“未解决的编译问题"；在Eclipse Indigo中运行MPJ Express的方法 [英] "Unresolved compilation problems" from running MPJ express in Eclipse Indigo

问题描述

我遵循了Utube的教程，内容涉及如何在IDE中使用MPJ Express运行并行应用.我下载了最新版本的MPJ Express，并使用了Eclipse Indigo.

I followed a tutorial from Utube on how to run parallel aplications using MPJ Express in an IDE. I downloaded the latest version of MPJ Express and used Eclipse Indigo.

我确实将MPI包含在我的项目JAR文件中.当我尝试编译一个简单的"hello程序"时，出现此错误:

I did include in my project JAR file for MPI. When I tried to compile a simple "hello program," I got this error:

由以下原因引起:java.lang.Error:未解决的编译问题:无法解析mpi.MPIException类型.从所需的.class文件间接引用

Caused by: java.lang.Error: Unresolved compilation problems: The type mpi.MPIException cannot be resolved. It is indirectly referenced from required .class files

我的代码是

import mpi.*;

public class HelloEclipsWorld {
    public static void main(String[] args) throws Exception {
        MPI.Init(args);
        int rank = MPI.COMM_WORLD.Rank();
        int size = MPI.COMM_WORLD.Size();
        System.out.println("I am process < " + rank + " > of total < " +
          size + " > processes.");
        MPI.Finalize();
    }
}

我在做什么错了?

推荐答案

这看起来像是类路径错误.根据您的编辑，看起来您正在使用Eclipse.右键单击项目时，选择Build Path > Configure Build Path...，然后转到库"(或定单和导出")选项卡，您应该看到mpj.jar.我猜它不会在那里了，您需要添加它.

This looks like a classpath error. Based on your edit, it looks like you're using Eclipse. When you right-click on your project, select Build Path > Configure Build Path... and then go to the "Libraries" (or "Order and Export") tab, you should see mpj.jar. I'm guessing it won't be there, and you'll need to add it.

这与您所说的mpi.jar不同.我只是使用您提供的代码和mpj.jar(从此处下载)建立了一个简单的测试项目. )，一切正常.

This is not the same as mpi.jar, which you said you have. I just set up a simple test project using the code you provided and mpj.jar (downloaded from here), and everything works.

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