48         Image t = check();
  49         if (t == null) {
  50             t = reconstitute();
  51             setThing(t);
  52         }
  53         return t;
  54     }
  55 
  56     /**
  57      * Create the Ref
  58      */
  59     AppletImageRef(URL url) {
  60         this.url = url;
  61     }
  62 
  63     /**
  64      * Flushes the cached object.  Forces the next invocation of get() to
  65      * invoke reconstitute().
  66      */
  67     public synchronized void flush() {
  68         SoftReference s = soft;
  69         if (s != null) s.clear();
  70         soft = null;
  71     }
  72 
  73     /**
  74      * Sets the thing to the specified object.
  75      * @param thing the specified object
  76      */
  77     public synchronized void setThing(Object thing) {
  78         flush();
  79         soft = new SoftReference(thing);
  80     }
  81 
  82     /**
  83      * Checks to see what object is being pointed at by this Ref and returns it.
  84      */
  85     public synchronized Image check() {
  86         SoftReference<Image> s = soft;
  87         if (s == null) return null;
  88         return s.get();
  89     }
  90 
  91     /**
  92      * Reconsitute the image.  Only called when the ref has been flushed.
  93      */
  94     public Image reconstitute() {
  95         Image img = Toolkit.getDefaultToolkit().createImage(new URLImageSource(url));
  96         return img;
  97     }
  98 }

  48         Image t = check();
  49         if (t == null) {
  50             t = reconstitute();
  51             setThing(t);
  52         }
  53         return t;
  54     }
  55 
  56     /**
  57      * Create the Ref
  58      */
  59     AppletImageRef(URL url) {
  60         this.url = url;
  61     }
  62 
  63     /**
  64      * Flushes the cached object.  Forces the next invocation of get() to
  65      * invoke reconstitute().
  66      */
  67     public synchronized void flush() {
  68         SoftReference<Image> s = soft;
  69         if (s != null) s.clear();
  70         soft = null;
  71     }
  72 
  73     /**
  74      * Sets the thing to the specified object.
  75      * @param thing the specified object
  76      */
  77     public synchronized void setThing(Image thing) {
  78         flush();
  79         soft = new SoftReference<>(thing);
  80     }
  81 
  82     /**
  83      * Checks to see what object is being pointed at by this Ref and returns it.
  84      */
  85     public synchronized Image check() {
  86         SoftReference<Image> s = soft;
  87         if (s == null) return null;
  88         return s.get();
  89     }
  90 
  91     /**
  92      * Reconsitute the image.  Only called when the ref has been flushed.
  93      */
  94     public Image reconstitute() {
  95         Image img = Toolkit.getDefaultToolkit().createImage(new URLImageSource(url));
  96         return img;
  97     }
  98 }