Display Detailed Java Version Information

Resolving The Problem

Use the following methods to get more detailed version information about the JDK being used.

If running on i5/OS V5R3, use the following commands:

QSH
java -Djava.version=1.4 PropDump

It will output alot of information, and the version will look like this:

...
os400.gc.heap.size.init=16384                                  
java.runtime.version=1.4.2_16-b05                             
java.awt.graphicsenv=com.ibm.as400.system.NoGraphicsEnvironment
...

If running on i5/OS V5R4 or V6R1, use the following commands:

QSH
java -Djava.version=1.4 -version

The output will be:

java version "1.4.2"                                                
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.2_16-b05)
Classic VM (build 1.4, build JDK-1.4, native threads, jitc_de)      
$

If running on IBM i V5R4 or beyond and using IBM Technology for Java JVM(J9), use the following commands:

QSH
export JAVA_HOME=/QOpenSys/QIBM/ProdData/JavaVM/jdk50/32bit
java -version

The output will be:

java version "1.5.0"                                                                            
Java(TM) 2 Runtime Environment, Standard Edition (build pap32devifx-20110211 (SR12 FP1 +IZ94331))
IBM J9 VM (build 2.3, J2RE 1.5.0 IBM J9 2.3 OS/400 ppc-32 j9vmap3223sr12-20100713 (JIT enabled)  
J9VM - 20100629_60535_bHdSMr                                                                    
JIT  - 20100623_16197_r8                                                                        
GC   - 20100211_AA)                                                                              
JCL  - 20100813