eclipse / android / java-无法从libs中的jar文件引用类

Question

OK, so I made a jar file, using the eclipse export feature, on one of my projects, let's call it X.

So X.jar has a single class in it, M.class.

I took this jar and put it into the libs/ folder of another project.

When I do

M m = new M()

it tells me it can't find M, and offers to import it from the package it's in. When I accept that import, it tells me the import cannot be found.

Now, what's confusing (or at least frustrating) is that if I export the jar with M.java instead of M.class, it works - but I need the jar to not be recompiled in the new project, hence why I was hoping to use the class file and not the source.

Answer 1

Instead of placing the jar file in the lib folder, try adding it to the build path.

In eclipse:

right click on the project -> Build Path -> Configure Build path... -> Add External JARS

In IntelliJ:

Ctrl+Alt+Shift+S -> Libraries -> new(Plus Sign)