What will be the output of this code?

What will be the output of this code?

class Demo {
  Demo() {
    this(10);
    System.out.println("No-arg constructor");
  }
  Demo(int x) {
    System.out.println("Param constructor: " + x);
  }
  public static void main(String[] args) {
    new Demo();
  }
}