improve ci

- add jdk 11 for appveyor ci
- exclude branch appveyor for travis ci

.travis.yml

@@ -15,6 +15,10 @@ addons:
 jdk:
   - oraclejdk8
 
+branches:
+  except:
+    - appveyor
+
 before_install:
   # workaroud for "buffer overflow detected" problem of openjdk:
   #     https://github.com/travis-ci/travis-ci/issues/5227

appveyor.yml

@@ -12,6 +12,7 @@ environment:
     - JAVA_HOME: "C:\\Program Files\\Java\\jdk1.8.0"
     - JAVA_HOME: "C:\\Program Files\\Java\\jdk9"
     - JAVA_HOME: "C:\\Program Files\\Java\\jdk10"
+    - JAVA_HOME: "C:\\Program Files\\Java\\jdk11"
 
 init:
   - ps: "ls 'C:/Program Files/Java/jdk*'"