Concept of illegal combination of abstract and private

//Use a abstract class
abstract class A
{

      abstract private void display()//illegal combination of abstract and private
     {
        //use printf function
         System.out.println("Hello");
      }
}


// write another class
class Eight
{
       public static void main(String args[])
      {
           //use printf function      
           System.out.println("yes/no?");
       }
}