classpath

In java program, When I try to compile some code it creates an error I get this message: Picked up _JAVA_OPTIONS: -Xmx512M what type of error is this the page Suppressing the "Picked up _JAVA_OPTIONS" message cannot solve problem ,how to change system variable in windows 7 ?? SUBHASIS MONDAL Go to my computer and right click on top of that and click on properties, a new window will open like below. then click on advanced system setting then click on environment variable and delete _JAVA_OPTIONS from user variable and then try again. Part of my original answer was truncated, so here is the

一、背景 几个Web项目需要打包到一个发布包中，问题是War包都各自包含了自己的WEB-INF/lib，其中不少依赖Jar有重复。所以希望把War包的所有的lib都放到外部的一个公共目录减小总工程大小。但放在一个目录，以目录方式加载到全局Classpath就会产生类库冲突问题，如：web1使用spring2，web2使用spring3。 二、分析 一般Jar包中都包含一个META-INF/MANIFEST.MF文件。在这个配置文件中可以指定一个Class-Path属性，再执行java -jar xxx.jar时，Java会以这个Class-Path属性中定义为准。 War包中也有MANIFEST.MF文件，当然也可以添加Class-Path属性（Maven）。但问题是这个属性从Java规范上讲并没有约定，所以应用服务器一般都不识别。 我们需要解决的是类路径加载的问题。还好Tomcat上下文配置文件的Context标签中有Loader标签，允许我们重写WebappLoader。 三、开发 1、Tomcat应用上下文XML配置样例 在Tomcat应用上下文配置文件中，定义Web工程的Loader指定到自定义WebappLoader。 <?xml version="1.0" encoding="UTF-8"?> <Context docBase="${xxx.home}/apps/xxx

I am getting java.lang.NoClassDefFoundError: org/apache/commons/digester/Digester error and I am stuck with this error for more than a month. I have tried all Digester versions available and I also checked for duplicate JARs in classpath. I have designed the report through iReport-5.6.0 and I used the JARs from the iReport-5.6.0\ireport\modules\ext and other required JARs. Error-Log: Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/commons/digester/Digester at net.sf.jasperreports.engine.JasperCompileManager.compileReportToFile(JasperCompileManager.java:108) at net.sf

I put rxtxcomm.jar into jre/lib/ext folder, but I still get NoClassDefFoundError Isn't this folder automatically taken into the global classpath? Thanks yes it is taken automatically to classpath, but RXTXcomm uses JNI /native external libraries (.so and .dll files), you must provide the path to them when running your program in command line: java -jar yourprogram.jar -Djava.library.path="PATH_TO_EXTERNAL_LIBRARIES" for linux: suppose you unpacked the rxtx.zip to /home/user/ if you have 32bit x86 platofrm: PATH_TO_EXTERNAL_LIBRARIES = /home/user/Linux/i686-unknown-linux-gnu/ if you have 64bit

CLASSPATH has the "/Users/smcho/Desktop/clojure" as one of its path, and this directory has the file hello.clj. Running clojure, and running (require 'hello) give this error message. java.io.FileNotFoundException: Could not locate hello__init.class or hello.clj on classpath: (NO_SOURCE_FILE:0) When I change directory to "/Users/.../clojure", and run the same (require 'hello), there's no problem. The . is on the CLASSPATH. Running java -cp /Users/smcho/bin/jar/clojure.jar:/Users/smcho/Desktop/clojure clojure.lang.Repl also works. Why clojure can't find the source on the CLASSPATH? Like Alex

I tried to run the following command on the command-line: G:\Weka-3-6>java weka.core.converters.CSVLoader data.csv > data.arff This is the error message: ---Registering Weka Editors--- Trying to add database driver (JDBC): RmiJdbc.RJDriver - Error, not in CLASSPATH? Trying to add database driver (JDBC): jdbc.idbDriver - Error, not in CLASSPATH? Trying to add database driver (JDBC): org.gjt.mm.mysql.Driver - Error, not in CLASSPATH? Trying to add database driver (JDBC): com.mckoi.JDBCDriver - Error, not in CLASSPATH? Trying to add database driver (JDBC): org.hsqldb.jdbcDriver - Error, not in