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class Base {
  Base(int num) { System.out.println("Base num = " + num); }
}
 
class Sub extends Base {
  Sub(int num) { Base(num + 77); }
}
 
class Main {
  public static void main(String[] args) {
    Base b = new Base(123);
  };
}
 

Main.java:6: error: constructor Base in class Base cannot be applied to given types;
  Sub(int num) { Base(num + 77); }
               ^
  required: int
  found: no arguments
  reason: actual and formal argument lists differ in length
Main.java:6: error: cannot find symbol
  Sub(int num) { Base(num + 77); }
                 ^
  symbol:   method Base(int)
  location: class Sub
2 errors

Standard output is empty