Configured .travis.yml to build with JDK 8 and 11

- Configured to build with the minimum JDK and the latest stable JDK
- Building with both Oracle JDKs and Open JDKs

Author: emxsys

.travis.yml

@@ -4,14 +4,13 @@
 # Set up to run the Java build script per the Travis CI documentation
 language: java
 
-# Configure the build to using the minimum and the latest Oracle JDKs and Open JDKs
+# Configure the build to using the minimum and the latest stable Oracle JDKs and Open JDKs
+# Consider adding openjdk-ea and/or oraclejdk-ea to test early access JDKs
 jdk:
   - openjdk8
   - openjdk11
-  - openjdk-ea
   - oraclejdk8
   - oraclejdk11
-  - oraclejdk-ea
 
 # Install the Ant JUnit package, which is missing from the Travis CI environment. See the Travis documentation: https://docs.travis-ci.com/user/installing-dependencies/#Adding-APT-Packages
 addons: