How to add local .jar file dependency to build.gradle file?

Question

So I have tried to add my local .jar file dependency to my build.gradle file:

apply plugin: 'java'  sourceSets {     main {         java {             srcDir 'src/model'         }     } }  dependencies {     runtime files('libs/mnist-tools.jar', 'libs/gson-2.2.4.jar')     runtime fileTree(dir: 'libs', include: '*.jar') }  

And you can see that I added the .jar files into the referencedLibraries folder here: https://github.com/WalnutiQ/wAlnut/tree/version-2.3.1/referencedLibraries

But the problem is that when I run the command: gradle build on the command line I get the following error:

error: package com.google.gson does not exist import com.google.gson.Gson; 

Here is my entire repo: https://github.com/WalnutiQ/wAlnut/tree/version-2.3.1

Answer 1

According to the documentation, use a relative path for a local jar dependency as follows.

Groovy syntax:

dependencies {     implementation files('libs/something_local.jar') } 

Kotlin syntax:

dependencies {     implementation(files("libs/something_local.jar")) } 

Answer 2

If you really need to take that .jar from a local directory,

Add next to your module gradle (Not the app gradle file):

repositories {    flatDir {        dirs 'libs'    } }   dependencies {    implementation name: 'gson-2.2.4' } 

However, being a standard .jar in an actual maven repository, why don't you try this?

repositories {    mavenCentral() } dependencies {    implementation 'com.google.code.gson:gson:2.2.4' }