diff --git a/task/build.rake b/task/build.rake
index 3186d95..261ffae 100644
--- a/task/build.rake
+++ b/task/build.rake
@@ -1,6 +1,16 @@
-desc 'Builds a new Gem and its checksum'
-task :signed_build => [:build] do
-  Rake::Task['checksum'].invoke
+namespace :build do
+  desc 'Builds a new Gem'
+  task :gem => [:build] do
+    Rake::Task['checksum'].invoke
+  end
+
+  desc 'Builds a new Java Gem'
+  task :java => [:clean] do
+    sh 'chruby-exec jruby -- rake build:gem'
+  end
+
+  desc 'Builds all Gems'
+  task :all => [:gem, :java]
 end
 
 task :build => [:generate]