Can you define an abstract class without any abstract methods? if yes what is the use of it?

• Yes.
• Declaring a class abstract without abstract methods means that you don't allow it to be instantiated on its own.
• The abstract class used in java signifies that you can't create an object of the class directly.
• This will work:
  public abstract class abs {
  
  protected int s=0;
  
  public void display() {
      System.out.print("hello");
  }
  
  }