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

Date: 2019-08-11 View: 1328

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

Date: 2019-08-11 View: 1925

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: 3766

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: 1048

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: 1685

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

Date: 2019-08-11 View: 1505

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

Date: 2019-08-11 View: 1284

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: 1625

Java How to declare and initialize an Array

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

Date: 2019-08-11 View: 1776

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

Date: 2019-08-11 View: 1692

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: 7782

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

Date: 2019-08-11 View: 1489

Java JDBC PreparedStatement example to create a SQL IN condition.

Date: 2019-08-11 View: 1723

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: 1421

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: 1966