Apache Hadoop is an open source framework for storing data and processing of data set of big data on a cluster of nodes (commodity hardware) in parallel. Hadoop framework is designed to scale up from single server to thousand of machines with each machine offering both storage and computation. It…
Java 7 onward a new feature try-with-resources is available for automatic resource management. With this feature, try-with-resources in Java, one or more resources are declared with the try statement itself. The try-with-resources statement ensures that the declared resources are closed automatically at the end. Here resource is an object that…
In this post we’ll see a new feature Multi-Catch exception added in Java 7. Using Multi-catch statement single catch block can handle more than one type of exception. You don’t need to write multiple catch blocks to catch different exceptions where exception handling code is similar. Table of contents Prior…
In the execution of the method code, if an exception condition occurs, normal flow of the method is disrupted. In order to handle the exceptional condition an exception object is created and thrown. That exception may be handled in the method where that exception is thrown or it may be…
Code in your method may throw exceptions that your method doesn’t handle. In that case you need to specify those exceptions along with the method declaration. That way calling method can provide exception handling mechanism for those exceptions. To specify the exceptions in your method declaration you can use throws…
Java 8 onward a new feature has been added to the interface in Java known as default method in Java interface. With the inclusion of default methods, an interface in Java can have a default implementation for a method. Note that in a normal traditional form of interface all the…
In this post we’ll see how to make a file or folder hidden in Java and also how to unhide a file in Java. Setting the attribute for making a file hidden is OS specific and there is no uniform way to do it across platforms using Java. Hiding a…
This post shows how to rename a file using a Java program. The options you have in Java for renaming a file are as given below- renameTo(File dest)– You can use renameTo() method of the java.io.File class. See example. Files.move()– Java 7 onward you can also use Files.move() method to…
This post shows how to delete a file or directory using a Java program and how to delete a directory recursively. For deleting a file or directory, Java provides following options. delete()– You can use the delete method of java.io.File class. This method deletes the file or directory denoted by…
This post shows how to copy a directory in Java where all the files and sub folders with in a directory are recursively copied to a new directory. Options for copying a directory in Java For copying the folder tree structure which includes the sub-directories and all the files you…