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Java error java.lang.noclassdeffounderror
Posted on: November 3, 2008 at 12:00 AM

The Java.lang. noclassdeffounder occurred in a code when the programmer write a wrong class name on the command prompt during the execution or running of the program.

Java error java.lang.noclassdeffounderror

The Java.lang. noclassdeffounder occurred in a code when the programmer write a wrong class name on the command prompt during the execution or running of the program.

Understand with Example

In this Tutorial we want to describe you a case that helps you in understanding a java.lang.noclassdeffounder.For this we have a class name 'java langnoclassdeffounder'.Inside this main class we have a main method that include -

Input Stream Reader	This is used to read a byte code that is used to decode byte code into a character stream
BufferStream Reader	This is used to read a text character stream present in a input stream reader.
readline	This is used to read a number printed on the command prompt.

On command prompt if the programmer mistakenly write a wrong class name during the running of the program, the code display you an error i.e java langnoclassdeffounder.In this example the programmer write wrong a class name javanoclassdeffounderror1 instead of writing javalangnoclassdeffounderror.Therefore on execution the code show an error java.langnoclassdeffounderror.java.

javalangnoclassdefounderror.java

import java.io.*;
public class javalangnoclassdefounderror {

  public static void main(String args[]) throws Exception{

  InputStreamReader inputStreamReader = new InputStreamReader(System.in);
  BufferedReader br = new BufferedReader(inputStreamReader);

  System.out.println("Enter a number : ");
  String num= br.readLine();
System.out.println("entered nuber is: "+num);
  }

}

Output

To solve this error you have to check wheather during compile time you have given java file name correct or not.

Download code

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