Runtime Error :(

[Landon Ross]

Oy, first post.

I'm new-ish to java. Learned it once, forgot most it and am re-learning it now.

So I picked up the Headfirst java book, cuz it looked like more fun then most dry manuals you get for programming, and first program in the book, I've hit a nasty looking wall.

Heres the code:

 
public class MyFirstApp {
 
    public static void main(String[] args){
 
System.out.println("I rule!");
System.out.println("The world");
 
    }
} 

the filename is MyFirstApp.java. It compiles fine, but at runtime I get the error

Exception in thread "main" java.lang.UnsupportedClassVersionError: MyFirstApp (U nsupported major.minor version 49.0)
        at java.lang.ClassLoader.defineClass0(Native Method)
        at java.lang.ClassLoader.defineClass(ClassLoader.java:539)
        at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:12 3)
        at java.net.URLClassLoader.defineClass(URLClassLoader.java:251)
        at java.net.URLClassLoader.access$100(URLClassLoader.java:55)
        at java.net.URLClassLoader$1.run(URLClassLoader.java:194)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:187)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:289)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:274)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:235)
        at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:302)
  

where have I gone wrong?

[Landon Ross]

Sorry. Ignore the question. I was using a java compiler for 1.4 (dont ask me how, I've only installed 1.5) and a java 1.5 JVM.

If anybody knows off the top of their head does SuSE 9.3 proffesional come with java 1.4.x installed by default? That might be why it happened. No pressure to answer though, it works now .

[Sonny Gill]

Originally posted by Landon Ross:

If anybody knows off the top of their head does SuSE 9.3 proffesional come with java 1.4.x installed by default?

I know that SuSe 9.2 does that.