Merge pull request #1063 from kishansagathiya/small_fix_3

Use isEmpty() to check for empty strings

Author: zilm13

ethereumj-core/src/main/java/org/ethereum/Start.java

@@ -37,7 +37,7 @@ public static void main(String args[]) throws IOException, URISyntaxException {
         CLIInterface.call(args);
 
         final SystemProperties config = SystemProperties.getDefault();
-        final boolean actionBlocksLoader = !config.blocksLoader().equals("");
+        final boolean actionBlocksLoader = !config.blocksLoader().isEmpty();
         final boolean actionGenerateDag = !StringUtils.isEmpty(System.getProperty("ethash.blockNumber"));
 
         if (actionBlocksLoader || actionGenerateDag) {