示例
protected void finalize() throws Throwable {
try {
Provider provider = Security.getProvider(PROVIDER_NAME);
provider.clear();
}
finally {
super .finalize();
}
}

private static final String PROVIDER_NAME = "provider";
解决方案
使用显式调用的 cleanup 方法来代替 finalize() 方法。
public void free() {
Provider provider = Security.getProvider(PROVIDER_NAME);
provider.clear();
}

private static final String PROVIDER_NAME = "provider";