Enterprise Java for Linux HOWTO 

Note that $JAVA_HOME/bin was added to the front of the PATH so that the installed JDK will be used

rather than any JDK that might have come with your Linux distribution. 

To confirm that your PATH is correctly set up, check which Java compiler and JVM will be used. 

which javac

which java

The output should reference javac and java in your $JAVA_HOME/bin directory. 

The CLASSPATH environment variable references all JARs and directories that you will need to compile

and run Java programs. 

For JDK 1.2.2, you don t need to initially add any JARs to your CLASSPATH. JARs can be packaged in

either .jar or .zip files. 

export CLASSPATH=$CLASSPATH:.

Confirming Your Installation 

You are now ready to compile and run a simple application.  Create the following program. 

class HelloWorld {

  public static void main (String[] args) {

    System.out.println("Hello, World!");

  }

}

Compile the program with the Java compiler. 

javac HelloWorld.java

If the compiler produces errors, double check the syntax and confirm your PATH and CLASSPATH. 

Run the program with the JVM. 

java HelloWorld

If the JVM produces errors, confirm your PATH and CLASSPATH. 

You should see the following output: 

Hello, World!

Congratulations, you have installed, set up an environment for, and tested the Blackdown JDK on Linux. 

More Information 

For more information on the Blackdown JDK, see the Blackdown website at 

http://www.blackdown.org

.

There is an excellent FAQ available. 

Confirming Your Installation 

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