// collections/PlusTen.java

// (c)2021 MindView LLC: see Copyright.txt

// We make no guarantees that this code is fit for any purpose.

// Visit http://OnJava8.com for more book information.

// {NewFeature} Since JDK 16

record PlusTen(int x) {

PlusTen {

x += 10;

}

// Adjustment to field can only happen in

// the constructor. Still not legal:

// void mutate() { x += 10; }

public static void main(String[] args) {

System.out.println(new PlusTen(10));

}

}

/* Output:

PlusTen[x=20]

*/