I am trying to create a method which takes two string parameters and invokes a method call on an object. The two parameters would supply the className and methodName. Ideally I wanted to use reflection to find the object and method to then invoke the method. This is for an automation suite I manage. public void executeMethod(String className, String methodName){ Class object = className.ge
我试图创建一个方法，它接受两个字符串参数并调用对象的方法调用。 这两个参数将提供className和methodName。 理想情况下，我想使用反射来查找调用该方法的对象和方法。 这是我管理的自动化套件。 public void executeMethod(String className, String methodName){ Class object = className.getClass(); Method objMethod = object.getMethod(methodName); objMethod.invoke(pageObject); } 当我运行它时，
I have methods in a class public class ReflectionClass { public int add(int a, int b) { return a + b; } public int add(int a, int b, int c) { return a + b + c; } public String concatenate (String a, String b, String c){ return a + b + c; } } I'm trying to call these methods through reflection. All I have in hand are - the method name and the
我在课堂上有方法 public class ReflectionClass { public int add(int a, int b) { return a + b; } public int add(int a, int b, int c) { return a + b + c; } public String concatenate (String a, String b, String c){ return a + b + c; } } 我试图通过反思来调用这些方法。 我手上的全部是 - 方法名称和参数。 有没有一种方法可以根据参数的数量/类型动态地将参
I was reading this about generics and their restrictions. Cannot Create Instances of Type Parameters You cannot create an instance of a type parameter. For example, the following code causes a compile-time error: public static <E> void append(List<E> list) { E elem = new E(); // compile-time error list.add(elem); } As a workaround, you can create an object of a type pa
我正在阅读关于泛型及其限制的内容。 无法创建类型参数的实例 您不能创建类型参数的实例。 例如，下面的代码会导致编译时错误： public static <E> void append(List<E> list) { E elem = new E(); // compile-time error list.add(elem); } 作为一种解决方法，您可以通过反射来创建类型参数的对象： public static <E> void append(List<E> list, Class<E> cls) throws Exceptio
I have this test code example: public class Test { private static class Test3 { private void print1() { System.out.println("1"); } } private static class Test4 extends Test3 { private void print1() { System.out.println("2"); } } public static void main(String[] args) { System.out.println("Overriden call to p
我有这个测试代码示例： public class Test { private static class Test3 { private void print1() { System.out.println("1"); } } private static class Test4 extends Test3 { private void print1() { System.out.println("2"); } } public static void main(String[] args) { System.out.println("Overriden call to private m
I have a specific target type (decided at runtime), and an iterable class that I'm comparing to it. I'm trying to write a method that checks the generic parameters of the class, to see if it's an iterable of something that subclasses my target type. Examples: Class<?> X = SomeObject.class; matches(X, new ArrayList<SomeObject>()) -> true matches(X, new ArrayList<S
我有一个特定的目标类型（在运行时决定）和一个我正在比较的迭代类。 我正在尝试编写一个方法来检查类的泛型参数，以查看它是否可以迭代我的目标类型的子类。 例子： Class<?> X = SomeObject.class; matches(X, new ArrayList<SomeObject>()) -> true matches(X, new ArrayList<SubclassOfSomeObject>()) -> true matches(X, new ArrayList<SomeOtherObject>()) -> false matches(X, new A
I have no problem with simple callbacks when free function passed as parameter to another, thanks to @flexo. But assume bit more difficult C interface: typedef struct { int id; const char* name; } Item; typedef struct { int value; Items_Callback callback; void *context; } Items_Call; typedef int (*Items_Callback)(const Item *item, void *context); int Items_create(const I
当自由函数作为参数传递给另一个函数时，我对简单回调没有问题，这要感谢@flexo。 但是假设C接口比较困难： typedef struct { int id; const char* name; } Item; typedef struct { int value; Items_Callback callback; void *context; } Items_Call; typedef int (*Items_Callback)(const Item *item, void *context); int Items_create(const Item *item, Items_Call *call) { ... call->cal
I am attempting to update an application that uses dependency injection, in doing so, I am trying to document each class (that needs it) with a "thread-safety" annotation, both for other coders and for bug checkers. If I have a service class, as follows: @ImplementedBy(FooImpl.class) public interface FooSrvc { } and it's associated implementation class FooImpl implements FooSr
我试图更新使用依赖注入的应用程序，这样做时，我试图用“线程安全”注释记录每个类（需要它），以供其他编码器和错误检查器使用。 如果我有一个服务类，如下所示： @ImplementedBy(FooImpl.class) public interface FooSrvc { } 这是相关的实施 class FooImpl implements FooSrvc { } *我是否应该使用线程安全注释来记录或注释接口和具体实现？ 只是服务，因为它是公开的，只是实现？*例如对于两者： @javax.annotation.
I am trying to develop an ObjectPool, which can be used with any Object without changing the source of neither the Pool nor the Object - but I can´t find any way to write the get()-function ("Maincode" getting some Object from Pool) as there is a Type-Mismatch (Cannot convert from Object to TestObject) Here´s my code so far: ObjectPool: public Object get() { int first = ava
我试图开发一个ObjectPool，它可以与任何对象一起使用，而无需更改池和对象的源代码 - 但我找不到任何方法来编写get（）函数（“Maincode”获取某个对象来自池），因为存在Type-Mismatch（无法从Object转换为TestObject） 这是我的代码到目前为止： ObjectPool的： public Object get() { int first = availableObjects.get(0); availableObjects.remove(0); return objects.get(first); } 在对
Using a Oracle Multi Consumer Queue the messages remains in the queue table after it was dequeued. retention is set to 0. Creating the Queue Table: BEGIN DBMS_AQADM.CREATE_QUEUE_TABLE( Queue_table => '"ZEE_EXEC"."ZEE_SYNC"', Queue_payload_type => 'ZEE_EXEC.T_SYNC', storage_clause => 'PCTFREE 10 PCTUSED 40 INITRANS 1 MAXTRANS 255 TABLESPACE ZEE_GENERAL',
使用Oracle多消费者队列时，消息出队后，消息仍保留在队列表中。 保留设置为0。 创建队列表： BEGIN DBMS_AQADM.CREATE_QUEUE_TABLE( Queue_table => '"ZEE_EXEC"."ZEE_SYNC"', Queue_payload_type => 'ZEE_EXEC.T_SYNC', storage_clause => 'PCTFREE 10 PCTUSED 40 INITRANS 1 MAXTRANS 255 TABLESPACE ZEE_GENERAL', Sort_list => 'ENQ_TIME', Multiple_consu
I have to asynchronously push some files in from my system A to system B. For that i have created a JMS Consumer. Once Entries are made in queue successfully using an enqueue stored procedure in oracle. My consumer should read the message and send it to system B. Here is my Listeners Code public class DMSCustomMessageListener extends DefaultMessageListenerContainer{ protected MessageCo
我必须将某些文件从我的系统A异步推送到系统B.为此我创建了一个JMS消费者。 一旦使用oracle中的入队存储过程成功地在队列中创建入口。 我的消费者应该阅读该消息并将其发送给系统B. 这是我的听众代码 public class DMSCustomMessageListener extends DefaultMessageListenerContainer{ protected MessageConsumer createConsumer(Session session, Destination destination) throws JMSException {