Expected Class-name before { token

class Pawn;
class Knight;
class Bishop;
class Queen;
class King;

#ifndef SQUARE_H
#define SQUARE_H

#include "shareparent.h"

class square: public shapeparent

//...

class Matrica : public apsMatrica<tip> //or any other type

Class A{
    String a;
    String b;
}
Class B extends A{
   public  B(){
      a = "some name";
      b = " second name";
   }
  public initByMethod(){
     a= " good";
     b= "bad";
   }
}

//Inside the main method
B object =new B();
System.out.println(object.a);//"some name"

Inside the main method
object.initByMethod();
System.out.println(object.a);// " good"