changing `.toString()` in subclasses without overwriting everything

// in class Person (personID, name, age)
@Override
        public String toString(){
                return String.format("Person: %04d: [name:%s, age:%d]", this.personID, this.name, this.age) ;
        }

// in class Student (super(personID, name, age), degree)
@Override
        public String toString() {
                // current state, since i dont know how to do it different
                return "Student{} " + super.toString();
        }

  public static void main(String[] args) {

                Person freddi = new Person("Freddi", 30);
                Person richard = new Person("Richard", 30);
                Person andre = new Student("André", 21);

                System.out.println(freddi.toString());
                System.out.println(richard.toString());
                System.out.println(andre.toString());
        }

Person: 0001: [name:Freddi, age:30]
Person: 0002: [name:Richard, age:30]
Student{} Person: 0003: [name:André, age:21]
Person: 0004: [name:Freddi, age:30]
Person: 0005: [name:Richard, age:30]
Student{} Person: 0006: [name:André, age:21]

// I know it makes no sense having one ID for Person & Student.
// its just for practise
Person: 0001: [name:Freddi, age:30]
Person: 0002: [name:Richard, age:30]
Student: 0003: [name:André, age:21]
Person: 0004: [name:Freddi, age:30]
Person: 0005: [name:Richard, age:30]
Student: 0006: [name:André, age:21]