Main.java

public class Main {
    public static void main(String[] args) {
        P16_Student stu24 = new P16_Student("Fei",17,false);
        System.out.print(stu24.getName());
        System.out.print(" is ");
        System.out.println(stu24.getAge());
        System.out.println("UCAS complete: "+stu24.getUCAS());
        stu24.validAge();

        P16_Student stu25 = new P16_Student("Bram",12,false);
        stu25.validAge();

        Student stu1 = new Student ("Bram", 12);
        stu1.validAge();
    }
}

public class Student {
    private String name;
    private int age;
    public Student (String n, int a){
        name = n;
        age = a;
    }
    public void validAge(){
        if (age >=11 && age <= 16) {
            System.out.println("Age Valid");
        }else{
            System.out.println("Age Invalid");
        }
    }
    public String getName() {
        return name;
    }
    public void setName(String n) {
        name = n;
    }
    public int getAge() {
        return age;
    }
    public void setAge(int a) {
        age = a;
    }
}

// Original Student Constructor has been placed back into the Student Class.

public class P16_Student extends Student{
    private boolean UCAS;

  public P16_Student(String n,int a,boolean u){
       super (n,a);
       UCAS = u;
   }
   //@Override?
   public void validAge(){
    if (super.getAge() >=16 && super.getAge() <= 19){
         System.out.println("Age Valid");
     }else{
         System.out.println("Age Invalid");
     }
   }
   public boolean getUCAS() {
       return UCAS;
   }
   public void setUCAS(boolean u) {
       UCAS = u;
   }
}