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#Java reflection getdeclaredmethods example how to#

Parametertype - parameter is an array of Class objects Name- the name of method whose object is to be created The syntax for this method isĬlass.getDeclaredMethod(name, parametertype) GetDeclaredMethod() : To create an object of method to be invoked.

We use below two methods for this purpose We can invoke an method through reflection if we know its name and parameter types. of the access specifier used with the method allows the object to access the method irrespective Method methodcall3 = cls.getDeclaredMethod("method3") Creates object of the desired method by providing Method methodcall2 = cls.getDeclaredMethod("method1") method name as argument to the getDeclaredMethod Creates object of desired method by providing the takes object and the new value to be assigned of the access specifier used with the field allows the object to access the field irrespective creates object of the desired field by providing Method methodcall1 = cls.getDeclaredMethod("method2", method name and parameter class as arguments to creates object of desired method by providing the Getting methods of the class through the object Getting the constructor of the class through theĬonstructor constructor = cls.getConstructor() Creating class object from the object using Creating object whose property is to be checked Public static void main(String args) throws Exception Creating a public method with int as argument Creating a public method with no arguments A simple Java program to demonstrate the use of reflection

Methods The getMethods() method is used to get the public methods of the class to which an objects belongs.

Constructors The getConstructors() method is used to get the public constructors of the class to which an object belongs.

Class The getClass() method is used to get the name of the class to which an object belongs.

Reflection can be used to get information about –

Through reflection we can invoke methods at runtime irrespective of the access specifier used with them.

Reflection gives us information about the class to which an object belongs and also the methods of that class which can be executed by using the object.

The required classes for reflection are provided under package.

Reflection is an API which is used to examine or modify the behavior of methods, classes, interfaces at runtime.

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#Java reflection getdeclaredmethods example how to#

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