Add a Java 9 regression build.

.travis-command-jdk9.sh

@@ -0,0 +1,50 @@
+#!/bin/bash
+
+set -euo pipefail
+
+# Prevent accidental execution outside of Travis:
+if [ -z "${TRAVIS+false}" ]
+then
+  echo "TRAVIS environment variable is not set"
+  exit 1
+fi
+
+# Switch to desired JDK, download if required:
+function install_jdk {
+  JDK_URL="http://download.java.net/java/jdk9/archive/178/binaries/jdk-9+178_linux-x64_bin.tar.gz"
+
+  FILENAME="jre-9+178_linux-x64_bin.tar.gz"
+
+  rm -rf /tmp/jdk/$JDK
+  mkdir -p /tmp/jdk/$JDK
+
+  if [ ! -f "/tmp/jdk/$FILENAME" ]
+  then
+    curl -L $JDK_URL -o /tmp/jdk/$FILENAME
+  fi
+
+  echo "Extracting archive"
+  tar -xzf /tmp/jdk/$FILENAME -C /tmp/jdk/$JDK --strip-components 1
+  echo "Completed extracting archive"
+
+  if [ -z "${2+false}" ]
+  then
+    export JAVA_HOME="/tmp/jdk/$JDK"
+    export JDK_HOME="${JAVA_HOME}"
+    export JAVAC="${JAVA_HOME}/bin/javac"
+    export PATH="${JAVA_HOME}/bin:${PATH}"
+  fi
+  $JAVA_HOME/bin/java -version
+  echo "Completed setting environment"
+}
+
+source $HOME/.jdk_switcher_rc
+case "$JDK" in
+Java8)
+  echo "Java 8 build already executed!"
+  ;;
+Java9)
+  install_jdk
+  ;;
+esac
+

.travis.yml

@@ -22,29 +22,41 @@ matrix:
       env:
         - DESC="acceptance tests"
         - CMD="mvn install --projects acceptance-tests --also-make --activate-profiles all --batch-mode --show-version --errors"
+        - JDK=Java8
 
     - jdk: oraclejdk8
       env:
         - DESC="findbugs"
         - CMD="mvn install findbugs:check --projects '!scala-unit-tests,!jmh-scala-tests,!jmh-tests,!p2-repository' --activate-profiles all -DskipTests=true --batch-mode --show-version --errors"
+        - JDK=Java8
 
     - jdk: oraclejdk8
       env:
         - DESC="checkstyle"
         - CMD="mvn install checkstyle:check --activate-profiles all -DskipTests=true --batch-mode --show-version --errors"
+        - JDK=Java8
 
     - jdk: oraclejdk8
       env:
         - DESC="unit tests"
         - CMD="mvn install --batch-mode --show-version --errors"
         - SONAR_COMMAND="sonar:sonar -Dsonar.host.url=https://sonarqube.com -Dsonar.login=${SONARQUBE_TOKEN} -Dsonar.organization=eclipse-collections"
+        - JDK=Java8
 
     - jdk: oraclejdk8
       env:
         - DESC="compile jmh-tests and performance-tests"
         - CMD="mvn install --projects jmh-tests,performance-tests --also-make --activate-profiles all -DskipTests=true --batch-mode --show-version --errors"
+        - JDK=Java8
+
+    - jdk: oraclejdk8
+      env:
+        - DESC="Java 9 regression"
+        - JDK=Java9
+        - CMD="mvn install --batch-mode --show-version --errors -Dbytecode.version=1.9 -DargLine=-Djava.locale.providers=JRE,SPI"
 
 script:
+  - ./.travis-command-jdk9.sh
   - if [[ "$TRAVIS_EVENT_TYPE" == "cron" ]];
     then eval travis_wait 35 $CMD $SONAR_COMMAND;
     else eval travis_wait 35 $CMD;