Java Tutorials
Java Tutorials
Explore practical Java hosting tutorials for creating application-server environments, deploying projects, managing Java versions, configuring Maven, scaling applications, enabling clustering, securing servers, and connecting external services.
Getting Started
Java Developer’s Center
Review supported Java technologies, application servers, deployment methods, scaling, clustering, domains, and databases.
Open tutorialJava Versions
Select a supported JDK distribution for a new environment or redeploy an existing Java container to another version.
Open tutorialSetting Up a Java Environment
Create a Java topology with an application server, database, Maven node, load balancer, and the required resource limits.
Open tutorialJava Options and Arguments
Configure JVM memory settings, system properties, startup arguments, debugging, and environment-specific options.
Open tutorialJava Application Servers
Tomcat Server
Create, configure, scale, secure, and deploy applications to an Apache Tomcat environment.
Open tutorialApache TomEE
Deploy enterprise Java applications with WebProfile, MicroProfile, Plus, or PluME distributions.
Open tutorialEclipse Jetty
Create a lightweight Jetty application-server environment and prepare it for Java application deployment.
Open tutorialGlassFish Application Server
Deploy Java EE applications, use the administration console, manage clusters, and configure public access.
Open tutorialWildFly Application Server
Create standalone or Managed Domain WildFly environments with deployment, scaling, and clustering support.
Open tutorialBuilding a Custom Container
Build a custom Java container image, push it to a registry, and deploy it through the platform topology wizard.
Open tutorialDeployment and Build Tools
Java VCS Deployment with Maven
Connect a Git or SVN repository, build a Java project with Maven, and deploy it to an application server.
Open tutorialMaven Build Node Configuration
Manage Maven settings, toolchains, build hooks, project files, private keys, and build variables.
Open tutorialDeploy Java Applications
Upload and deploy WAR, EAR, JAR, and ZIP application packages through Deployment Manager.
Open tutorialUpload JAR Files
Add shared Java libraries to Tomcat, TomEE, Jetty, or GlassFish and load them through a server restart.
Open tutorialScaling and Clustering
Tomcat/TomEE Cluster
Create a highly available cluster with NGINX load balancing, session replication, and automatic scaling.
Open tutorialGlassFish Cluster
Deploy a GlassFish cluster through JPS or configure a manual topology with session replication and failover.
Open tutorialAutomatic Vertical Scaling
Allow Java containers to consume additional RAM and CPU automatically up to configured Cloudlet limits.
Open tutorialAutomatic Horizontal Scaling
Add or remove application-server nodes automatically according to CPU, RAM, network, and disk usage.
Open tutorialConfiguration and Security
Java Application Server Configuration
Edit Tomcat, TomEE, Jetty, and GlassFish settings for one node or an entire application-server layer.
Open tutorialCustom Environment Variables
Store application configuration outside source code using dashboard variables, shell profiles, or server configuration files.
Open tutorialTomcat Security
Protect Tomcat applications with user authentication, role constraints, IP filtering, and firewall controls.
Open tutorialJetty Security
Configure authentication, role-based access, client-address restrictions, and secure management practices.
Open tutorialAdvanced Integration
Java Agent Integration
Upload a Java agent JAR, configure the -javaagent JVM option, and enable monitoring or instrumentation.
Remote Access to EJB on GlassFish
Create a remote EJB interface, deploy an EAR package, and connect a remote Java client through GlassFish.
Open tutorialConnect Java to a Database
Configure JDBC drivers, connection pools, JNDI resources, and private network access to managed databases.
Open tutorialMultiple Domains on Tomcat
Host several applications and domain names through one Tomcat environment using virtual-host configuration.
Open tutorialRecommended learning path
Start with Java Versions and environment creation, continue with the selected application server and deployment workflow, and then add scaling, clustering, security, and advanced integrations.
Important Notes
- Available Java and application-server versions can differ by hosting provider.
- Review application compatibility before changing JDK or server versions.
- Use private networking for communication between application and database nodes whenever possible.
- Back up production data and configuration before redeployment or major topology changes.
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