NoInitialContextException when calling an EJB from a java client

Exception in thread "main" javax.naming.NoInitialContextException: Need to specify class name in environment or system property, or as an applet parameter, or in an application resource file: java.naming.factory.initial
at javax.naming.spi.NamingManager.getInitialContext(NamingManager.java:645)
at javax.naming.InitialContext.getDefaultInitCtx(InitialContext.java:247)
at javax.naming.InitialContext.getURLOrDefaultInitCtx(InitialContext.java:284)
at javax.naming.InitialContext.lookup(InitialContext.java:351)
at helloworldclient.Main.main(Main.java:34)

Cause:
The initial context is not set.

Solution:
Set the initial context via jndi.properties or programatically:
properties.put("java.naming.factory.initial","org.jnp.interfaces.NamingContextFactory");
properties.put("java.naming.provider.url","jnp://localhost:1099");
Context ic = new InitialContext(properties );