From d613d9c88866c719f5b1f39037b4d9f0acf3229a Mon Sep 17 00:00:00 2001
From: Chris Purcell <Chris.Purcell.39@gmail.com>
Date: Mon, 21 Nov 2016 15:11:43 +0000
Subject: [PATCH] Fix unreliable Travis builds

Attempting to enable Java 9 following the advice on
[issue 5520](https://github.com/travis-ci/travis-ci/issues/5520#issuecomment-175914595)
has resulted in the JDK 8 link that JAVA_HOME points to being intermittently deleted.
Alternative advice on
[issue 5897](https://github.com/travis-ci/travis-ci/issues/5897#issuecomment-211062030)
appears to be more reliable.
---
 .travis.yml | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/.travis.yml b/.travis.yml
index cdc99f782..24bae58ef 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,11 +1,14 @@
 # sudo/dist/group must be required/trusty/edge to access oraclejdk9 (2016-11-14)
 sudo: required
 dist: trusty
-group: edge
 
 language: java
-jdk:
-  - oraclejdk8
+
+addons:
+  apt:
+    packages:
+      - oracle-java8-installer
+      - oracle-java9-installer
 
 install: ./gradlew clean jar
 script: ./gradlew check