src/jdk.jcmd/share/classes/sun/tools/jinfo/JInfo.java

rev 47855 : 8189102: All tools should support -?, -h and --help

@@ -1,7 +1,7 @@
 /*
- * Copyright (c) 2006, 2014, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2006, 2017, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.  Oracle designates this

@@ -61,11 +61,12 @@
                 break;
             }
 
             optionCount++;
 
-            if (arg.equals("-help") || arg.equals("-h")) {
+            // -help: legacy. Undocumented.
+            if (arg.equals("-?") || arg.equals("-h") || arg.equals("--help") || arg.equals("-help")) {
                 usage(0);
             }
 
             if (arg.equals("-flag")) {
                 doFlag = true;

@@ -253,9 +254,9 @@
         System.err.println("    -flag [+|-]<name>    to enable or disable the named VM flag");
         System.err.println("    -flag <name>=<value> to set the named VM flag to the given value");
         System.err.println("    -flags               to print VM flags");
         System.err.println("    -sysprops            to print Java system properties");
         System.err.println("    <no option>          to print both VM flags and system properties");
-        System.err.println("    -h | -help           to print this help message");
+        System.err.println("    -? | -h | --help     to print this help message");
         System.exit(exit);
     }
 }