Currently, something like this is needed:

cc.constructor(con -> {
   con.public_();
   con.body(bc -> {
      bc.invokeSpecial(ConstructorDesc.of(Object.class), con.this_()); // replace ConstructorDesc.of(Object.class) with superclass
      bc.return_();
    });
});

Public no-args constructor is a very common thing to do (even javac adds the default no-args constructor automatically).

I don't think we should do that automatically but we should make it easier.