Question

I just upgraded to the latest Java

> java -version
java version "1.7.0_03"
Java(TM) SE Runtime Environment (build 1.7.0_03-b05)
Java HotSpot(TM) 64-Bit Server VM (build 22.1-b02, mixed mode)
> javac -version
javac 1.7.0_03

I am having issues to execute Java program from the command-line. For instance:

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

I compiled it on the command-line, then try to execute it:

> javac Tester.java
> java Tester
Error: Could not find or load main class Tester

Is this a bug?
Strangely, I have no problem to execute the program using Eclipse.

Answer 1

Is your CLASSPATH environment variable set? When I do

export CLASSPATH=/tmp
java Tester

I get a NoClassDefFoundError, though not the exact same error message you quoted.