importjava.lang.reflect.ParameterizedType;importjava.lang.reflect.Type;publicclassGenericClassExample<T>{publicstaticvoidmain(String[]args){GenericClassExample<String>example=newGenericClassExample<>();example.printGenericType();}publicvoidprintGenericType(){Class<?>clazz=this.getClass();ParameterizedTypepar...
Generic Types(泛型) 泛型类型是参数化类型的通用类或接口。下面的Box类将被修改以演示这个概念。 一个简单的Box类 首先,看一下操作任何类型对象的非泛型Box类。它只需要提供两个方法:set,用于向盒子中添加对象;get,用于获取对象: public class Box { private Object object; public void set(Object object) { ...
// 引起编译错误 public class GenericException<T> extends Exception {}
Annotation annotation = class1.getAnnotation(Deprecated.class);//获取class对象指定注解 Type genericSuperclass = class1.getGenericSuperclass();//获取class对象的直接超类的 Type Type[] interfaceTypes = class1.getGenericInterfaces();//获取class对象的所有接口的type集合 4.)class对象动态生成 //第一种方式 ...
generic.Symbol; import com.huobi.service.huobi.HuobiGenericService; public interface GenericClient { @@ -16,4 +20,11 @@ public interface GenericClient { Long getTimestamp(); static GenericClient create(Options options) { if (options.getExchange().equals(ExchangeEnum.HUOBI)) { return new Huobi...
It is also possible to get the Class object for a named type (or for void) using a class literal. See Section 15.8.2 of The Java™ Language Specification. For example: <blockquote> System.out.println("The name of class Foo is: "+Foo.class.getName());</blockquote> Some method...
Static members of a class cannot refer to the type parameter of a generic class, and when accessing a static member the class name should not be parameterized. For example, here is a class, Cell<T>, in which each cell has an integer identifier and a value of type T: class Cell<T> ...
To create a generic interface, follow the same conventions as for creating a generic class. Parameterized Types You can also substitute a type parameter (that is, K or V) with a parameterized type (that is, List<String>). For example, using the OrderedPair<K, V> example: OrderedPair<Str...
However, if you've had experience with a parameterized type mechanism, in C++, for example, you will find that you can't do everything that you might expect when using Java generics. While using someone else's generic type is fairly easy, when creating your own you will encounter a numbe...
A generic class cannot extend the Throwable class directly or indirectly. For example, the following classes will not compile:// Extends Throwable indirectly class MathException<T> extends Exception { /* ... */ } // compile-time error // Extends Throwable directly class QueueFullException<T> ...