RD/z Creating a simple Java project

package com.wd.ea.ut;
import java.io.PrintWriter;
import com.ibm.cics.server.*;
 
/**
* The HelloWorld class is our first RD/z application targeted for CICS.
* <p>
* This class will use a few classes provided in the dfjcics jar file.
* <p>
*
* @author      John Smith
* @version     1.0
*/
public class HelloWorld {
 
/**
* Main method will be invoked to create CICS objects and
* print messages to the terminal.
* <p>
*/
public static void main(CommAreaHolder commArea) {
try {
PrintWriter out = getOutputWriter();
Task task = Task.getTask();
out.println();
out.println("----------------------------------------------");
out.println("Hello " + task.getUSERID() + ", welcome to CICS!");
out.println();
out.println("This is program " + task.getProgramName());
out.println();
out.println("Transaction name is " + task.getTransactionName());
out.println();
out.println("CICS region sysid is " + Region.getSYSID());
out.println();
out.println("This region applid is " + Region.getAPPLID());
out.println();
out.println("----------------------------------------------");
} catch (Throwable e) {
System.err.print(e);
}
}
 
/**
* Return the terminal principal facility, or <code>null</code>
* if the transaction is not associated with a terminal.
* <p>
* @return TerminalPrincipalFacility object if it exists, null otherwise.
*/
private static TerminalPrincipalFacility getTerminal() {
Object principalFacility = Task.getTask().getPrincipalFacility();
if (principalFacility instanceof TerminalPrincipalFacility)
return (TerminalPrincipalFacility) principalFacility;
else
return null;
}
 
/**
* Is the transaction associated with a terminal?
*
* @return boolean value of whether terminal primary facility exists or not.
*/
private static boolean haveTerminal() {
return getTerminal() != null;
}
 
/**
* Return a PrintWriter that is either directed at the terminal, if
* we have one, or to <code>System.out</code> if not.
* <p>
* @return PrintWriter object which is either the primary facility or
* the System.out object.
*/
private static PrintWriter getOutputWriter() {
if (haveTerminal())
return   Task.getTask().out;
else
return new PrintWriter(System.out, true);
}
}