[PATCH] check-java-version for Java9

[Ahmed Ashour]

Hi all,


The current build checks for Java 8 in check-java-version target, 
however this should be for Java 9.

So the user gets the message:

     check-java-version:

     BUILD FAILED
     C:\nashorn\make\build.xml:137: Unsupported Java version: 1.8. 
Please use Java version 1.9 or greater.


Instead of:

     compile:
         [javac] Compiling 1 source file to 
C:\nashorn\build\classes\jdk.dynalink
         [javac] javac: invalid target release: 1.9
         [javac] Usage: javac <options> <source files>
         [javac] use -help for a list of possible options

     BUILD FAILED
     C:\nashorn\make\build.xml:179: Compile failed; see the compiler 
error output for details.


Thanks a lot,

Ahmed


diff --git a/make/build.xml b/make/build.xml
--- a/make/build.xml
+++ b/make/build.xml
@@ -129,12 +129,12 @@
    </target>

    <target name="check-java-version">
-    <!-- look for a Class that is available only in jdk1.8 or above -->
+    <!-- look for a Class that is available only in jdk1.9 or above -->
      <!-- core/exposed API class is better than an implementation class -->
-    <available property="jdk1.8+" classname="java.util.stream.Stream"/>
+    <available property="jdk1.9+" classname="java.lang.ProcessHandle"/>

-    <!-- need jdk1.8 or above -->
-    <fail message="Unsupported Java version: ${ant.java.version}. 
Please use Java version 1.8 or greater." unless="jdk1.8+">
+    <!-- need jdk1.9 or above -->
+    <fail message="Unsupported Java version: ${ant.java.version}. 
Please use Java version 1.9 or greater." unless="jdk1.9+">
      </fail>
    </target>