Error: Could not find or load main class TestEnum | Java

By - 
   /**
* @author Shashank Shekhar
*  @version 1.0
* This program test enum under if condition
*/
package Chapter3;
public class TestEnum
{
 enum Season {spring, summer, fall, winter};
 
 public static void main(String[] args)
 {
  Season W1 = Season.summer;
  if(W1.equals(Season.winter))
  {
   System.out.println("Well....Weather is Winter...");
  }
  else
  {
   System.out.println("Well....Weather is Not Winter...");   
  }
 }
}


Generally what happen when we compile a normal java program without any package (or namespace in C#) is that ".class" is generated in place where ".Java" files is placed.

So, executing below command will generate TestEnum.class in folder where TestEnum.java is located.

D:\Temp\javac TestEnum.java




But problem starts once you have put or create any namespace/package in ".java" file.

So executing below command results in given error even if everything is correct.

D:\Temp\java Chapter3.TestEnum
Error: Could not find or load main class TestEnum

Work around :
Found many articles talking about similar problem but with different solutions of trying classpath which did not work for this problem. There is twist while compiling a file manually on command line, especially those having package name specified on the top of program. Just include -d option with . which denotes current directory, and java compiler creates a dedicated folder as per the name of package provided in the class.

D:\Temp\javac -d . TestEnum.java









Please note that -d option does have impact only when there is any package name exclusively specified over the top of class, otherwise, it will also have same behavior as if  -d option were not present while compiling.

Comments

Post a Comment

Popular posts from this blog

Dynamic Predicate Builder Not Passing Parameters of OR Clause to SQL Server

By -
Are you using Predicate Builder to frame search query Or where clause for Linq to SQL or Entity Framework to SQL Server ?  Many times we are into such situations where search request having multiple search criteria like first name, last name, userid etc, but search query should be issued only if user has passed or provided those values, if user or User interface (UI) has not supplied anything to your service, service should not issue those parameters in search or Where clause. There is useful library/class available to reduce the turnaround time. But there is great catch in that class. public static class PredicateBuilder { /// /// Creates a predicate that evaluates to true. Use with mandatory Criteria /// public static Expression > True () { return param => true; } /// /// Creates a predicate that evaluates to false. Use where Criteria is optional /// public static Expression ...
Continue Reading...»

Na Mantram No Yantram (Durga Stuti)

By -
Image
Na Mantram No Yantram Tadapi Cha Na Jaane Stuti Maho. Na Chaa Vaanam Dhyaanam Tadapi Cha Na Jaane Stuti Kathaa. Na Jaane Mudraaste Tadapi Cha Na Jaane Vila Panam. Param Jaane Maata Twa Danu Saranam Klesha Haranam. I do not know mantras (short prayers) or yantras (how to pray). I do not know how to do puja or pray. I do not know how to invoke your name. I do not know how to medicate. I do not know any stutis (long prayers) or kathas (long prayers). I do not know any mudras (signs). I do not know how to implore deep pleading. I do know one thing, though. I knot that if I follow you, then within the folds of your love, I will be released from all my troubles. Vidher Agnaa Nenaa Dravina Vira Henaa Lasatayaa. Vidheyaa Shakyat Vaa Tava Charana Yoryaa Chyutir Abhut. Tad Etat Ksantavyam Janani Sakalo Dhaarini Shive. Kuputro Jaayeta Kvachi Dapi Kumaata Na Bhavati. Oh, Mataji, liberator of all without discrimination, I do not know how to do puja, and I am by n...
Continue Reading...»