restore help message

Author: pan3793

parquet-cli/README.md

@@ -128,8 +128,8 @@ Usage: parquet [options] [command] [command options]
 
   Examples:
 
-    # print information for version
-    parquet help version
+    # print information for meta
+    parquet help meta
 
   See 'parquet help <command>' for more information on a specific command.
 ```

parquet-cli/src/main/java/org/apache/parquet/cli/Help.java

@@ -25,6 +25,7 @@
 import com.beust.jcommander.ParameterDescription;
 import com.beust.jcommander.Parameters;
 import com.google.common.collect.Lists;
+import java.util.Arrays;
 import java.util.List;
 import org.slf4j.Logger;
 
@@ -116,7 +117,7 @@ public void printGenericHelp() {
     }
 
     jc.getCommands().keySet().stream()
-        .filter(s -> !s.equals("help"))
+        .filter(s -> !Arrays.asList("version", "help").contains(s))
         .findFirst()
         .ifPresent(command -> {
           console.info("\n  Examples:");