Default values of static fields

Ioi Lam ioi.lam at oracle.com
Wed Jan 9 01:13:34 UTC 2019


http://cr.openjdk.java.net/~fparain/L-world/LW2-JVMS-draft-20181009.pdf 
says:

    5.4.2. Preparation

    Preparation involves creating the static fields for a class or
    interface and initializing such
    fields to their default values.

However, in the current implementation, for a class like this:

class Test {
     static Point p;
}

The slot for p as stored in the mirror object of the Test class is NULL. 
When the JVM reads Test.p, it must do a NULL check, and return 
Point.default as appropriate.

Is there any reason for doing this? Why don't we initialize Test.p to 
point to Point.default when we allocate the mirror for Test?

Thanks

- Ioi





More information about the valhalla-dev mailing list