编译hadoop java文件 [英] Compiling hadoop java files

问题描述

我需要编译Java Hadoop程序。

我编译并获取了mapper和reducer的.class文件。

但是当我编译mainjava文件时，我一直收到这个错误。

，它不能指向mapper和reducer类文件。

我该如何解决这个问题？

解决方案

您必须将所有源文件都提供给javac

<例子：

  javac -classpath /usr/local/hadoop/hadoop-core-1.0.4.jar -sourcepath src / -d build / MyMain.java MyMapper.java MyReducer.java 
  

I need to compile Java Hadoop programs.

I have compiled and got .class files for mapper and reducer.

But when I compile mainjava file, i keep getting this error.

that is it can't point mapper and reducer class files.

How can I resolve this issue?

解决方案

You have to give all of your source files to javac

Example:

 javac -classpath /usr/local/hadoop/hadoop-core-1.0.4.jar -sourcepath src/ -d build/ MyMain.java MyMapper.java MyReducer.java

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