RFR(XS) 6364329 jstat displays "invalid argument count" with usage

[Yuri Gaevsky]

Hello.

Please see below a small fix for integration into JDK 9:

$ hg diff
diff --git a/src/jdk.jcmd/share/classes/sun/tools/jstat/Arguments.java 
b/src/jdk.jcmd/share/classes/sun/tools/jstat/Arguments.java
--- a/src/jdk.jcmd/share/classes/sun/tools/jstat/Arguments.java
+++ b/src/jdk.jcmd/share/classes/sun/tools/jstat/Arguments.java
@@ -141,8 +141,9 @@
     public Arguments(String[] args) throws IllegalArgumentException {
         int argc = 0;
 
-        if (args.length < 1) {
-            throw new IllegalArgumentException("invalid argument count");
+        if (args.length == 0) {
+            help = true;
+            return;
         }
 
         if ((args[0].compareTo("-?") == 0)


Thanks,
-Yuri