home | O'Reilly's CD bookshelfs | FreeBSD | Linux | Cisco | Cisco Exam    

Java in a Nutshell

Previous Chapter 23
The java.beans Package
Next
 

23.10 java.beans.MethodDescriptor (JDK 1.1)

A MethodDescriptor object is a type of FeatureDescriptor that describes a method supported by a Java bean. The BeanInfo class for a Java bean optionally creates MethodDescriptor objects that describe the methods the bean exports. While a BeanInfo class creates and initializes MethodDescriptor objects, it is typically only application builders and similar tools that use these objects to obtain information about the methods supported by a bean.

To create a MethodDescriptor, you must specify the java.lang.reflect.Method object for the method, and optionally specify an array of ParameterDescriptor objects that describe the parameters of the method. Once you have created a MethodDescriptor object, you can use FeatureDescriptor methods to provide additional information about each method.

public class MethodDescriptor extends FeatureDescriptor {
    // Public Constructors
            public MethodDescriptor(Method method);
            public MethodDescriptor(Method method, ParameterDescriptor[] parameterDescriptors);
    // Public Instance Methods
            public Method getMethod();
            public ParameterDescriptor[] getParameterDescriptors();
}

Hierarchy:

Object->FeatureDescriptor->MethodDescriptor

Passed To:

EventSetDescriptor()

Returned By:

BeanInfo.getMethodDescriptors(), EventSetDescriptor.getListenerMethodDescriptors(), SimpleBeanInfo.getMethodDescriptors()


Previous Home Next
java.beans.Introspector (JDK 1.1) Book Index java.beans.ParameterDescriptor (JDK 1.1)

Java in a Nutshell Java Language Reference Java AWT Java Fundamental Classes Exploring Java










??????????????@Mail.ru