Building a Java application with Spring Boot in NetBeans

Spring Boot simplifies the creation of production-ready Java services by providing sensible defaults, embedded servers, dependency management and a large ecosystem of starters. NetBeans adds a productive workspace for editing, refactoring, Maven builds, debugging and test execution.

For developers in Australia, this combination is practical for internal tools, REST APIs and customer-facing applications. A project can be developed on a laptop in Melbourne, tested against a database hosted in Sydney and deployed with configuration suited to Australian time zones, currency and privacy requirements.

The process is straightforward: install a suitable JDK, generate a Maven project, open it in NetBeans, build a small endpoint and expand the design with services, persistence and tests. The following workflow keeps the first application manageable while leaving room for enterprise features.

Approach	Best use	Main consideration
Spring Boot with Maven	REST APIs and web services	Requires a clear package structure
Spring Boot with Spring Data JPA	Database-backed applications	Entity design and transactions need care
Spring Boot with server-side templates	Small web portals and administration screens	Less suitable for rich browser interfaces
Spring Boot with a separate frontend	Larger customer applications	Adds build and deployment complexity

Prepare the NetBeans workspace

Install a current long-term-support JDK, such as JDK 21, and confirm it is available from the command line with java -version. Install the latest stable NetBeans release, then open the Java and Maven settings to check that NetBeans is using the intended JDK rather than an older system installation.

Create a dedicated folder for projects and avoid storing source code in temporary download directories. Developers working across Sydney, Brisbane or Perth should also check the operating system time zone, since logs and scheduled jobs can behave unexpectedly when daylight saving changes affect Australia/Sydney but not Queensland or Western Australia.

A Maven project is generally the simplest starting point. Maven downloads Spring dependencies, runs tests and packages the application into an executable JAR without requiring a separate application server.

Generate the Spring Boot project

Visit Spring Initializr through a browser, select Maven, Java and the required Spring Boot version, then choose the web dependency. Add Spring Boot DevTools for local feedback and Spring Boot Starter Test for JUnit and Spring testing support. For a database application, include Spring Data JPA and the driver for PostgreSQL or MySQL.

Use a meaningful group such as au.example and an artifact such as customer-service. Download the generated archive, extract it, and use NetBeans’ Open Project command to load the folder. NetBeans recognises the pom.xml, resolves dependencies and displays the standard src/main/java, src/main/resources and src/test/java directories.

The main class should resemble this:

@SpringBootApplication
public class CustomerServiceApplication {
    public static void main(String[] args) {
        SpringApplication.run(CustomerServiceApplication.class, args);
    }
}

Keep this class in the root package so component scanning can find controllers, services and repositories beneath it.

Create a useful web endpoint

Add a controller in a package such as au.example.customers.web:

@RestController
@RequestMapping("/api/customers")
public class CustomerController {

    @GetMapping("/{id}")
    public Map<String, Object> findCustomer(@PathVariable long id) {
        return Map.of("id", id, "status", "active");
    }
}

Run the project from NetBeans with the Run Project command. Spring Boot starts an embedded server, usually on port 8080. Test the endpoint with a browser, NetBeans’ HTTP client or a command such as curl http://localhost:8080/api/customers/42.

For a real service, return a DTO rather than a generic map and add validation, consistent error responses and suitable HTTP status codes. Australian businesses often display prices in AUD and include GST, so represent monetary values with BigDecimal and document whether an amount includes the 10 per cent goods and services tax.

Connect persistence and business logic

Separate responsibilities into a controller, service and repository. The controller should handle HTTP details, the service should contain business rules, and the repository should manage data access. This arrangement makes unit tests easier and prevents database code from spreading through web classes.

With Spring Data JPA, create an entity and repository interface, then configure the database connection in application.yml. Keep passwords outside source control by using environment variables or a secrets manager. A development database can run locally, while a production instance may be hosted in an Australian cloud region to reduce latency and simplify data residency discussions.

Spring Boot can also coexist with Jakarta EE components in a larger migration. If an existing system still relies on EJB technology, a stateful session bean example can help clarify how conversational state differs from the stateless service pattern commonly used in Spring applications.

Test, debug, and document the service

Create unit tests for service rules and web tests for endpoint behaviour. Spring Boot’s test starter supports JUnit 5, while @WebMvcTest can test a controller without starting every application component. Use NetBeans breakpoints, the Variables window and the debugger console to inspect requests as they move through the application.

Run mvn test before committing changes, and use mvn package to produce the executable JAR. Add JavaDoc to public services and configuration classes so another developer can understand the API’s purpose. NetBeans also supports GUI-oriented Java work; developers maintaining a desktop tool can explore custom Swing palette setup alongside their Spring project.

API documentation should state authentication requirements, validation rules and example responses. For applications handling names, addresses or contact details, review obligations under Australia’s Privacy Act 1988 and the Australian Privacy Principles before collecting more information than the feature requires.

Recommendations for a reliable Australian deployment

A small application benefits from disciplined defaults before it reaches production. Use profiles for local, test and production settings, log structured events, and expose only the health information needed by monitoring systems. Review dependency updates regularly because Spring Boot applications rely on a substantial third-party ecosystem.

Apply these practices as the project grows:

• Use a supported JDK and record the Java version in the Maven build.
• Store secrets in environment variables or a managed secrets service.
• Set ZoneId.of("Australia/Sydney") only when business rules genuinely require Sydney time.
• Store monetary values as BigDecimal, with explicit AUD and GST handling.
• Add database migrations with Flyway or Liquibase rather than relying on automatic schema changes.
• Protect personal information with access controls, encryption and appropriate retention rules.
• Run automated tests and dependency checks in the deployment pipeline.

A container image or executable JAR can be deployed to a cloud platform, a Linux virtual machine or an on-premises environment. Configure the application’s port, database URL and active profile through the deployment system, then monitor response time, error rates and database connections after release. This gives a NetBeans-built Spring Boot service a clear path from local development to dependable Australian production use.