Lazy Initialization Lazy Initialization is a technique where one postpones the instantiation of a object until its first use. In other words the instance of a class is created when its required to be used for the first time. The idea behind this is to avoid unnecessary instance creation. But there are concerns related to …
Archives for July 2012
Visiting all the files and directories for a directory in Java using NIO2
At times we might want to search for some file in a directory traversing recursively into other directories with in that directory, I know getting the recursive program right at the first time is always a challenge. Or we might want to list all the contents of a directory. For all these operations the NIO2 …
Listing and filtering directory content using Java NIO2
The Files class provides a method- newDirectoryStream to get the Directory contents for a give path instance. There are other overloaded versions of newDirectoryStream method which take in filters to apply on the directory content. also read: Java 7.0 Tutorials New Features in Java 7.0 G1 Garbage Collector in Java 7.0 Listing all files in …
Creating Hard links and Soft links for a file in Java
We have been exploring the NIO enhancements in Java 7 and in this post I will explain about creating links- Hard links and Soft links in Java. And this feature is part of Java 7. also read: Java 7.0 Tutorials New Features in Java 7.0 G1 Garbage Collector in Java 7.0 A link is kind …
Playing with Collections API in Scala
While I was going through the Scala collections API, I found the mere reading through the method and its functionality is not going to help. And I also realised that it will be useful if I can document them. And with that idea, I will try to document the APIs which I have tried. Please …
Obtaining and modifying the metadata of the files in Java 7 NIO.2
Files usually contain information like its creation time, last modified time, last accessed time, size, type, permissions, ownership and other details which constitute its metadata. NIO.2 enhancements in Java 7 adds views to obtain metadata information of the file. The file attributes are grouped into different views based on their relatedness and applicability, for example …
Exploring the Path API – Java NIO enhancement in Java 7
All of us know that an instance of File doesn’t indicate a file in the file system, unless some one invokes a create or related methods. But its a kind of confusion- you talk about instance of File and then you also talk about file at the disk level. A new class was introduced in …
Using Apply and Unapply Methods in Scala
Before we proceed to learn about Apply and Unapply methods, its good to know what a companion object is. A companion object in Scala for some class say Fraction is defined as: One can provide apply(args) and unapply(args) methods in the companion objects which can be used implemented to some special operations in Scala. Suppose …