Using OR-Tools Maven for Java

 Introduction

This guide gets you started with OR-Tools in Java with a simple working example.

Although these instructions might also work on other Linux variants, we have only tested them on machines meeting the following requirements:

  • Alpine Edge 64-bit (x86_64)
  • Centos 7 LTS 64-bit (x86_64)
  • Debian SID 64-bit (x86_64)
  • Debian 11 (bullseye) 64-bit (x86_64)
  • Fedora 38 64-bit (x86_64)
  • Fedora 37 64-bit (x86_64)
  • OpenSuse Leap 64-bit (x86_64)
  • Ubuntu 23.10 64-bit (x86_64)
  • Ubuntu 22.04 LTS 64-bit (x86_64)
  • Ubuntu 20.04 LTS 64-bit (x86_64)

Prerequisites

The following sections describe the prerequisites for installing OR-Tools.

Java JDK >= 8.0

To install the Java JDK version 8.0 or higher, open a terminal window and enter:

Alpine

sudo apk add openjdk8
export JAVA_HOME=/usr/lib/jvm/java-1.8-openjdk

Centos

sudo yum install -y java-1.8.0-openjdk java-1.8.0-openjdk-devel

Debian

sudo apt install -y default-jdk
export JAVA_HOME=/usr/lib/jvm/default-java

Fedora

sudo dnf install -y java-openjdk java-openjdk-devel

Fedora

sudo dnf install -y java-openjdk java-openjdk-devel

OpenSUSE

sudo zypper install -y java-1_8_0-openjdk java-1_8_0-openjdk-devel

Ubuntu

sudo apt install -y default-jdk

Ubuntu

sudo apt install -y default-jdk

Ubuntu

sudo apt install -y default-jdk

Maven >= 3.3

To install Maven version 3.3 or higher, open a terminal window and enter:

Alpine

sudo apk add maven

Centos

sudo yum install -y maven

Debian

sudo apt install -y maven

Fedora

sudo dnf install -y maven

Fedora

sudo dnf install -y maven

OpenSUSE

sudo zypper install -y maven

Ubuntu

sudo apt install -y maven

Ubuntu

sudo apt install -y maven

Ubuntu

sudo apt install -y maven

You can test Maven is correctly installed and can find java using the following command: 

mvn -v

Installing with Maven

To include OR-Tools in your Maven application, add a dependency on its artifacts to your project's pom.xml file. For example,

<!-- https://mvnrepository.com/artifact/com.google.ortools/ortools-java -->
<dependency>
    <groupId>com.google.ortools</groupId>
    <artifactId>ortools-java</artifactId>
    <version>9.9.3963</version>
</dependency>

Get the Java example code

The example code is located in the java_or-tools repository.

  1. Download the repository as a zip file and extract it, or clone the repository:

    git clone -b v9.9 --depth 1 https://github.com/or-tools/java_or-tools

  2. Change to the examples directory:

    cd java_or-tools

Build the example

From the java_or-tools directory:

Build the project using:

mvn compile -B

Run the example

From the java_or-tools directory:

Run the binary using:

mvn exec:java

Congratulations! You've just run an application with OR-Tools, you are ready to get started with OR-Tools.