示例
protected void finalize() throws Throwable {
try {
Runnable runnable = getRunnable();
Thread thread = new Thread( runnable );
thread.start();
}
finally {
super .finalize();
}
}

private Runnable getRunnable() {
return _runnable;
}

private transient Runnable _runnable;
解决方案
使用显式调用的 cleanup 方法来代替 finalize() 方法。
public void free() {
Runnable runnable = getRunnable();
Thread thread = new Thread( runnable );
thread.start();
}

private Runnable getRunnable() {
return _runnable;
}

private transient Runnable _runnable;