Java Reference
In-Depth Information
{
private byte[] image;
private Image(String name)
{
image = new byte[1024*1024*100];
}
static Image getImage(String name)
{
return new Image(name);
}
}
class ImageCache
{
public static void main(String[] args)
{
Image image = Image.getImage("large.png");
System.out.println("caching image");
SoftReference<Image>
cache
=
new
SoftReferen-
ce<>(image);
image = null;
byte[] b = new byte[1024];
while (cache.get() != null)
{
System.out.println("image is still cached");
b = new byte[b.length*10];
}
System.out.println("image is no longer cached");
b = null;
System.out.println("reloading and recaching image");
cache
=
new
SoftReferen-
ce<>(Image.getImage("large.png"));
int counter = 0;
while (cache.get() != null && ++counter != 7)
System.out.println("image is still cached");
}
}
