Sent from ProtonMail, encrypted email based in Switzerland. Sent with Proton Mail secure email. ------- Original Message ------- On Tuesday, September 26th, 2023 at 12:03 PM, Samuel Sieb <samuel@xxxxxxxx> wrote: > On 9/26/23 06:03, olivares33561 via users wrote: > > > > > [olivares@fedora mptmp]$ uname -a > > > > Linux fedora 6.4.15-200.fc38.x86_64 #1 SMP PREEMPT_DYNAMIC Thu Sep 7 00:25:01 UTC 2023 x86_64 GNU/Linux > > > > [olivares@fedora mptmp]$ javac Area_Triangle_Determinants.java > > > > [olivares@fedora mptmp]$ java Area_Triangle_Determinants > > > > Error: LinkageError occurred while loading main class Area_Triangle_Determinants > > > > java.lang.UnsupportedClassVersionError: Area_Triangle_Determinants has been compiled by a more recent version of the Java Runtime (class file version 65.0), this version of the Java Runtime only recognizes class file versions up to 61.0 > > > > > > Looks like the compiler you're running is newer than the runtime you're > > > using. > > > What do "javac --version" and "java --version" show? > > > What does "rpm -qa | grep openjdk" show? > > > _______________________________________________ > > > > [olivares@fedora mptmp]$ javac --version > > javac 21 > > [olivares@fedora mptmp]$ java --version > > openjdk 17.0.8 2023-07-18 > > OpenJDK Runtime Environment (Red_Hat-17.0.8.0.7-1.fc38) (build 17.0.8+7) > > OpenJDK 64-Bit Server VM (Red_Hat-17.0.8.0.7-1.fc38) (build 17.0.8+7, mixed mode, sharing) > > > So there's the problem. You're compiling with 21, but running it with > 17. You could try adding "--release 17" to the javac command when you > compile or switch the default java to 21 using the alternatives command. > Or directly specify the 17 compiler when you compile. > _______________________________________________ Dear Sir, Thank you for your help. [olivares@fedora mptmp]$ rpm -qa | grep openjdk java-17-openjdk-headless-17.0.8.0.7-1.fc38.x86_64 java-latest-openjdk-headless-21.0.0.0.35-1.rolling.fc38.x86_64 java-latest-openjdk-21.0.0.0.35-1.rolling.fc38.x86_64 java-latest-openjdk-devel-21.0.0.0.35-1.rolling.fc38.x86_64 [olivares@fedora mptmp]$ javac Ulam.java --release 17 [olivares@fedora mptmp]$ java Ulam Enter any Number 23 Given Number is : 23 You are begining with number 23 70 35 106 53 160 80 40 20 10 5 16 8 4 2 1 Ulam count is 15 [olivares@fedora mptmp]$ Is there a better way to avoid doing this, ie removing java 17 and forcing 21 ? or vice versa to avoid this. I had not encountered this before in previous versions of Fedora it just worked! Now I have to specify. What would be the best thing to do? and make it work correctly. Best Regards, Antonio _______________________________________________ users mailing list -- users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to users-leave@xxxxxxxxxxxxxxxxxxxxxxx Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/users@xxxxxxxxxxxxxxxxxxxxxxx Do not reply to spam, report it: https://pagure.io/fedora-infrastructure/new_issue
