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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.

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);



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

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