Chapter 4, ex 12, Java only

09:40 -- starting 4.12, Java version
09:43 -- Done

---
// ch04_ex12.java
class ch04_ex12 {
  int i;
  public void finalize() {
    System.out.println( "Finalizing object." );
  }
  public static void main(String[] args) {
    ch04_ex12 obj = new ch04_ex12();
    obj = null;
    System.gc();
  }
}
---

Got the message this time.

One intesting subtlety. If I said

    {
      ch04_ex12 obj = new ch04_ex12();
    }
    System.gc();

instead of actually assigning null to obj, the gc didn't finalize the object. I tried the same thing in another function, and then the gc in main() did finalize that object:

  static void alloc() { ch04_ex12 obj = new ch04_ex12(); }
  public static void main(String[] args) {
    alloc();
    {
      ch04_ex12 obj = new ch04_ex12();
    }
    System.gc();
  }

Prints "Finalizing object.", but only once. Calling System.runFinalization() doesn't help.

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