CODEWITHSUNDEEP
javaeclipselucene
JerrittPace
JerrittPace

Reputation: 21

Error: Could not find or load main class

I am trying to run a java file in the cmd prompt in Windows 7.

I get the error:

Error: Could not find or load main class

I actually just save a new simple file to check if there were problems with the package inside eclipse; this new file is saved just as: 

C:\Users\User5\Documents\eclipse\test\Example.java

class Example {
    // A Java program begins with a call to main().
    public static void main(String args[]) {
    System.out.println("Test.");
    }
}

I changed the classpath for lucene's jar's recently, and I am not really sure if this is the problem.

There are many other threads about this issue, such as:

Could not find or load main class

but, there seem to be other concerns that solved their issues.

In this case, I have saved just a plain file in notepad, and while I can get the file to compile, and it seems to create the class file, it is still spitting this error back.

This is the dir, which seems to show that the class is there:

C:\Users\User5\Documents\eclipse\test>dir
 Volume in drive C has no label.
 Volume Serial Number is 3E0D-3B82
 Directory of C:\Users\User5\Documents\eclipse\test

12/07/2015  10:15 AM    <DIR>          .
12/07/2015  10:15 AM    <DIR>          ..
12/07/2015  10:04 AM               301 .classpath
12/07/2015  10:04 AM               380 .project
12/07/2015  10:04 AM    <DIR>          .settings
12/07/2015  10:05 AM    <DIR>          bin
12/07/2015  10:51 AM               428 Example.class
12/07/2015  10:15 AM               162 Example.java
12/07/2015  10:05 AM    <DIR>          src
               4 File(s)          1,271 bytes
               5 Dir(s)  10,000,461,824 bytes free


C:\Users\User5\Documents\eclipse\test>java Example.java
Error: Could not find or load main class Example.java

Upvotes: 0

Views: 1760

Answers (5)

Zia Khan
Zia Khan

Reputation: 425

The reason could be any ... try resolving this. enter image description here

Upvotes: 0

dikoder
dikoder

Reputation: 1

I got the same error when I needed to take inputs(arguements) at runtime using terminal/Command prompt and corrected it it by compiling and running the java class as below:

  • javac packageName/Example.java
  • java packageName/Example

NOTE: The reason for this error in my case was that the java class was created inside a package and that required compilation and execution in a different way as above mentioned.

Upvotes: 0

Frederic Henri
Frederic Henri

Reputation: 53713

C:\Users\User5\Documents\eclipse\test>java Example.java

will not run - take out the .java part and simply run

C:\Users\User5\Documents\eclipse\test>java Example

To make sure you do not have an issue with your CLASSPATH variable, do

set CLASSPATH=
java Example

If that is the issue, your classpath variable gets corrupted, you can go to the Control Panel, somewhere in the advanced section to update environment variables.

Upvotes: 0

JerrittPace
JerrittPace

Reputation: 21

I think I need to make this in a larger post:

C:\Users\User5\Documents\java\test>java Example Error: Could not find or load main class Example

I just accidentally posted the wrong copy to the original post here, but the file is not running as just a call to the file. This is not the only file I cannot get running; nothing will run in the cmd prompt, although everthing runs fine in eclipse.

Thank you'all for your help, I really appreciate you!!

Upvotes: 1

Jan
Jan

Reputation: 13858

This should to the trick - don't append .java 

C:\Users\User5\Documents\eclipse\test>java Example

Upvotes: 1

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