add setup-java

Author: Vladimir Kotal

.github/workflows/build.yml

@@ -4,10 +4,14 @@ on: push
 
 jobs:
   build:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-latest with Java 11
     steps:
     - name: Checkout master branch
       uses: actions/checkout@v2
+    - name: Set up JDK 11
+      uses: actions/setup-java@v1
+      with:
+        java-version: 11
     - name: Install pre-requisites
       run: ./dev/before_install
     - name: Before build actions