Skip to main content

New in Dolphin - Java 7


With Dolphin java introduced cool new features like:

1. Strings in “switch” block

     switch(s) {
          case “Apple”:
          // do something;

          case “Orange”:
          // do something;


          default :
     }



     2. <> (Diamond) operator – Type inference for generic instance creation
E.g List > list = new ArrayList>();
vis-à-vis
List > list = new ArrayList <> ();
Empty diamond braces is required and it's not a typo :).



     3. Single Catch for multiple Exceptions with "|" operator
          try {
          // Reflective operations calling Class.forName,
          // Class.newInstance, Class.getMethod, Method.invoke, etc.
     } catch (final ClassNotFoundException |      InstantiationException | NoSuchMethodException |      InvocationTargetException e) {
          log(e)
          throw e;
     }


     4. Also in Java 7, this will work
     public void rethrowException(String exceptionName) throws FirstException, SecondException {
          try { // ...
          } catch (Exception e) {
          throw e;
     }
}



     5. Try-with-resources statement – basic objective is to facilitate automatic resource management, simplify coding and highlight pertinent exceptions e.g.
     try (InputStream in = new FileInputStream(src);
     OutputStream out = new FileOutputStream(dest);) {
          byte buf = new byte[8192];
          int n;
          while ((n = in.read(buf)) >= 0)
               out.write(buf, 0, n);
          }

Comments

  1. Oh these are nice - certainly will take care of much of the boiler plate code that one has to write for many of these exceedingly common situations! Thanks - was useful.

    ReplyDelete
  2. Thanks Sachin, I agree try block looks much better now...

    ReplyDelete
  3. Nice to see this blog Subodh, My name is also Subodh Gupta :D

    ReplyDelete

Post a Comment

Popular posts from this blog

Master Detail

Master-Detail Eclipse Forms I just finished working on the editor which uses the Master-Detail pattern of the eclipse forms. During which I faced several problems like: In my master block, when the size of table-viewer increased, the master block shows the scrollbar instead of table-viewer. Also, it made the length of the detail and master parts equal which made my editor unusable Detail part having scroll problems like the one mentioned above Setting the details part data-dynamically was yet another area where I faced a lot of problem In this blog, I will be giving a brief introduction about the master-detail pattern and will be addressing the problems mentioned above. The article by Dejan Glozic is really helpful and explains the basics of the eclipse forms. I’ll be explaining the stuff using FUSE Integration Designer(FID) which is an open source and available for download . And the screen-shots will be from the Messaging module of the FID using the example of JMS Messages . In

Interview at Progress Software

I have given a lot of interviews before however, this one was special. Let me start from the beginning. I got a call from Progress Software and was scheduled for the first telephonic discussion. Next day, I got a call from HR and she asked me questions on Java and a few basic puzzles.  After clearing the previous round, I got scheduled for the second telephonic interview. This interview covered Java, design-related problems and algorithms. After a week, I got a call from the HR for the onsite interviews in Hyderabad. This is the first time I googled about Progress Software. I said yes for the onsite interviews. Journey to onsite started not as planned after my flight got delayed. Because of fog-related delay in Delhi, I reached the PSI (Progress Software India) office couple of hours late.  HR introduced me to the first interviewer. The interviewer explained the first round. It was a coding round (I am not a big fan of coding rounds), the problem was well expl

java.net.SocketException: Connection reset

I am able to fix the problem via setting the following params on the HTTPClient class... client.getParams().setParameter("http.socket.timeout", new Integer(0)); client.getParams().setParameter("http.connection.stalecheck", new Boolean(true)); java.net.SocketException: Connection reset at java.net.SocketInputStream.read(Unknown Source) at java.io.BufferedInputStream.fill(Unknown Source) at java.io.BufferedInputStream.read(Unknown Source) at org.apache.commons.httpclient.HttpParser.readRawLine(HttpParser.java:77) at org.apache.commons.httpclient.HttpParser.readLine(HttpParser.java:105) at org.apache.commons.httpclient.HttpConnection.readLine(HttpConnection.java:1115) at org.apache.commons.httpclient.HttpMethodBase.readStatusLine(HttpMethodBase.java:1832) at org.apache.commons.httpclient.HttpMethodBase.readResponse(HttpMethodBase.java:1590) at org.apache.commons.httpclient.HttpMethodBase.execute(