How to define boolean in the fields ?

[racewithferrari]

public class Ship
{
  /////////////////// fields ////////////
  public String cruiser;
  public int size;
  public int numHits;
  boolean sunk;
  
  
  //////////// constructors /////////////
}

And how to write String and int in the constructor and method as per the given instructions.

[CodesAway]

You already have a boolean "sunk" defined. Can you clarify what you need help with?

Also, why did you declare your member fields public, in most cases, they should be private, or in some cases protected, but never public.

[racewithferrari]

Thanks for clarifying the boolean, I was confused. Now I have no idea what to write in constructors

[Fubarable]

Thanks for clarifying the boolean, I was confused. Now I have no idea what to write in constructors

Perhaps this will give you an idea: Java Constructor Tutorial.

Much luck!