fixed Java version check in bash template

src/main/resources/com/typesafe/sbt/packager/archetypes/scripts/bash-template

@@ -276,16 +276,22 @@ java_version_check() {
     echo Please go to http://www.java.com/getjava/ and download
     echo
     exit 1
-  elif [[ ! "$java_version" > "1.6" ]]; then
-    echo
-    echo The java installation you have is not up to date
-    echo $app_name requires at least version 1.6+, you have
-    echo version $java_version
-    echo
-    echo Please go to http://www.java.com/getjava/ and download
-    echo a valid Java Runtime and install before running $app_name.
-    echo
-    exit 1
+  else
+    local major=$(echo "$java_version" | cut -d'.' -f1)
+    if [[ "$major" -eq "1" ]]; then
+     local major=$(echo "$java_version" | cut -d'.' -f2)
+    fi
+    if [[ "$major" -lt "6" ]]; then
+      echo
+      echo The java installation you have is not up to date
+      echo $app_name requires at least version 1.6+, you have
+      echo version $java_version
+      echo
+      echo Please go to http://www.java.com/getjava/ and download
+      echo a valid Java Runtime and install before running $app_name.
+      echo
+      exit 1
+    fi
   fi
 }
 

src/sbt-test/docker/jdk-versions/build.sbt

@@ -0,0 +1,31 @@
+val basename = "jdk-versions"
+
+scalacOptions in ThisBuild := Seq("-target:jvm-1.8")
+
+lazy val `jdk8` = project
+  .in(file("jdk8"))
+  .enablePlugins(JavaAppPackaging)
+  .settings(
+    name := basename + "-8",
+    dockerBaseImage := "openjdk:8u162-jre",
+    dockerBuildOptions := dockerBuildOptions.value ++ Seq("-t", "jdk-versions:8")
+  )
+
+lazy val `jdk9` = project
+  .in(file("jdk9"))
+  .enablePlugins(JavaAppPackaging)
+  .settings(
+    name := basename + "-9",
+    dockerBaseImage := "openjdk:9.0.4-jre",
+    dockerBuildOptions := dockerBuildOptions.value ++ Seq("-t", "jdk-versions:9")
+  )
+
+lazy val `jdk10` = project
+  .in(file("jdk10"))
+  .enablePlugins(JavaAppPackaging)
+  .settings(
+    name := basename + "-10",
+    dockerBaseImage := "openjdk:10-jre",
+    dockerBuildOptions := dockerBuildOptions.value ++ Seq("-t", "jdk-versions:10")
+  )
+

src/sbt-test/docker/jdk-versions/jdk10/src/main/scala/Hello.scala

@@ -0,0 +1,3 @@
+object Hello extends App {
+  println("Hello JDK10!")
+}

src/sbt-test/docker/jdk-versions/jdk8/src/main/scala/Hello.scala

@@ -0,0 +1,3 @@
+object Hello extends App {
+  println("Hello JDK8!")
+}

src/sbt-test/docker/jdk-versions/jdk9/src/main/scala/Hello.scala

@@ -0,0 +1,3 @@
+object Hello extends App {
+  println("Hello JDK9!")
+}

src/sbt-test/docker/jdk-versions/project/plugins.sbt

@@ -0,0 +1,2 @@
+addSbtPlugin("com.typesafe.sbt" % "sbt-native-packager" % sys.props("project.version"))
+

src/sbt-test/docker/jdk-versions/test

@@ -0,0 +1,9 @@
+> project jdk8
+> docker:publishLocal
+$ exec bash -c 'docker run --rm jdk-versions:8 | grep -q "Hello JDK8!"'
+> project jdk9
+> docker:publishLocal
+$ exec bash -c 'docker run --rm jdk-versions:9 | grep -q "Hello JDK9!"'
+> project jdk10
+> docker:publishLocal
+$ exec bash -c 'docker run --rm jdk-versions:10 | grep -q "Hello JDK10!"'