package example;
public interface MathService {
/**
* Adds two integers.
*/
public int add(int a, int b);
/**
* Subtract two integers.
*/
public int sub(int a, int b);
/**
* Multiply two integers.
*/
public int mul(int a, int b);
/**
* Divide two integers.
*/
public int div(int a, int b);
}