build.gradle

apply plugin: 'java'

sourceCompatibility = 1.5
version = '1.0'

repositories {
    mavenCentral()
    jcenter()
    maven { url "https://jitpack.io" }
}

dependencies {
    compile 'com.github.tomp2p:TomP2P:9a68075'
}

Hello.java

import net.tomp2p.p2p.Peer;

public class Hello {

    public static void main(String... args) {
        Peer p = null;
    }

}

settings.gradle

rootProject.name = 'JitPackTesting'