Package Usage

package s;

import s.a.*;

public class Test extends CPubInAPkg {
   public static void main(String[] args) {
      CPubInAPkg capub = new CPubInAPkg();
      System.out.println(capub);
      
      //Not compilabe since
      //CInAPkg ca = new CInAPkg();
      //System.out.println(ca);
      
      Test t = new Test();
      System.out.println(t);
      
   }
}

package s.a;

// public class can be accessed from outside package a 
// No constructor defined, the default constructor should has same 
// accessibility as the class, i.e. public

public class CPubInAPkg {
   int x = 12;
   int y = 24;
   public String toString() {
      return "(" + x + ", " + y + ")";
   }
}

// Default or friendly access class cannot be accessed from outside package a
// No constructor defined, the default constructor should has same 
// accessibility as the class, i.e. default or friendly

class CInAPkg {
   int x = 12;
   int y = 24;
   public String toString() {
      return "(" + x + ", " + y + ")";
   }
}