publicclassTestCase{publicstaticvoidmain(String[]args){ServiceLoader<Search>s=ServiceLoader.load(Search.class);Iterator<Search>iterator=s.iterator();while(iterator.hasNext()){Search search=iterator.next();search.searchDoc("hello world");}}} 可以看到输出结果:文件搜索 hello world 如果在com.cainiao.ys...
方法名:asSubclass Class.asSubclass介绍 [英]Casts this Class to represent a subclass of the given class. If successful, this Class is returned; otherwise a ClassCastException is thrown.[中]强制转换该类以表示给定类的子类。如果成功,则返回该类;否则将抛出ClassCastException。 代码示例 代码示例来源:...
asSubclass() 方法可在java.lang包。 asSubclass() 方法强制转换此 Class 对象以表示由给定 Class 对象表示的类的子类。 asSubclass() 方法是一个非静态方法,它只能通过类对象访问,如果我们尝试使用类名访问方法,那么我们将得到一个错误。 asSubclass() 方法可能会在投射类时抛出 ClassCastException。ClassCastExcept...
public <U> Class<? extends U> asSubclass(Class<U> clazz)This method casts this Class to return a subclass of the class represented by the specified clazz object. If cast is not valid, it throws a ClassCastException . This method is useful when a client needs to "narrow" the type of...
[Android.Runtime.Register("asSubclass","(Ljava/lang/Class;)Ljava/lang/Class;","")] [Java.Interop.JavaTypeParameters(new System.String[] {"U"})]publicJava.Lang.ClassAsSubclass(Java.Lang.Class clazz); Parameters clazz Class the class of the type to cast thisClassobject to ...
We’ll create an example with a superclassCharacterand subclassesWarriorandCommander. Our objective will be to learn how to cast a genericCharacterobject to a specific subclass type to access its unique methods. The use case involves creating instances ofWarriorandCommander. These instances are store...
方法名:asSubclass Class.asSubclass介绍 [英]Casts this Class to represent a subclass of the given class. If successful, this Class is returned; otherwise a ClassCastException is thrown. [中]强制转换该类以表示给定类的子类。如果成功,则返回该类;否则将抛出ClassCastException。
Class<?> arrayType() Returns a Class for an array type whose component type is described by this Class. <U> Class<? extends U> asSubclass(Class<U> clazz) Casts this Class object to represent a subclass of the class represented by the specified class object. T cast(Object obj) Casts ...
Thrown to indicate that the code has attempted to cast an object to a subclass of which it is not an instance.C# Kopieren [Android.Runtime.Register("java/lang/ClassCastException", DoNotGenerateAcw=true)] public class ClassCastException : Java.Lang.RuntimeExceptionInheritance Exception Throwable...
extend:class.cast类型转换,class.asSubclass转换成超类型 枚举和注解 用枚举代替int常量/String常量 Java枚举的本质是int final 实例受控 类型安全 优点:允许添加任意的方法和域,实现任意接口,以及序列化支持. 如果枚举具有普遍适用性,那它就应该成为一个顶层类,否则是被用在一个特定的顶层类中,就应该成为顶层类的...