Java:在Linux中安装GridWorld BugRunner

Question

我对Java非常陌生，我正在阅读http://greenteapress.com/thinkjava。

我无法运行GridWorld代码。

按照指示：

$ javac -classpath .:~/projects/GridWorldCode/gridworld.jar *.java 

上面的编译没有错误。当我执行编译后的代码时，会得到以下错误：

$ java BugRunner      

Error: A JNI error has occurred, please check your installation and try again
Exception in thread "main" java.lang.NoClassDefFoundError: info/gridworld/actor/Actor
at java.lang.Class.getDeclaredMethods0(Native Method)
at java.lang.Class.privateGetDeclaredMethods(Class.java:2701)
at java.lang.Class.privateGetMethodRecursive(Class.java:3048)
at java.lang.Class.getMethod0(Class.java:3018)
at java.lang.Class.getMethod(Class.java:1784)
at sun.launcher.LauncherHelper.validateMainClass(LauncherHelper.java:544)
at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:526)
Caused by: java.lang.ClassNotFoundException: info.gridworld.actor.Actor
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 7 more

Answer 1

这对你是有用的：

java -cp .:/<path_to_your_gridworld_dir>/gridworld.jar: BugRunner