travis upd

.travis.yml

@@ -1,8 +1,12 @@
 language: java
-
 sudo: required
 
-jdk: oraclejdk8
+jdk: oraclejdk9
+
+addons:
+  apt:
+    packages:
+      - oracle-java9-installer
 
 install:
   - curl -OL https://raw.githubusercontent.com/metacran/r-builder/master/pkg-build.sh
@@ -11,7 +15,9 @@ install:
   - export PATH="$PATH:`./pkg-build.sh r_path`"
 
 script:
+  - jdk_switcher use oraclejdk8
   - mvn clean install -Dmaven.javadoc.skip=true -q
+  - jdk_switcher use oraclejdk9
   - java -jar target/vdjtools-*.jar RInstall
   - wget https://github.com/mikessh/vdjtools-examples/releases/download/1.1/aging_lite.zip
   - unzip aging_lite.zip