Update java version

Author: adangel

.travis.yml

@@ -1,7 +1,15 @@
 language: ruby
 before_install:
-- wget https://github.com/sormuras/bach/raw/master/install-jdk.sh
-- source ./install-jdk.sh -F 11 -L GPL -W $HOME/jdk
+- LOCAL_DIR=${HOME}/.cache/openjdk
+- TARGET_DIR=${HOME}/openjdk11
+- mkdir -p ${LOCAL_DIR}
+- DOWNLOAD_URL="https://pmd-code.org/openjdk/jdk-11.0.7%2B10/OpenJDK11U-jdk_x64_linux_hotspot_11.0.7_10.tar.gz"
+- OPENJDK_ARCHIVE=$(basename $DOWNLOAD_URL)
+- if [ ! -e ${LOCAL_DIR}/${OPENJDK_ARCHIVE} ]; then wget --directory-prefix ${LOCAL_DIR} --timestamping --continue ${DOWNLOAD_URL}; fi
+- tar --extract --file ${LOCAL_DIR}/${OPENJDK_ARCHIVE} -C ${TARGET_DIR} --strip-components=1
+- export JAVA_HOME="${TARGET_DIR}"
+- export PATH="${TARGET_DIR}/bin:${PATH}"
+- java -version
 script:
 - rake check_manifest
 - rake rubocop
@@ -27,5 +35,5 @@ deploy:
 cache:
   directories:
   - vendor/bundle
-  - "$HOME/jdk"
   - "$HOME/.rvm/"
+  - "$HOME/.cache/openjdk"