[] calculateFibonacciRange(int start, int stop);
And I have implemented this interaface in this programme:
package fibonacci;
public class FibonacciImpl implements fibonacci.Fibonacci {
public int calculateFibonacci( int num ) {
if (num <= 0) return 0;
if (num == 1) return 1;
int previous1 = 1, previous2 = 0, fib = 0;
for (int i=2; i <= num; i++) {
// the fib is the answer of the previous two answers
fib = previous1 + previous2;
// reset the previous values
previous2 = previous1;
previous1 = fib;
return fib;
public int[] calculateFibonacciRange(int start, int stop) {
int[] results = new int[stop + 1];
for (int x=start; x <= stop; x++) {
results[x] = this.calculateFibonacci( x );
return results;
The question is:
1) The code in this programme is correct.
2)when I try to compile like this:
c:\javac fibonacci.FibonacciImpl.java
then it is giving the following error
Error is:
fibonacci\FibonacciImpl.java:3: canot find symbol
symbol :class Fibonacci
location :package fibonacci
pubic class FibonacciImpl implements fibonacci.Fibonacci
what is the solution for this,to run with out error

Answer 1

Hi All,
I have a problem .Am trying to implement an
interface inside a package .The interface class file
resides in the same package folder and another file
"one.java" inside the package is trying to implement
the inter face .But it is not recognizing the
interface class. here is the coding
package commons;
import java.io.*;
class one implements myinter
public static String returnname()
String name="toms";
System.out.println("The name is "+name);
myinter obj;
return name;
package commons;
public interface myinter
public String retname();
}even though you should have asked this in a separate thread, I'm feeling nice. so I'll tell you that you shouldn't declare your returnname method as static