How to call one constructor from another in Java

Question

Is it possible to call one constructor from another constructor?

Answer 1

You can only chain to one constructor, and it has to be the first statement in your constructor body.

public class Constr {
    private int x;

    public Constr() {
        this(1);
    }

    public Constr(int x) {
        this.x = x;
    }
}

Answer 2

public class Cons {
 public static Cons newCons(int arg1,...) {
  // This function is commonly called valueOf, like Integer.valueOf(..)
  // More recently called "of", like EnumSet.of(..)
  Cons c = new Cons(...);
  c.setArg1(....);
  return c;
 }
} 

To call a super class, use super(asdf).