因此,使用JDK 11可以正常工作。在学习JEE时,我不得不切换到旧版本的jdk以确保与所有其他技术的完全兼容性。所以我下载了jdk1.8.0_191并安装了它。我在Eclipse中从“窗口”>“ Java”>“已安装的JRE”切换了jdk。我的程序是一个普通的Java项目,试图在mysql数据库中编写。切换并运行程序后,出现此弹出错误:
并且我的控制台显示下一个错误:
Exception in thread "main" java.lang.UnsupportedClassVersionError: com/exemple/ProgrammTest has been compiled by a more recent version of the Java Runtime (class file version 54.0), this version of the Java Runtime only recognizes class file versions up to 52.0
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:763)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:468)
at java.net.URLClassLoader.access$100(URLClassLoader.java:74)
at java.net.URLClassLoader$1.run(URLClassLoader.java:369)
at java.net.URLClassLoader$1.run(URLClassLoader.java:363)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:362)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:495)
有帮助吗?