30 lines
829 B
Java
30 lines
829 B
Java
// reuse/BlankFinal.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.
|
|
// "Blank" final fields
|
|
|
|
class Poppet {
|
|
private int i;
|
|
Poppet(int ii) { i = ii; }
|
|
}
|
|
|
|
public class BlankFinal {
|
|
private final int i = 0; // Initialized final
|
|
private final int j; // Blank final
|
|
private final Poppet p; // Blank final reference
|
|
// Blank finals MUST be initialized in constructor:
|
|
public BlankFinal() {
|
|
j = 1; // Initialize blank final
|
|
p = new Poppet(1); // Init blank final reference
|
|
}
|
|
public BlankFinal(int x) {
|
|
j = x; // Initialize blank final
|
|
p = new Poppet(x); // Init blank final reference
|
|
}
|
|
public static void main(String[] args) {
|
|
new BlankFinal();
|
|
new BlankFinal(47);
|
|
}
|
|
}
|