public int sum(int a, int b, int c) { // body of the method } class Printer { // fields public void printBook(String bookName) { // … } public void printBook(String bookName, int numberOfPages) { // … } } class Printer { // fields public void printBook(String bookName) { // … } public String printBook(String…
Read More Method Overloading in JavaThis tutorial covers three distinct methods for reading application properties in a Spring Boot application. These methods include: Using the Environment object. Using the @ConfigurationProperties annotation. Using the @Value annotation. I made a simple Spring Boot Web App to show you how to read application properties. You can use the tutorial Create a Simple Web…
Read More Spring Boot: Reading Application PropertiesWorking with strings is a fundamental aspect of programming, and Java provides a rich set of tools and methods for manipulating strings. One common task when working with strings is to remove whitespace characters such as spaces, tabs, and newlines. There are several ways to accomplish this in Java, including using the replaceAll() method from…
Read More Removing Whitespaces in Java StringsMethod security testing is the process of testing the security of each method to make sure that only authorized users can access them. By testing the method-level security, we can ensure that our application is secure and that users can only perform the actions that they are authorized to do. Let’s say we built an…
Read More Testing Method Security in Spring BootIn this blog post, I will share how to run a Spring Boot app from the command line in a Terminal window. There are a couple of ways to do this, and both assume that you have already created your Spring Boot app. If you need help creating a new Spring Boot app, please check…
Read More How to Run Spring Boot App via Command LineIn this REST Assured tutorial, I will demonstrate how to evaluate the JSON content that is returned in the response body of an HTTP response. What is REST Assured? REST Assured is a Java-based library for testing RESTful web services. It provides a domain-specific language (DSL) for writing tests that interact with web services using…
Read More Validate JSON Response with REST AssuredIn this tutorial, you will learn how to create “Tabs” or “Tab Bar” in Flutter. For this purpose we will follow the next steps: Create a new Flutter app, Create the Tab Controller, Create the Tabs Content. 1. Create a New Flutter Project Go ahead and create a new Flutter app. If you don’t know…
Read More Creating Tabs in FlutterIn this lesson, you will learn about the history of Java, types of Java programs, Java Virtual Machine (JVM), Java Standard Library and current Java editions. History Java was developed in 1991 by the Green Team, comprising James Gosling, Mike Sheridan, and Patrick Naughton, as a pilot project for a simple language to program smart…
Read More Introduction to JavaOutput: Brand is: Ford This is a Ford with a number of seats 5 and with colour blue
Read More Java Inheritance: A Beginner’s GuideThis Spring Data JPA tutorial will demonstrate how to use the LIKE % expression in a Native SQL Query. In an advanced SQL LIKE expression, the % sign represents zero, one, or multiple characters within the SQL query. Let’s take a look at a Native JPA SQL Query that employs an advanced SQL LIKE expression…
Read More LIKE % Expression in JPA SQL QueriesThis blog post will guide you on reading the body of an HTTP request in the filter class of your Spring Boot application. For more code examples, you can refer to the Spring Boot tutorials page. What is a Spring Filter? A Spring Filter is an object that intercepts incoming HTTP requests and outgoing HTTP…
Read More Reading Request Body in Spring FilterThis short REST Assured tutorial will teach you how to validate the HTTP Response Status Code while testing a RESTful Web Service endpoint. Each HTTP Response includes a status code, and by examining the status code value, we can determine if the HTTP Response was successful or not. Let’s explore how we can use REST…
Read More Validate HTTP Status Code: RestAssuredIn this tutorial, we will explore how to use the Java HttpClient to upload a file to the server. In the next tutorial, we will cover how to configure HttpClient to accept all SSL certificates. Let’s get started! In the code example below, we will use the Apache HttpClient and the MultipartEntityBuilder. HttpClient Maven Dependencies…
Read More Java File Upload using HttpClientThis tutorial will teach you how to use the @Query annotation to execute custom SQL queries. Spring Data JPA provides many query methods that are ready to use, allowing us to perform basic CRUD(Create, Read, Update and Delete) operations. However, there may be situations where we need to execute a custom SQL query even though…
Read More Spring Data JPA Native SQL QueryConvert char to String in Java using the String.valueOf() method There is a valueOf() static method in the String class that returns the String representation of its argument, which can be a char or any other data type. public class Test { public static void main(String[] args) { char ch = ‘a’; String str =…
Read More Convert Char to String in Java