Technical…Practical…Theoretical…
We will discuss about strictfp keyword in Java. strictfp is a keyword in the Java programming language that restricts floating-point calculations to ensure portability. The strictfp was introduced into Java with the Java virtual machine (JVM) version 1.2 and is available for…
Introduction This tutorial shows an example on Python Flask username availability check with MySQL, AJAX. Sometimes we need to check username availability instantly before a user submits the form after filling a lengthy signup form. In this case we can use AJAX…
Introduction The Spring @ConditionalOnWebApplication and @ConditionalOnNotWebApplication annotations let configuration be included depending on whether the application is a web application. A web application is any application that uses a Spring WebApplicationContext, defines a session scope, or has a StandardServletEnvironment.
Introduction We will discuss here why PermGen space was removed from Java 8. What is PermGen Space? The PermGen or permanent generation space is special space because it holds meta-data describing user classes, i.e., classes that are not part of the Java…
Introduction We will create examples on Spring @ConditionalOnExpression. The @ConditionalOnExpression annotation lets configuration be included based on the result of a SpEL (Spring Expression Language) expression. For our example the Module class is only loaded if a particular SpEL is enabled. This way, we might create…
Introduction We will see an example on Python Flask multi-step registration form with MySQL, jQuery. Sometimes we need to capture lots of user details during registration process and as a result we got long forms on web page. So the best solution…
Introduction We will create examples on Spring @ConditionalOnResource. The @ConditionalOnResource annotation lets configuration be included only when a specific resource is present in the classpath. For our example the Log4j class is only loaded if the log4j configuration file was found on the classpath. This…
Introduction We will discuss here what is Optional.get() in Java. Optional is a class and get is a method in this class. Java 8 was a huge improvement to the platform and one of the new features was added Optional.get(). So using…
Introduction We will discuss on String vs StringBuffer vs StringBuilder here. Basically we will find the differences between String, StringBuffer and StringBuilder.
Introduction We will see an example on ClassNotFoundException vs NoClassDefFoundError. ClassNotFoundException is an exception whereas, NoClassDefFoundError is an error. We will discuss the difference between ClassNotFoundException and NoClassDefFoundError with examples.