Object finalizee=this.get();if(finalizee !=null&& !(finalizeeinstanceofjava.lang.Enum)) {//通过JDK调用对象的finalize方法jla.invokeFinalize(finalizee);/*Clear stack slot containing this variable, to decrease the chances of false retention with a conservative GC*/finalizee=null; } }catch(Throw...
If the variable has no value for the * current thread, it is first initialized to the value returned * by an invocation of the {@link #initialValue} method. * * @return the current thread's value of this thread-local */ public T get() { Thread t = Thread.currentThread(); Thread...
invokeFinalizeMethod(finalizee); /* Clear stack slot containing this variable, to decrease the chances of false retention with a conservative GC */ finalizee = null; } } catch (Throwable x) { } super.clear(); } 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16....
直到JDK11为止,只存在四种引用,这些引用是由JVM创建,因此直接继承java.lang.ref.Reference创建自定义的引用类型是无效的,但是可以直接继承已经存在的引用类型,如java.lang.ref.Cleaner就是继承自java.lang.ref.PhantomReference。 特殊的java.lang.ref.Reference的子类java.lang.ref.FinalReference和Object#finalize()有关,...
bool b = ReferenceEquals(v, v); //v is a variable of some value type 也会返回false,因为在转换每个参数时,v都会被单独装箱,这意味着会得到不同的引用。调用ReferenceEquals()来比较值类型实际上没有什么意义。 尽管System.ValueType提供的Equals()默认重载肯定足以应付绝大多数自定义的结构,但仍可以为自己...
* This method recomputes the reference list by scanning the subtree rooted at this variable binding. * If the scan proves expensive, or if more than two references are found, or if a looping reference is found, * then the scan is abandoned. On completion the reference list for the variab...
class)) .withSetterParameterDefinition("identifier", fromSimpleParameter("variableName").build()) .build()); componentBuildingDefinitions.add(baseDefinition .withIdentifier("global-property") .withTypeDefinition(fromType(String.class)) .withConstructorParameterDefinition(fromSimpleParameter("value").build(...
privatevoidrunFinalizer(JavaLangAccessjla){synchronized(this){if(hasBeenFinalized())return;remove();}try{Objectfinalizee=this.get();if(finalizee!=null&&!(finalizeeinstanceofjava.lang.Enum)){jla.invokeFinalize(finalizee);/* Clear stack slot containing this variable, to decrease ...
EnvironmentVariableCredentialsProvidercredentialsProvider=CredentialsProviderFactory.newEnvironmentVariableCredentialsProvider();// 填写Bucket名称,例如examplebucket。StringbucketName="examplebucket";// 填写Bucket所在地域。以华东1(杭州)为例,Region填写为cn-hangzhou。Stringregion="cn-hangzhou";// 创建OSSClient实例。
运行本代码示例之前,请先配置环境变量 EnvironmentVariableCredentialsProvider credentialsProvider = CredentialsProviderFactory.newEnvironmentVariableCredentialsProvider(); // 创建 OSSClient 实例 ClientBuilderConfiguration clientBuilderConfiguration = new ClientBuilderConfiguration(); // 显式声明使用 V4 签名算法 client...