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Admin
Admin
Asked: October 6, 20242024-10-06T04:58:15+05:30 2024-10-06T04:58:15+05:30In: Java

How to check the installed Java version on the IBM i machine?

I have logged in to the IBM I machine and I have to check the installed Java version on my IBM i machine so that I can make a check based on the Java version installed and execute some logic. Any idea how can I find it?

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  1. Admin
    Admin
    2024-10-06T05:04:57+05:30Added an answer on October 6, 2024 at 5:04 am

    You can print the output of the RUNJVA command to get the installed Java version on IBM i by running runjva class(*version) output(*print) command from the command line.

    Please note that this RUNJVA command will be executed in a separate batch Job on IBM i where the Job name QJVACMDSRV is fixed and the user name is your user profile and the number is auto-generated. The output gets printed to the QPRINT spool file in the same batch job.

    java version "1.8.0_411" 
    Java(TM) SE Runtime Environment (build 8.0.8.25 - pap6480sr8fp25-20240328_01(SR8 FP25)) 
    IBM J9 VM (build 2.9, JRE 1.8.0 OS/400 ppc64-64-Bit Compressed References 20240305_66992 (JIT enabled, AOT enabled) 
    OpenJ9 - e3126d7 
    OMR - f2f50a8 
    IBM - b81b1e2) 
    JCL - 20240322_01 based on Oracle jdk8u411-b09 
    Java program completed 
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  2. Admin
    Admin
    2024-10-06T05:02:32+05:30Added an answer on October 6, 2024 at 5:02 am

    You can also check the installed Java version on IBM i by running qsh cmd('java -version') command on the IBM i command line which invokes the Qshell environment and checks the Java version from within the shell.

    The output you will get:

    java version "1.8.0_411" 
    Java(TM) SE Runtime Environment (build 8.0.8.25 - pap6480sr8fp25-20240328_01(
    SR8 FP25)) 
    IBM J9 VM (build 2.9, JRE 1.8.0 OS/400 ppc64-64-Bit Compressed References 202
    40305_66992 (JIT enabled, AOT enabled) 
    OpenJ9 - e3126d7 
    OMR - f2f50a8 
    IBM - b81b1e2) 
    JCL - 20240322_01 based on Oracle jdk8u411-b09 
    Press ENTER to end the terminal session. 

    Please note that if multiple versions of Java are installed, this will show the default Java version in use.

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  3. Admin
    Admin
    2024-10-06T05:00:24+05:30Added an answer on October 6, 2024 at 5:00 am

    You can execute the RUNJVA command on the IBM i which is used to run Java commands on the IBM i machine.

    When you run RUNJVA CLASS(*VERSION), it will display the installed Java version on your IBM i machine.

    The output of this command would look like:

    Java Shell Display

    java version "1.8.0_411"
    Java(TM) SE Runtime Environment (build 8.0.8.25 - pap6480sr8fp25-20240328_01(SR8 FP25))
    IBM J9 VM (build 2.9, JRE 1.8.0 OS/400 ppc64-64-Bit Compressed References 20240305_66992 (JIT enabled, AOT enabled)
    OpenJ9 - e3126d7
    OMR - f2f50a8
    IBM - b81b1e2)
    JCL - 20240322_01 based on Oracle jdk8u411-b09
    Java program completed

    Here, as per the above output, the Java version is 1.8.0_411 which is a specific build of Java 1.8 (Java 8).

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