2022-01-15 13:04
Open any Java class file, type the text main and press ctrl + space, then you will see the option to generate the signature for ‘public static void main’ method. Previous &n&hell…Read More
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Tutorial on Java, Design Patterns, collections, Struts, jdbc
2022-01-14 10:18
You can define custom Jackson annotation using @JacksonAnnotationsInside. @JacksonAnnotationsInside is a meta-annotation used to create a "combo-annotations" by having a container annotation… Read More
2022-01-14 10:17
@JsonAutoDetect annotation is used to customize the visibility semantics for data serialization. For example, below snippet enables the serialization of private properties.'JsonAutoDete… Read More
2022-01-14 09:19
In this post, I am going to explain how to beautify application error messages using MessageFormat class. ‘java.text.MessageFormat’ class provides a format method that take… Read More
2022-01-12 16:10
Step 1: Get an instance of the class.Class> clazz = Class.forName("com.sample.app.Test");Step 2: Get the main method of Test class.Method main = clazz.getMethod("main", String[].cla… Read More
2022-01-12 15:58
What is multi module project? A multi module project is used to manage a group of submodules. A multi-module project is built from an aggregator POM which is located in the project&rsq&hell…Read More
2022-01-06 11:24
Recently I observed a noticeable behavior of instanceof operator while working with interfaces and classes. Let me explain with an example. InstanceOfDemo.javapublic class InstanceOfDe… Read More
2022-01-06 10:09
Loop inversion is a compiler optimization technique where a while loop is replaced by an if block containing a do..while loop. How does loop inversion improve performance? Let me expla… Read More
2021-12-14 08:54
Below snippet convert the json to Pretty json string.String uglyJson = "{\"name\": \"Krishna\", \"age\": 31}";Gson gson = new GsonBuilder().setPrettyPrinting().create();JsonElement jsonEleme… Read More
2021-12-14 08:45
Java takes the current directory as default classpath, you can customize this using -cp option. Syntax In Linux and MAC systemsjavac -cp jar1:jar2:jar3:dir1:dir2:. HelloWorld.javajava… Read More
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