javac problems

[bakerb]

I just installed jdk 1.3.0 and it doesn't seem t be working right. The ackages are having trouble seeing eachother. Sometimes they do, but usually i get errors that look like

Parse/Yylex.java:8: cannot resolve symbol
symbol : class Symbol
location: class Symbol.Symbol
import Symbol.Symbol;


my classpath looks like this:
[bakerb@gso56-176-203 checkpoint2]$ echo $CLASSPATH
.:/usr/share/jlex_cup


any ideas?

Keep on rockin' in the free world

[nanode]

Those types of errors are most common when running apps, not compiling. AFAIK - jdk1.3.x you don't explicitly *need* a classpath to compile and runs classes in the present directory.

If you do a simple HelloWorld.java, does it compile and run ok? I'm a little unclear about what's up.

[bakerb]

Good call, i compiled this fine (it is in Main.java):

public class Main
{
public static void Main(String[] args)
{
System.out.println("Hello World");
}
}

Then, from the same directory it is in, i do:

javac Main
and it gives me a NoClassDef error like so:
Exception in thread "main" java.lang.NoSuchMethodError: main

I get te same thing for:
java Main.class

any ideas?

[Marcel2008]

Main is a keyword you cannot use as class-name.
Try this:

public class HelloWorldApplet
{
public static void Main(String[] args)
{
System.out.println("Hello World");
}
}

javac HelloWorldApplet
to run:
java HelloWorldApplet

[Paul Weaver]

:eek:

use main, not Main. Java methods are case sensitive.

I'd guess you can use "Main" as a class, too.

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

[nanode]

HEY...

to compile:

javac MyClass.java (.java extension required)

to run:

java MyClass (.class extension ommitted)

[Dru Lee Parsec]

Also, the Main.class file needs to be in your classpath. For a decent description of how classpaths and packages are related check out http://tapper.sourceforge.net/ and go to the readme file page. As you scroll down there's a page with a brief description of Classpath.