classpath

问题 As we know, new need to pack all needed class into the job-jar and upload it to server. it's so slow, i will to know whether there is a way which to specify the thirdpart jar include executing map-red job, so that i could only pack my classes with out dependencies. PS(i found there is a "-libjar" command, but i doesn't figure out how to use it. Here is the link http://blog.cloudera.com/blog/2011/01/how-to-include-third-party-libraries-in-your-map-reduce-job/) 回答1: Those are called generic

问题 I am developing a Plug-in for Lotus Notes (which is Eclipse 3.4) and need to rely on an external SDK/Connector for some Java dependencies and also Configuration files. It seems that in order to function properly, a file from the Connector installation folder has to be in the classpath. Since I don't know where it's installed, I have to rely on an environment variable that is set during installation ("IBMCMROOT"), which contains the folder. Is there any way to use Windows environment variables

问题 I have a simple Java program that prints out my classpath. Folder structure is as follows: [~/tmp/bin]# ls launcher/ PrintClasspath.class* And a copy of the same class one more level down in. [~/tmp/bin/launcher]# ls PrintClasspath.class* When I jump up to my ~/tmp directory and run PrintClasspath in my ~/tmp/bin directory, I can run the program just fine, stating ./bin as the classpath. [~/tmp]# java -cp "./bin" PrintClasspath /C:/Cygwin/home/user/tmp/bin/ Or I can run the same file I nested

问题 i am connecting oracle 10g xe with java but getting the exception java.lang.ClassNotFoundException: oracle.jdbc.driver.OracleDriver Even if i have included the classpath of driver i.e ojdbc14.jar if i have set wrong classpath please tell me the correct way to set the classpath 回答1: note that running a JAR (double-click ou "java -jar file.jar") does not use the CLASSPATH environment variable How Classes are Found In that case - running a JAR - you must set the Class-Path attribute in the

问题 My Java classes organization has gotten a little messy so I'm going over something I've skipped in my Java learning: the classpath. I can't quiet get beloved classes to compile in the packages I have created for them. Here's my folder hierarchy: . com/ david/ Greet.java greeter/ SayHello.java SayGoodbye.java Where SayHello's constructor just prints "hello" and SayGoodbye's prints "Goodbye" and Greet's main method just creates those two objects. At the top of SayHello is package com.david

问题 I have a typesafe configuration application.conf in the src/main/resources folder which is loaded by default. A single value can be overridden by specifying: --conf spark.driver.extraJavaOptions=-DsomeValue="foo" However, specifying a complete new, i.e. overriding application.conf file like: spark-submit \ --class my.Class \ --master "local[2]" \ --files foo.conf \ --conf spark.driver.extraClassPath="-Dconfig.file=file:foo.conf" \ --conf spark.driver.extraJavaOptions=-Dvalue="abcd" \ job.jar

问题 I'm new to Glassfish and Java EE although I've been using Java for a few years. I've inherited a project that stalled and now I need to start development on it again. I'm trying to deploy the web application as-is to see what works and what needs attention. While there is a lot of code to implement various functions, it appears that the first point needing attention is deployment of the application. The web application I'm trying to deploy is MyServer and is packaged in a WAR archive. A class

问题 This is my first project with Java. I'm using Ubuntu. I'm in the folder /home/anis/jtest/myProject and I run the Hello.java file with : javac src/org/example/Hello.java Seems that works. I get no error and a Hello.class file in the example directory. Then from the myProject firectory again I run : java -cp src/org/example Hello and I get the error : Exception in thread "main" java.lang.NoClassDefFoundError: Hello (wrong name: org/example/Hello) My code for Hello.java is : package org.example;

问题 This is my first project with Java. I'm using Ubuntu. I'm in the folder /home/anis/jtest/myProject and I run the Hello.java file with : javac src/org/example/Hello.java Seems that works. I get no error and a Hello.class file in the example directory. Then from the myProject firectory again I run : java -cp src/org/example Hello and I get the error : Exception in thread "main" java.lang.NoClassDefFoundError: Hello (wrong name: org/example/Hello) My code for Hello.java is : package org.example;

问题 My app only starts logging to log4j if I put a : on the end off the classpath. I already have the properties file and the jar in the classpath, so I'm not sure what's going on. What does ending the classpath with a colon even do? The startup command thus becomes something like this: java -cp path-to-log4j.properties:bunch:of:other:stuff: app If I take that last colon off it stops logging, as if it can't find log4j. My question is, what is that last colon actually doing, as in what directory