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Tag Archives: Java 7

Type Inference from Java 7

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Every good programmer likes to write a concise but effective and optimized code. Type Inference is a way introduced in JDK 7 which will surely give you benefits of less typing. Its been a long time that you have using the java code in following manner. But have you ever thought of code duplication while initializing the specific implementation of ...

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Java 7: Closing NIO.2 file channels without loosing data

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Closing an asynchronous file channel can be very difficult. If you submitted I/O tasks to the asynchronous channel you want to be sure that the tasks are executed properly. This can actually be a tricky requirement on asynchronous channels for several reasons. The default channel group uses deamon threads as worker threads, which isn’t a good choice, cause these threads ...

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Java 7 #8: NIO.2 File Channels on the test bench

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Another blog post about new JDK 7 features. This time I am writing about the new AnsynchronousFileChannel class. I am analyzing the new JDK 7 features in depth for a couple of weeks now and I have decided to number my posts consecutively. Just to make sure I don’t get confused :-) Here is my 7th post about Java 7 ...

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Java 7’s Support for Suppressed Exceptions

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A new constructor and two new methods were added to the Throwable class (parent of Exception and Error classes) in JDK 7. The new constructor and two new methods were added to support “suppressed exceptions” (not to be confused with the bad practice of swallowing or ignoring exceptions). In this post, I look at why these methods were introduced and ...

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Java 7 – Project Coin Decompiled

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Hi all, it’s time to start writing in 2012. As you may have seen already in other blogs, there are a few changes that can make your developer life a lot easier when programming in Java: diamond operator, Strings in Switch, try with resources, multi catch, etc. In this post (PART I) we are going to see some of the ...

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Java: Improvements to the client and desktop parts of Java SE 6 and Java SE 7 !!!

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Client-Side Improvements in Java 6 and Java 7 Learn about the improvements to the client and desktop parts of Java SE 6 and Java SE 7, including the new applet plug-in, the Java Deployment Toolkit, shaped and translucent windows, heavyweight-lightweight mixing, and Java Web Start. Introduction Since the release of Java Platform, Standard Edition 6 (Java SE 6) in December ...

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Java 7: WatchService

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Of all the new features in Java 7, one of the more interesting is the WatchService, adding the capability to watch a directory for changes. The WatchService maps directly to the native file event notification mechanism, if available. If a native event notification mechanism is not available, then the default implementation will use polling. As a result, the responsiveness, ordering ...

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Java 7: A complete invokedynamic example

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Another blog entry in my current Java 7 series. This time it’s dealing with invokedynamic, a new bytecode instruction on the JVM for method invocation. The invokedynamic instruction allows dynamic linkage between a call site and the receiver of the call. That means you can link the class that is performing a method call to the class (and method) that ...

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Java 7: Copy and Move Files and Directories

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This post is a continuation of my series on the Java 7 java.nio.file package, this time covering the copying and moving of files and complete directory trees. If you have ever been frustrated by Java’s lack of copy and move methods, then read on, for relief is at hand. Included in the coverage is the very useful Files.walkFileTree method. Before ...

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Java 7: How to write really fast Java code

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When I first wrote this blog my intention was to introduce you to a class ThreadLocalRandom which is new in Java 7 to generate random numbers. I have analyzed the performance of ThreadLocalRandom in a series of micro-benchmarks to find out how it performs in a single threaded environment. The results were relatively surprising: although the code is very similar, ...

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