java.lang.reflect package

By: Riktesh Srivastava Emailed: 1768 times Printed: 2515 times    

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In this tutorial, I will explain the aspects of java.lang.reflect package. This package returns, constructors, fields, and methods of the given package. Each and every program begins by using the forName( ) method of Class to get a class object for java.lang.Object. Once this is obtained, getConstructors(), getFields(), and getMethods() are used to analyze this class object. They return arrays of Constructor, Field, and Method objects that provide the information about the object. The Constructor, Field, and Method classes define several methods that can be used to obtain information about an object.

Consider the example given below:

import java.lang.reflect.*;

class program
public static void main(String args[])

Class c = Class.forName("java.lang.Object");
Constructor constructors[] = c.getConstructors();
for(int i = 0; i < constructors.length; i++) {
System.out.println(" " + constructors[i]);
Field fields[] = c.getFields();
for(int i = 0; i < fields.length; i++)
System.out.println(" " + fields[i]);
Method methods[] = c.getMethods();

for(int i = 0; i < methods.length; i++)
System.out.println(" " + methods[i]);
catch(Exception e)
System.out.println("Exception: " + e);

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1. View Comment

Excellent article. Please make the email id of the author public so that we can ask more questions, in case of doubt

View Tutorial          By: Rajita at 2008-03-25 09:31:27
2. View Comment

Hi Rajita, in accordance to our 'Privacy Policy' we do not publish the author's emails as it will lead to SPAMMING activities. Thanks for your understanding. If you would like to ask more questions with regards to this tutorial you may access the author's url at <a href="" rel="nofollow"></a>

View Tutorial          By: webmaster at 2008-03-25 18:49:39
3. View Comment

This is very good article.

View Tutorial          By: Vipin Joshi at 2008-03-27 13:53:26

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