e106. holding onto an object until memory becomes low.txt

这里面包含了一百多个JAVA源文件

A soft reference holds onto its referent until memory becomes low. 
    // Create up the soft reference.
    SoftReference sr = new SoftReference(object);
    
    // Use the soft reference.
    Object o = sr.get();
    if (o != null) {
        process(o);
    } else {
        // The object is being collected or has been reclaimed.
    }