Java is a first-class object-oriented language. With the exception of primitive data types, everything in Java is an object. Even an array is an Object. Every class creates instances that are objects. There is...
Java 8 Default Method tutorial. Overview of Virtual extension method in Java 8. How to define default methods to interfaces in Java 8.
Here is a complete list of Locales in Java. This list is compiled using the mighty java.text.SimpleDateFormat class. The class SimpleDateFormat provides a method getAvailableLocales() which gives array of java.util.Locale objects. This is java...
Since the dawn of modern web applications, push notifications have gained significant traction in industry. Instead of polling data from server it has now become common that server should notify client. Ajax is so...
Here is a small write-up which should help those who still write plain Java JDBC code. I know we have some wonderful persistence frameworks like Hibernate that make ones life comfortable but the reality...
While reading through Stackoverflow, I came up to this interesting question: Java Properties File binding to Java Interface. The idea is simple but quite helpful. Basically we create an interface like: And whenever we want...
System.out and System.err stream objects are mapped to “standard” output and error stream respectively. By default, Java display standard output/error on display console. Thus, when we print a statement using System.out: It prints the...
Apache POI is a powerful Java library to work with different Microsoft Office file formats such as Excel, Power point, Visio, MS Word etc. The name POI was originally an acronym for Poor Obfuscation Implementation,...
When you use JSTL format tag <fmt:formatDate> and <fmt:formatNumber>, JSTL automatically takes care of locale resolution. Depending on the browser’s locale setting JSTL will display the date and numbers. You may want to override this default behavior....
Whenever you write a Java class in Eclipse which implements java.io.Serializable interface, you’ll get this warning: The serializable class XXXX does not declare a static final serialVersionUID field of type long Why do we...