A simple and flexible way to create threads without extending the Thread class.

Where Does Your Data Actually Live?

understand where Java stores data and how threads see it.

How Java Cleans Up Memory

Why Some Objects Never Change

Els grups municipals del PSPV i Compromís a l'Ajuntament de Montcada han frustrat la petició de l'oposició de reprovar el regidor de Seguretat i Fester, el socialista Martín Pérez Aranda. Un vídeo el mostra llançant-se des de l'escenari d'un concert, amb una puntada voladora, contra la multitud que corejava "Pedro Sánchez, fill de puta". Els fets es remunten a la matinada del 7 de setembre i han motivat l'obertura de diligències, per part de la Guàrdia Civil, per possible desorde públic.

Els grups municipals del PSPV i Compromís a l'Ajuntament de Montcada han frustrat la petició de l'oposició de reprovar el regidor de Seguretat, el socialista Martín Pérez Aranda. Un vídeo el mostra llançant-se des de l'escenari d'un concert, amb una puntada voladora, contra la multitud que corejava "Pedro Sánchez, fill de puta". Els fets es remunten a la matinada del 7 de setembre i han motivat l'obertura de diligències, per part de la Guàrdia Civil, per possible desorde públic.

Hello guys, if you’ve been a Java developer for a while, you’ve probably hit that point where you feel comfortable with the basics but start asking yourself: “What’s next? How do I go from being just good at Java to truly mastering it?” . That’s exactly where Heinz Kabutz’s Java Specialists Superpack 2025 comes in. And it’s not your average online course—it’s more like a complete university for senior Java developers, condensed into one structured, ever-expanding bundle. Let’s break it down. --- Java, Unix, Tibco RV and FIX Protocol Tutorial

Hello guys, I have an interesting news to share with you today. After a long wait of almost 10 years, the Effective Java 3rd edition is finally coming this year, hopefully, December 2017. The Effective Java 2nd Edition was released in May 2008 and updated for Java SE 6, but it been, good 10 years now and there is a lot of interest from Java developers around the world for Effective Java 3rd edition after Java SE 8 release and I am very happy to inform you guys that, finally, all our wishes are granted and Effective Java 3rd edition is set to arrive this year. It will not only cover Java 9 release but also all the changes from Java 7 and Java 8. --- Java, Unix, Tibco RV and FIX Protocol Tutorial

Suppose you have a comma-separated list of String e.g. "Samsung, Apple, Sony, Google, Microsoft, Amazon" and you want to convert it into an ArrayList containing all String elements e.g. Samsung, Apple, Google, etc. How do you do that? Well, Java doesn't provide any such constructor or factory method to create ArrayList from delimited String, but you can use String.split() method and Arrays.asList() method together to create an ArrayList from any delimited String, not just comma separated one.  --- Java Interview questions and tutorials

Hello guys, if you worked in Java GUI-based application then you may know that Swing provides class javax.swing.JFileChooser can be used to present a dialog for the user to choose a location and type a file name to be saved, using the showSaveDialog() method. Syntax of this method is as follows: public int showSaveDialog(Component parent) where the parent is the parent component of the dialog, such as a JFrame. --- Java Interview questions and tutorials

Hello guys, float and double are two of the important data types in Java, but many developers don't pay enough attention to these two data types, resulting in writing poor code with subtle bugs. To be honest, they are not easy to use because of the complexity with floating-point calculation but knowing even simple things like the maximum and minimum limit of float and double data types and how to compare float and double variables can go a long way in eliminating bugs which are not obvious. --- Java Interview questions and tutorials

In the last couple of examples, I have taught you how to convert String to Integer, Long, Double, Float, Boolean, and Byte in Java, and today I will show you how to convert String to Short in Java, but before that let's revise what is a short data type in Java. The short is an integral data type similar to the int but it only takes 2 bytes to store data as compared to 4 bytes required by an int variable. Since it takes only 2 bytes or 16 bits to store data, the range of short is also shorter than int. It ranges from -32,768 to 32767 (inclusive) or -2^15 to 2^15 -1. You might be wondering why the upper bound is 255 and the lower bound is -256 but that's because we have included zero in between. --- Java Interview questions and tutorials

Hello guys, if you have been using Eclipse for Java development then you might have seen this dreaded  "Access restriction: The type BASE64Decoder is not accessible due to restriction Error" before. This error comes when you are trying to encode String into Base64 using BASE64Decoder in Eclipse because the class BASE64Decoder is not part of JDK's public API, it comes from sun.misc package which is non-public. Though this class is present in JDK and JRE and allows you to encode and decode String into base 64, any access to this class from Eclipse flags as an error in Eclipse IDE. If you compile and run the same program from the command line or NetBeans you will not get this error. --- Java Interview questions and tutorials

Hello guys, this is one of the common errors in a client-server application. The big problem in solving this error is not the error but the knowledge of how client-server SSL handshake works. I have blogged about that before and if you have read that you know that in order to connect to any website or server (like LDAP Server) using SSL, you need to have certificates (public keys) to validate the certificates sends by the website you are connecting. If you don't have the root certificate or public key, which is required to validate the certificate presented by the server in your JRE truststore then Java will throw this error. --- Java Interview questions and tutorials