In Java, you can use String.valueOf() to convert an Integer to String.

Date: 2019-08-11 View: 1299

Try to mock a repository save() method, but it is always returning null?

Date: 2019-08-11 View: 1886

In Spring, we can use Hamcrest APIs like hasItem and hasSize to test a JSON Array. Review the following example :

Date: 2019-08-11 View: 3735

Spring REST Integration Test Example

In this article, we will show you how to test the Spring Boot REST application. Normally, we use the MockMvc or TestRestTemplate for the integration test.

Date: 2019-08-11 View: 1031

Linux script to backup MySQL to Amazon S3

A shell script to backup MYSQL database and upload it to Amazon S3.

Date: 2019-08-11 View: 1659

Few examples to show you how to sort a List with stream.sorted()

Date: 2019-08-11 View: 1489

In Spring Boot, we can create a CommandLineRunner bean to run code when the application is fully started.

Date: 2019-08-11 View: 1266

Spring Boot YAML example

In this article, we will show you how to use YAML instead of properties file in Spring Boot.

Date: 2019-08-11 View: 1602

Java How to declare and initialize an Array

Few Java examples to declare, initialize and manipulate Array in Java

Date: 2019-08-11 View: 1750

The key is boxed() the IntStream into a Stream<Integer>, then only convert to an Array.

Date: 2019-08-11 View: 1676

After some SQL queries, the system is unable to get any connection from the HikariPool and prompts the following error message

Date: 2019-08-11 View: 7746

In Java 8, we can use .toArray() to convert a Stream into an Array.

Date: 2019-08-11 View: 1473

Java JDBC PreparedStatement example to create a SQL IN condition.

Date: 2019-08-11 View: 1699

Spring Boot + Spring data JPA

In this tutorial, we will show you how to use Spring Boot + Spring data JPA to save data into an H2 in-memory database and how to also query the data.

Date: 2019-08-11 View: 1399

Spring Boot + Spring data JPA + MySQL

The previous Spring Boot + Spring data JPA will be reused, modify to support MySQL database.

Date: 2019-08-11 View: 1938