在Linux上使用类路径运行Javac Command

Question

I have a folder Called TutorialFolder. Inside this, i have tutorial_class folder and WordCount.java file. When I run wordcount program, it is giving below error.

hduser@ubuntu:~/Desktop/TutorialFolder$ javac -classpath ${HADOOP_CLASSPATH}-d '/home/hduser/Desktop/TutorialFolder/tutorial_class' '/home/hduser/Desktop/TutorialFolder/WordCount.java' 
javac: invalid flag: /home/hduser/Desktop/TutorialFolder/tutorial_class
Usage: javac <options> <source files>
use -help for a list of possible options

Answer 1

The problem here is with the variable ${HADOOP_CLASSPATH} which is not set or empty. Thus the command is interpreted as,

javac -classpath  -d /home/hduser/Desktop/TutorialFolder/tutorial_class /home/hduser/Desktop/TutorialFolder/WordCount.java 

Fix the $HADOOP_CLASSPATH variable, the command should work.

Or, Try with hadoop classpath command

javac -classpath `hadoop classpath` -d /home/hduser/Desktop/TutorialFolder/tutorial_class /home/hduser/Desktop/TutorialFolder/WordCount.java