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问题描述

我不能让javac识别外部.jar文件,我想要扩展的类。我有两个文件在同一个目录:TestConsole.java和acm.jar。我使用以下命令从同一目录进行编译:

I can't make javac recognize an external .jar file, whose classes I'm trying to extend. I have two files in the same directory: TestConsole.java and acm.jar. I'm compiling from the same directory using the following command:

javac -classpath。:acm.jar TestConsole.java

但看起来javac只是忽略acm.jar。它给我错误:

But it seems like javac is just ignoring acm.jar. It gives me the error:

TestConsole.java:1: package acm does not exist
import acm.program;
          ^

当然,acm.program是acm.jar中的一个包。 acm.jar中的所有类都已编译;我只是想在我的课程中使用它们,而不是编译它们。

Of course, acm.program is a package in acm.jar. All of the classes in acm.jar are already compiled; I just want to use them in my classes, not compile them.

我做错了什么?

我在Mac上运行这个,并且acm.jar的目录结构似乎是有效的:它包含一个 acm / program 目录,它有 ConsoleProgram.class TestConsole 扩展的唯一类。

I am running this on a Mac, and the directory structure of acm.jar appears to be valid: It contains an acm/program directory, which has ConsoleProgram.class, the only class that TestConsole extends.

javac -classpath:acm.jarTestConsole.java 不起作用。

推荐答案

检查清单:


  1. 您在acm.jar中的课程显示为:

    acm / program /CLASSX.class

    acm / program / CLASSY.class

  1. your classes in acm.jar appear as:

    acm/program/CLASSX.class

    acm/program/CLASSY.class

当使用jar tf acm.jar进行倾销时

when decanted with jar tf acm.jar

您正在导入它们:

import acm.program .CLASSX;


import acm.program。*;

import acm.program.CLASSX ;

or

import acm.program.* ;

这篇关于如何用.jar库编译Java程序的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!

10-18 15:37