<分区>
GP 是我从here 下载的.exe 文件.当我尝试运行它时，我收到以下错误:
C:\GPP> gp -list
Exception in thread "main" java.lang.UnsupportedClassVersionError: pro/javacard/gp/GPTool : Unsupported major.minor version 52.0
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.access$100(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.launcher.LauncherHelper.checkAndLoadMain(Unknown Source)
C:\GPP>
我该如何处理？我应该删除 JRE 并安装新版本还是旧版本？
我当前的版本:
C:\GPP> java -version
java version "1.7.0_21"
Java(TM) SE Runtime Environment (build 1.7.0_21-b11)
Java HotSpot(TM) 64-Bit Server VM (build 23.21-b01, mixed mode)
C:\GPP> javac -version
javac 1.7.0_21
C:\GPP>
是否可以强制 Java 使用特定的 major.minor 版本来运行程序？