Getting started

Jumper needs Java 21 or newer.

Try it from the command line

Download jmp.jar from Releases and write hello.jmp:

dyn name = "world";
println("Hello, " + name + "!");

Run it:

java -jar jmp.jar hello.jmp

Other ways to run code:

java -jar jmp.jar                      REPL: type code line by line
java -jar jmp.jar -e "println(6 * 7);"  one line of code
java -jar jmp.jar --check hello.jmp    report errors without running

Add it to a Java project

Jumper is published through JitPack. Tag is a release tag, e.g. v0.11.1.

Gradle (Kotlin)

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

dependencies {
    implementation("com.github.jumper-lang:jumper:Tag")
}

Gradle (Groovy)

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

dependencies {
    implementation 'com.github.jumper-lang:jumper:Tag'
}

Maven

<repositories>
    <repository>
        <id>jitpack.io</id>
        <url>https://jitpack.io</url>
    </repository>
</repositories>

<dependency>
    <groupId>com.github.jumper-lang</groupId>
    <artifactId>jumper</artifactId>
    <version>Tag</version>
</dependency>

Run a script from Java:

ScriptEngine jumper = new ScriptEngineManager().getEngineByName("jumper");
jumper.put("name", "world");
jumper.eval("println(\"Hello, \" + name);");

To pass your objects to scripts, call the functions they declare and restrict what they may do, see Embedding and Access policies.

Editors

• IntelliJ IDEA - plugin Jumper Language (jumper-intellij)
• VS Code - extension Jumper Language (jumper-vscode)
• Neovim - jumper.nvim

More in Tools.