Java force fields inheritance

Question

I know there have been lots of thread about Java inheritance (and i already read it), but they all stand for \"how it is\", and I need knowledge \"how to change it\". So, we hav

Answer 1

You should use a constructor and possibly a getter

class t1{
 public final int a;

 public t1() {
    this(5);
 }
 protected t1(int a) {
    this.a = a;
 }

 public void get(){
    System.out.println(a);
 }
}

class t2 extends t1{
  public t2() {
     super(1);
  }
}

now

t2 z = new t2();
z.get();

prints 1