diff --git a/gen b/gen
new file mode 100755
index 0000000..49bcae8
--- /dev/null
+++ b/gen
@@ -0,0 +1,23 @@
+#!/bin/bash
+
+set -eux
+
+make CXX=g++-8 capnpc-java 
+
+capnp compile -I./compiler/src/main/schema/ -o/bin/cat ./runtime/src/test/schema/test.capnp > ./runtime/src/test/schema/test.raw
+capnp compile -I./compiler/src/main/schema/ -oc++ ./runtime/src/test/schema/test.capnp
+capnp compile -I./compiler/src/main/schema/ -o./capnpc-java ./runtime/src/test/schema/test.capnp
+cp ./runtime/src/test/schema/Test.java ./runtime/src/test/java/org/capnproto/test/
+
+capnp compile -I./compiler/src/main/schema/ -oc++ ./runtime/src/test/schema/demo.capnp
+capnp compile -I./compiler/src/main/schema/ -o./capnpc-java ./runtime/src/test/schema/demo.capnp
+cp ./runtime/src/test/schema/Demo.java ./runtime/src/test/java/org/capnproto/demo/
+
+capnp compile -I./compiler/src/main/schema/ -o/bin/cat ./runtime/src/test/schema/generics.capnp > ./runtime/src/test/schema/generics.raw
+capnp compile -I./compiler/src/main/schema/ -oc++ ./runtime/src/test/schema/generics.capnp
+capnp compile -I./compiler/src/main/schema/ -o./capnpc-java ./runtime/src/test/schema/generics.capnp
+cp ./runtime/src/test/schema/TestGenerics.java ./runtime/src/test/java/org/capnproto/demo/
+
+capnp compile -I./compiler/src/main/schema/ -o./capnpc-java ./examples/src/main/schema/addressbook.capnp
+cp ./examples/src/main/schema/Addressbook.java ./examples/src/main/java/org/capnproto/examples/
+