.travis.yml: build matrix for (scala 2.11, 2.12) x (oraclejdk, openjdk) x (jdk 7, 8)

Author: giabao

.travis.yml

@@ -1,6 +1,20 @@
+sudo: required
+dist: trusty
 language: scala
 scala:
    - 2.11.8
-jdk:
-  - oraclejdk8
-  - oraclejdk7
+   - 2.12.0-M4
+env:
+- JDK=oraclejdk8
+- JDK=openjdk8
+- JDK=oraclejdk7
+- JDK=openjdk7
+before_script:
+- jdk_switcher use $JDK
+matrix:
+  # scala 2.12 require java 8
+  exclude:
+    - scala: 2.12.0-M4
+      env: JDK=oraclejdk7
+    - scala: 2.12.0-M4
+      env: JDK=openjdk7