Month: May 2013

PS File Record Format :: Fixed block or Variable block?

PS File Record Format :: Fixed block or Variable block?

Most commonly used file formats for a PS file are Fixed Block (FB) & Variable Block (VB). At times when we are uncertain of the file format, we can easily deduce that using LISTDS command with IKJEFT01 utility in JCL. LISTDS will list all the attributes for e.g. Record Format,Record length etc.  of the dataset …

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IGYWCLG :: COBOL File handling in JCL SYSIN Card.

IGYWCLG :: COBOL File handling in JCL SYSIN Card.

In previous post we have seen how to execute a COBOL program (Add 2 numbers) in JCL Sysin Card. This post is concentrating more on how to accomplish a complex task for e.g. File handling using IGYWCLG. All we got to do is – write your COBOL program which handles certain files in COBOL.SYSIN. Only …

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Serialization and Constructor Invocations

Serialization and Constructor Invocations

Serialization and Constructor Invocations I heard some very strange things about serialization lately and decided to run some test to verify them. I first created a sample class that implements Serializable. The line 4 here, ensures that ‘SuperConstructor’ gets printed on my console whenever the constructor is invoked. The first weird thing, I was told …

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Google Keynote 2013 Android

Google Keynote 2013 Android

Google Keynote 2013 Android Three hours of  technical show of power and innovation. And I was literally awestruck.  And why not, Google has earned the bragging rights doing some amazing work. Google once again targeted on providing the flexibility and power to the developer. Google I/O Keynote 2013 featured most of the things Google has been …

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JavaEE CDI in one page

JavaEE CDI in one page

I’ve been reading and checking out the (javaee cdi) CDI- Context and Dependency Injection in JavaEE lately. The more I read, more I fall in love with it. I’ll try and make the article short and less painful for you. And will quickly brush over the important concepts covered in the CDI. Important Basic Features one …

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Change in Java version numbering scheme

Change in Java version numbering scheme

Heard of the change in Java version numbering scheme? Java has recently announced the change in the version numbering scheme. Here are a few highlights related to this news. What was the version numbering scheme before the change? Earlier the new versions used to be incremental. Have a look at this I stole from http://en.wikipedia.org/wiki/Java_version_history#Java_7_updates . …

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Intersection of Linked Lists

Intersection of Linked Lists

Continuing with the skitch experiment, here’s another attempt to explain spotting the intersection of Linked Lists with some cool images. Allow me to quickly introduce you to two good friends, Linked List 1 and Linked List 2. The linked list 1 is  (1 -> 2 -> 3 -> 4 -> 5 -> 6) having a …

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