A friend of mine was asking me how to generate a unique ID for his application... As you probably already know Java SE 5 has introduced the java.util.UUID class to easily generate Universally Unique Identifier (UUID). As usual Wikipedia is a great starting point to learn more about UUID.
Generating the unique ID is as simple as calling the method UUID.randomUUID() in the class. This will give a new instance of UUID that you can now manipulate; for example do a toString() to get the UUID string representation as describe in the specifications; for example 5462dc18-4653-42d1-b4e4-22fc970a6ce5
Resources:
Tuesday, August 7, 2007
Thursday, August 2, 2007
OracleAS, OC4J and Java EE releases....
This morning I was helping a customer to debug some Web Services deployment issues, when I simply realized that the error was coming from the fact that he was trying to deploy a JAX-RPC service on a OracleAS 10gR2 server; where it is not supported/available.
This give me the opportunity to clarify the different versions of the Oracle Application Server and their related Java Enterprise Edition release support.
| Oracle AS Release | J2EE/Java EE Release | Comments/Extensions | Certification Matrix |
| 11.1.0.0 | Java EE 5.0 |
|
|
| 10.1.3.x (Oracle AS 10gR3) |
J2EE 1.4 |
|
OTN Certicification Matrix |
| 10.1.2.x (Oracle AS 10gR2) |
J2EE 1.3 | OTN Certicification Matrix | |
| 9.0.4.x | J2EE 1.3 | OTN Certicification Matrix | |
| 9.0.3.x | J2EE 1.3 | OTN Certicification Matrix |