Running the Hello World examples

You can run two “Hello World” examples: HelloWorld and HelloCICSWorld. The HelloWorld example uses only Java™ services and HelloCICSWorld uses JCICS.

Before you begin

Ensure the CICS® region is configured, as described in Running the JCICS examples.

About this task

The programs are started by sample CICS transactions. The examples use the following Java classes and CICS programs:

Example	Transaction	Program	Java class
HelloWorld	JHE1	DFJ$JHE1	`HelloWorld`
HelloWorld	JHE1	DFH$JSAM (C program)	N/A
HelloCICSWorld	JHE2	DFJ$JHE2	`HelloCICSWorld`

DFH$JSAM is a standard CICS program that could be written in any of the CICS-supported languages. If, for example, you do not have a C compiler, you could write a COBOL version of DFH$JSAM and use it in place of the supplied C version. Alternatively, you can bypass DFH$JSAM altogether by changing the JHE1 TRANSACTION definition to run program DFJ$JHE1. However, if you change the definition, the Java program does not write anything to the terminal; so your only indication that the application has run successfully is the message in the stdout file.

Procedure

Enter the JHE1 transaction in a terminal to run the standard Java application. You receive the following messages from JHE1:
The following message is returned to your terminal:
```
SAMPLE *COMPLETED*, SEE STDOUT
```
The following entry is written to the stdout file:
```
Hello from a regular Java application
```
Enter the JHE2 transaction in a terminal to run the JCICS application. You receive the following message from JHE2 on your terminal:
```
Hello from a Java CICS application
```

Results

You have successfully run the Hello World examples.

What to do next

You can run the other examples to try out different services that are available to Java programs in CICS.