*/publicstaticType[] getGeneric(Class<?> instance, Class<?> targetClass) { Type[] superclass = instance.getGenericInterfaces();for(Type type : superclass) {if(typeinstanceofParameterizedType) {ParameterizedTypeparameterized=(ParameterizedType) type;if(parameterized.getRawType().equals(targetClass)) {...
getGenericSuperclass public Type getGenericSuperclass() Returns the Type representing the direct superclass of the entity (class, interface, primitive type or void) represented by this Class. If the superclass is a parameterized type, the Type object returned must accurately reflect the actual ...
+ "final, type " + parameter.getType().getCanonicalName() + ", and parameterized type of " + parameter.getParameterizedType() + " and " + (parameter.isVarArgs() ? "IS " : "is NOT ") + "variable." ); } } } catch (ClassNotFoundException cnfEx) { out.println("Unable to find ...
1privatestaticClass getClass(Type type,inti) {2if(typeinstanceofParameterizedType) {//处理泛型类型3returngetGenericClass((ParameterizedType) type, i);4}elseif(typeinstanceofTypeVariable) {5return(Class) getClass(((TypeVariable) type).getBounds()[0], 0);//处理泛型擦拭对象6}else{//class本身也...
从Java5以后,Java引入了“参数类型化(parameterized type)”的概念,允许在创建集合时指定集合元素的类型。泛型很大程度上是为了解决集合中存放元素类型的控制,从而可以保证程序如果在编译时没有发出警告,运行时就不会发生ClassCastException异常,并且从Java7之后有了泛型的“菱形”语法,更好的简化了泛型的编程。
public static <T> Class<T> typeOf(T obj) { return (Class<T>)obj.getClass(); } 是的。以上的代码,可以在一定范围内工作的很好。但是,当遇到泛型的时候,就事与愿违了。可以说,Java从1.5引入泛型后,对于反射中泛型的处理,就一直是一个比较麻烦的事情。
Class<T>用来描述类的Class对象。 ParameterizedType用来描述参数化类型。 我们再来试一试: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 ArrayList<String>strings=newArrayList<>();Type genericSuperclass=strings.getClass().getGenericSuperclass();System.out.println(genericSuperclassinstanceofParameterizedType)...
publicStringtoString(){StringBuilder sb=newStringBuilder();if(ownerType!=null){if(ownerTypeinstanceofClass)sb.append(((Class)ownerType).getName());elsesb.append(ownerType.toString());sb.append(".");if(ownerTypeinstanceofParameterizedTypeImpl){// Find simple name of nested type by removing the...
MalformedParameterizedTypeException - if any of the actual type parameters refer to a parameterized type that cannot be instantiated for any reason Since: 1.5 getRawType Type getRawType() Returns the Type object representing the class or interface that declared this type. Returns: the Type object...
百度试题 结果1 题目Java中引入了“参数化类型(parameterized type)”这个概念,即[]。相关知识点: 试题来源: 解析反馈 收藏