jvm: Call JVM methods from Haskell.

Versions [RSS]	0.1, 0.1.1, 0.1.2, 0.2.0, 0.2.1, 0.2.2, 0.3.0, 0.4.0, 0.4.0.1, 0.4.1, 0.4.2, 0.5.0, 0.6.0 (info)
Dependencies	base (>=4.14 && <5), bytestring (>=0.10), choice (>=0.1), constraints (>=0.8), distributed-closure (>=0.3), exceptions (>=0.8), jni (>=0.7.0 && <0.8), linear-base (==0.1.0.0), singletons (>=2.6), template-haskell, text (>=1.2), vector (>=0.11) [details]
License	BSD-3-Clause
Copyright	2015-2016 EURL Tweag.
Author	Tweag I/O
Maintainer	m@tweag.io
Category	FFI, JVM, Java
Home page	http://github.com/tweag/inline-java/tree/master/jvm#readme
Source repo	head: git clone https://github.com/tweag/inline-java(jvm)
Uploaded	by FacundoDominguez at 2020-07-16T18:46:17Z
Distributions
Reverse Dependencies	4 direct, 1 indirect [details]
Downloads	7006 total (37 in the last 30 days)
Rating	(no votes yet) [estimated by Bayesian average]
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Status	Docs uploaded by user [build log] All reported builds failed as of 2020-07-16 [all 1 reports]

Readme for jvm-0.5.0

[back to package description]

jvm: Call any JVM function from Haskell

This package enables calling any JVM function from Haskell. If you'd like to call JVM methods using Java syntax and hence get the Java compiler to scope check and type check all your foreign calls, see inline-java, which builds on top of this package.

Example

Graphical Hello World using Java Swing:

{-# LANGUAGE DataKinds #-}
{-# LANGUAGE GeneralizedNewtypeDeriving #-}
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE UndecidableInstances #-}

import Data.Text (Text)
import Language.Java

newtype JOptionPane = JOptionPane (J ('Class "javax.swing.JOptionPane"))
  deriving Coercible

main :: IO ()
main = withJVM [] $ do
    message <- reflect ("Hello World!" :: Text)
    callStatic
      (classOf (undefined :: JOptionPane))
      "showMessageDialog"
      nullComponent
      (upcast message)
  where
    nullComponent :: J ('Class "java.awt.Component")
    nullComponent = jnull