21 lines
506 B
Java
21 lines
506 B
Java
// 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]
|
|
*/
|