01
Licensing trap: numbers and risks
How Oracle Java licensing rules changed, who may be included in the employee definition, and why it pays to start with an inventory.
E-book for CFOs, CTOs and IT operations
Take control of Java costs
The e-book explains how to navigate Oracle Java's new licensing model, when it makes sense to stay with your current setup, and when to consider a supported OpenJDK option such as Azul Platform Core.
A practical view of costs, risks and migration steps. The e-book itself is in Czech.
6
chapters
3
roles
FAQ
from practice
Licensing costs under pressure
Oracle Java SE Universal Subscription can change how companies calculate costs. The e-book explains why inventory and budget impact matter first.
The decision is not black and white
Sometimes staying with Oracle makes sense. In other cases, supported OpenJDK is a rational option. The guide helps distinguish both scenarios.
Production safety and stability
A runtime migration must not put operations at risk. The e-book covers discovery, rollout, validation and a rollback plan for IT Ops.
E-book contents
What you will take away from the guide
Get an overview of what Oracle Java licensing changes mean for your budget, operations and long-term IT strategy.
02
Stay with Oracle, or migrate?
A pragmatic decision framework: when the current solution is fine and when supported OpenJDK starts to make sense.
03
Comparing OpenJDK distributions
What to look for in enterprise deployments: TCK certification, SLA, security patches, multiplatform support and vendor lock-in.
04
Migration step by step
Discovery, rollout and validation in practice, including why a drop-in replacement does not have to mean rewriting applications.
Guide preview
Before you migrate, you need to know whether it is worth it
The e-book does not start with technical steps. It first helps identify when migrating from Oracle Java is economically and operationally reasonable, and when staying with the current solution may be the better path.
Quick decision test
Helps you verify whether Java represents a licensing risk in your company or simply a normal operating item.
CFO and CTO perspective
Combines budget impact, support for critical systems and practical migration feasibility.
Safe approach
Migration is not a one-time leap. It is a controlled IT project.
In the practical section, the e-book shows three steps: discovery, rollout and validation. You first identify where Java runs, then prepare the runtime replacement, and finally validate functionality through tests or key users.
Important: The goal is not to promise migration without work. The goal is to show how to do it with a reasonable plan, minimal risk and a clear rollback scenario.
Who the e-book is for
One problem, three perspectives
The e-book connects financial, technical and operational views. It is useful for companies dealing with Java costs, support for older systems, or preparation for a licensing audit.
CFO
Budgets, cost predictability, audit risk and a realistic estimate of possible savings.
CTO / IT Director
Platform strategy, compatibility, security patches, SLA and limiting vendor lock-in.
IT Ops
Inventory, JAVA_HOME changes, regression tests, deployment packages and a rollback plan.
Why now
Map first. Decide next.
The e-book is not about pushing immediate migration at any cost. It helps you get visibility, ask the right questions and prepare a qualified decision.
up to 70%
Potential savings compared with Oracle in model scenarios described in the e-book. The real impact depends on infrastructure and licensing situation.
0 lines
With a drop-in migration, application source code typically does not change. Testing and validation are still required.
E-book download
Get the e-book by e-mail
Fill in your contact details and download the practical guide to migrating from Oracle Java to a supported OpenJDK solution.
Please note: the e-book is currently available in Czech.
What you will find inside:
- Explanation of the new Oracle Java licensing model.
- A framework for deciding whether to stay with Oracle or migrate.
- A practical discovery, rollout and validation process.
- FAQ with questions companies ask before migration.
FAQ
Questions companies ask before migration
Will migration cost more than the licenses themselves?+
The e-book explains why technical compatibility is key and why a drop-in replacement usually does not require rewriting applications. Real ROI depends on the number of instances, servers and your current licensing model.
What if an application breaks after replacing the runtime?+
The guide describes testing, JAVA_HOME handling and a rollback plan. The point is to migrate in a controlled way, not in one jump without validation.
We have older systems on Java 6 or 7. Can this be solved?+
Yes, support for legacy versions is one of the topics in the e-book. Each application, its dependencies and operational risks still need to be assessed individually.
How do we start if we do not know where Java runs?+
The first step is discovery: inventory of versions, environments, application owners and links to support contracts. Without it, both costs and risks are hard to estimate.
Take control of your Java environment before an audit or budget pressure forces the issue.
Download the e-book and walk through the decision questions, option comparison and practical safe migration process.