Enterprise Java for Linux HOWTO 

Developer Kit. 

export JAVA_HOME=/usr/local/ibm/jdk118

The $JAVA_HOME/bin directory has the Java compiler (javac) and the Java Virtual Machine (java) as well

as other necessary programs for development. Add $JAVA_HOME/bin to your PATH. 

export PATH=$JAVA_HOME/bin:$PATH

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. 

Initially I suggest adding the following JARs to your CLASSPATH. JARs can be packaged in either .jar or

.zip files. 

For instance: 

export CLASSPATH=$JAVA_HOME/lib/classes.zip

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: 

Confirming Your Installation 

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