In this section you will learn about Reflection API and all of its methods. Reflection API is a powerful technique (that provides the facility) to find-out its environment as well as to inspect the class itself.
In this section you will learn about Reflection API and all of its methods. Reflection API is a powerful technique (that provides the facility) to find-out its environment as well as to inspect the class itself.In this section we are giving tutorials about Reflection framework in Java. The Reflection API of Java programming language is very powerful and can be used to find the information about the environment in which application is running.
Reflection framework was introduced in the Java 1.1 since then it is evolved to provide many new features.
Here are articles and examples of Java Reflection framework.
Reflection API : A Brief Introduction
In
this section you will learn about Reflection API and all of its methods.
Reflection
API is a powerful technique (that provides the facility) to find-out its environment as well as to inspect the
class itself. Reflection API was included in Java 1.1.
Here
we are providing few of the examples to give a better overview of the Reflection
API :
Getting
the implemented Interfaces
In this section you will learn how to
retrieve an Interface (that included in the program) by using the
getInterfaces() method. Here is an example that provides the
usage of the getInterfaces() method in more detail.
Retrieving
the
class name through Reflection API
A more generic way, how to retrieve
the name of the class (that is used in the program) that reflects the
package name by using the getName() method. Here is an example that provides the
proper way to use the getName() method.
Finding out the
superclass name of the Class
Here we show you
the way to
find out the Superclass name by using the getSuperclass() method. The given example demonstrates
the use of getSuperclass() method in more detail.
Getting
the method name used in the Application
In this section we describe how to retrieve method name
by using the getMethods() method. Here is an example that
demonstrates the use of the getMethods() method in more detail.
Finding out the object of
the Class
This section illustrates how to
retrieve an object name that reflects the package name by using the
object.getClass() method. Here is an example that provides the
proper usage of the object.getClass() method in more detail.
Finding out the class fields
This section explores you, how
to retrieve the fields of the class by using
the getFields() method. For this we are taking an example that
provides the use of the getFields() method in detailed way.
Getting information about Constructor
In this section you will learn,
how to
retrieve the information about the constructor by using the
getConstructors() method. Here is an example that provides the
usage of the getConstructors() method.
No Argument Constructor Example
In this section you will
learn how to know that whether any class consists No-Argument Constructor
or not ?. Here is an example that provides the usage
of the newInstance() method in more detail.
Getting Methods Information of a class
In this part of tutorial you
will learn how to retrieve information of all methods of a class (that included
in the program) by using the getMethods() method.
Here is an example that provides the usage of the getMethods() method in
more detail.
Identifying array using Reflection
In this section we will
describe you how to identify the object is Array or not ? with the
use of boolean method isArray(). Here
is an example that demonstrates the use of the isArray() method for
identification of Array object.
Getting Fields Information of a class
In this section of "Reflection Tutorial" you
will know how to retrieve the specific field of any class by using
the getField() method. For this we are taking
an example that provides the use of the getField() method in detailed
way.
Getting Component type
In this section you will come to know that how you can
retrieve Component Type of an array's element. The component type of an Array is
the type of array's element.
Examine Interface Example
In this part of tutorial we will discuss how do you
know that whether a given class is an "Interface" or a "Class"?
Class Modifier Example
In this section you will
learn how to retrieve modifier's information of a class that we have
taken in our program.
Calling ( Invoking ) Methods through Reflection
In previous sections we have seen that how we can use "Reflection"
to get information related to any Method. Now in this section of the tutorial
you will come to know that we can also call methods of a class with the help of
"Reflection"
Setting Fields Information of a class using Reflection
As in our previous example we have seen that we can get
field values of a class by using the Field class. Now we can also set
different field values of that class by using set() method.
Ads