# Choosing a JAX-WS runtime

Before you can create a JAX-WS Web service in STP, you need to point Eclipse at a JAX-WS runtime installed on your machine.

STP supports the following JAX-WS runtimes:

- Apache Incubator CXF, which also ships as the IONA FUSE Services Framework product
- JAX-WS Reference Implementation (JAX-WS RI)

To choose a runtime:

1. Select Window > Preferences from the menu bar.
2. Select SOA Tools > Installed Runtimes .
3. In the Installed Server Runtime Environments preferences panel, click Add.
4. In the New Server runtime wizard, do one oof the following:
   - Expand the Apache folder and select Apache CXF 2.0
   - Expand the Sun folder and select Sun JAX-WS RI 2.1.2
5. Click Next..
6. In the New ... Runtime panel, click Browse to select the directory where your JAX-WS runtime is installed.
7. Choose an alternative JRE, if required.
8. Click Finish.