Name: krC82822 Date: 11/02/2000


2 Nov 2000, eval1127@eng -- reproduced with 1.3.0 (Solaris).
See also # 4239645, 4278871.
-----------
java version "1.3.0"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.3.0-C)
Java HotSpot(TM) Client VM (build 1.3.0-C, mixed mode)


When a SoftReference is cleared, the clear method on the subclass is not called.

The JDK documentation explicitly states that we can derive a Reference. So I
don't see what I'm doing wrong. It should be a bug.

  To reproduce the problem, launch the following example with the command:

java -mx1m RefBug you will see:

D:\Users\Jolif\Essais>java -mx1m RefBug
Soft reference created
in soft [Ljava.lang.String;@3fbdb0
in soft [Ljava.lang.String;@3fbdb0
in soft null << the clear method has not been called !


import java.lang.ref.*;

public class RefBug
{
  private static class MySoftReference extends SoftReference
  {
    public MySoftReference(Object referent)
    {
      super(referent);
      System.out.println("Soft reference created");
    }

    public void clear()
    {
      super.clear();
      System.out.println("I just clear()'d my ref");
    }
  }
  
  // CJO 10/00
  public static void main(String arg[])
  {
    SoftReference ref = new MySoftReference(new String[10000]);
    
    System.out.println("in soft "+ref.get());
    
    String[] array = new String[10000];
    
    System.out.println("in soft "+ref.get());

    System.gc();
    try {
      Thread.sleep(10000);
    } catch (Exception e) {}
    System.gc();

    System.out.println("in soft "+ref.get());
  }
}
(Review ID: 111128)
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