Textmate broke my Java? Exception in thread "main" java.lang.NoClassDefFoundError

I ran a Java program using TextMate on OS X once and I can't use Java anywhere else anymore.

On the simplest program, I get:

Exception in thread "main" java.lang.NoClassDefFoundError: Gateway (wrong name: org/mcgill/telecom/Gateway)

Whether I use javac -classpath . Gateway.java, java -classpath . Gateway or Eclipse or N开发者_如何学Goetbeans.

The exact same program can still run in TextMate using cmd-R, but nowhere else.

What happened to my Java?

I highly doubt that a text editor did that.

Anyway, java -classpath . Gateway wouldn't work if that class is in the package org.mcgill.telecom (which the folder structure suggests).

Try java -classpath . org.mcgill.telecom.Gateway instead from the folder where the org folder can be seen.

Here's what you can do to test it.

• go to a temp folder and create this folder structure: org/mcgill/telecom;
• create a file called Gateway.java in the telecom folder;
• copy the contents below in your Gateway.java file;
• open a command prompt and navigate to your temp folder;
• execute javac org/mcgill/telecom/Gateway.java
• execute java -classpath . org.mcgill.telecom.Gateway

This is what I get:

bart@hades:~$ cd Temp/
bart@hades:~/Temp$ ls
org
bart@hades:~/Temp$ javac org/mcgill/telecom/Gateway.java 
bart@hades:~/Temp$ java -classpath . org.mcgill.telecom.Gateway
Oi, it works!
bart@hades:~/Temp$ 

Here the Gateway class:

package org.mcgill.telecom;

public class Gateway {
  public static void main(String[] args) {
    System.out.println("Oi, it works!");
  }
}