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Tag Archives: Java 8

Java 8 Friday: The Dark Side of Java 8

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At Data Geekery, we love Java. And as we’re really into jOOQ’s fluent API and query DSL, we’re absolutely thrilled about what Java 8 will bring to our ecosystem. Java 8 Friday Every Friday, we’re showing you a couple of nice new tutorial-style Java 8 features, which take advantage of lambda expressions, extension methods, and other great stuff. You’ll find ...

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Creating your own loop structure in Java 8 lambda

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Java doesn’t have an easy construct of repeat something N number of times. We can make a for loop of course, but many times we don’t even care about the variable that we created in the loop. We just want repeat N times of some code and that’s it. With the lambda available in Java 8, you may attempt something ...

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How not to use Java 8 default methods

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Warning: you can not make this unseen once you have read I was talking about the multiple inheritance of default methods in the last blog article and how they behave during compilation and run time. This week I look at how to use default methods to do real inheritance, which actually, default methods were not designed for. For this very ...

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Java 8 default methods: what can and can not do?

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What default method is With the release of Java 8 you can modify interfaces adding new methods so that the interface remains compatible with the classes that implement the interface. This is very important in case you develop a library that is going to be used by several programmers from Kiev to New York. Until the dawn of Java 8 ...

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How to process stream and read text file in Java 8

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I have converted one of my old utility class using latest Java8. I use this often to print content of manifest file to check any mysterious jar file for version etc. Just run “java ztools.PrintJar /path/to/my.jar” to see output. In the new code, you will see how I use the Java 8 stream processing to filter what I need from ...

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Java 8 Date Time API Tutorial : LocalDateTime

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This blogpost is a part of tutorial series on Date Time API introduced in Java 8. In this blogpost I will go over some of the methods available in LocalDateTime class. LocalDateTime is an immutable, thread safe object which represents date-time without a time-zone in the ISO-8601 calendar system, such as 2014-03-30T02:51:21. It is normally represented in year-month-day-hour-minute-second and provides accuracy ...

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Add Java 8 support to Eclipse Kepler

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Want to add Java 8 support to Kepler? Java 8 has not yet landed in our standard download packages. But you can add it to your existing Eclipse Kepler package. I’ve got three different Eclipse installations running Java 8: A brand new Kepler SR2 installation of the Eclipse IDE for Java Developers; A slightly used Kepler SR1 installation of the ...

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Java 8 Friday: Optional Will Remain an Option in Java

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At Data Geekery, we love Java. And as we’re really into jOOQ’s fluent API and query DSL, we’re absolutely thrilled about what Java 8 will bring to our ecosystem. Java 8 Friday Every Friday, we’re showing you a couple of nice new tutorial-style Java 8 features, which take advantage of lambda expressions, extension methods, and other great stuff. You’ll find ...

Read More »

Abstract Class Versus Interface in the JDK 8 Era

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In The new Java 8 Date and Time API: An interview with Stephen Colebourne, Stephen Colebourne tells Hartmut Schlosser, “I think the most important language change isn’t lambdas, but static and default methods on interfaces.” Colebourne adds, “The addition of default methods removes many of the reasons to use abstract classes.” As I read this, I realized that Colebourne is ...

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Base64 in Java 8 – It’s Not Too Late To Join In The Fun

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Finally, Java 8 is out. Finally, there’s a standard way to do Base64 encoding. For too long we have been relying on Apache Commons Codec (which is great anyway). Memory-conscious coders will desperately use sun.misc.BASE64Encoder and sun.misc.BASE64Decoder just to avoid adding extra JAR files in their programs, provided they are super sure of using only Sun/Oracle JDK. These classes are ...

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