Created
April 18, 2011 09:11
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example: make a NoClassDefFoundError without a class name in the message
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[sajia@sajia ~]$ java | |
Usage: java [-options] class [args...] | |
(to execute a class) | |
or java [-options] -jar jarfile [args...] | |
(to execute a jar file) | |
where options include: | |
-d32 use a 32-bit data model if available | |
-d64 use a 64-bit data model if available | |
-server to select the "server" VM | |
The default VM is server. | |
-cp <class search path of directories and zip/jar files> | |
-classpath <class search path of directories and zip/jar files> | |
A : separated list of directories, JAR archives, | |
and ZIP archives to search for class files. | |
-D<name>=<value> | |
set a system property | |
-verbose[:class|gc|jni] | |
enable verbose output | |
-version print product version and exit | |
-version:<value> | |
require the specified version to run | |
-showversion print product version and continue | |
-jre-restrict-search | -jre-no-restrict-search | |
include/exclude user private JREs in the version search | |
-? -help print this help message | |
-X print help on non-standard options | |
-ea[:<packagename>...|:<classname>] | |
-enableassertions[:<packagename>...|:<classname>] | |
enable assertions | |
-da[:<packagename>...|:<classname>] | |
-disableassertions[:<packagename>...|:<classname>] | |
disable assertions | |
-esa | -enablesystemassertions | |
enable system assertions | |
-dsa | -disablesystemassertions | |
disable system assertions | |
-agentlib:<libname>[=<options>] | |
load native agent library <libname>, e.g. -agentlib:hprof | |
see also, -agentlib:jdwp=help and -agentlib:hprof=help | |
-agentpath:<pathname>[=<options>] | |
load native agent library by full pathname | |
-javaagent:<jarpath>[=<options>] | |
load Java programming language agent, see java.lang.instrument | |
-splash:<imagepath> | |
show splash screen with specified image | |
[sajia@sajia ~]$ java "" | |
Exception in thread "main" java.lang.NoClassDefFoundError: | |
Caused by: java.lang.ClassNotFoundException: | |
at java.net.URLClassLoader$1.run(URLClassLoader.java:202) | |
at java.security.AccessController.doPrivileged(Native Method) | |
at java.net.URLClassLoader.findClass(URLClassLoader.java:190) | |
at java.lang.ClassLoader.loadClass(ClassLoader.java:306) | |
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301) | |
at java.lang.ClassLoader.loadClass(ClassLoader.java:247) | |
Could not find the main class: . Program will exit. | |
[sajia@sajia ~]$ java '' | |
Exception in thread "main" java.lang.NoClassDefFoundError: | |
Caused by: java.lang.ClassNotFoundException: | |
at java.net.URLClassLoader$1.run(URLClassLoader.java:202) | |
at java.security.AccessController.doPrivileged(Native Method) | |
at java.net.URLClassLoader.findClass(URLClassLoader.java:190) | |
at java.lang.ClassLoader.loadClass(ClassLoader.java:306) | |
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301) | |
at java.lang.ClassLoader.loadClass(ClassLoader.java:247) | |
Could not find the main class: . Program will exit. |
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