Error:Could Not Find or Load Main Class

I can clearly see the .class file in my java folder.
I type in java (FILE NAME) in the windows command prompt, I get the error: Could not find or load main class.
I got the .class file from typing in, javac (FILE NAME)

Please tell me what is wrong. If you need a copy of my code please tell me.

Quote:

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Originally Posted by vickyv200

I type in java (FILE NAME) in the windows command prompt,

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with file extension? if so, that's your fault

Quote:

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Originally Posted by vickyv200

I get the error: Could not find or load main class.

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code?
full error message?
.....

Quote:

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Originally Posted by eRaaaa

with file extension? if so, that's your fault


code?
full error message?
.....

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Yes, the file is a .java file, no I do not type .java. I am able to run the code when I use java -cp . FILENAME but not java. This applies to everything I have made, here is an example.

public class test{
public static void main(String[] args) {
System.out.println("test");
}
}

The full error message is Error:Could Not Find or Load Main Class test

Well, your code sample works for me.

Some notes:
1. Make sure your class names start with a capital letter, as java code convention dictates
2. Java is case sensitive, so the name of the class and the actual java file must be the same:

Code:

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public class Test{
    //...

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and
Test.java

These must match exactly. Once you compile with javac, you should get Test.class. Run this with:
java Test

You also must make sure that when you run the file, you are in the same folder (or the top level of your package tree if using packages!)