Publication date : 01/22/2025
Course : Java, optimization: CPU, memoryDeveloping efficient, reliable applications
Practical course - 4d
- 28h00 - Ref. JOT
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 | Optimize Java application code to improve performance |
| Mastering optimization tools |
| Optimizing virtual machine operation |
| Optimizing the use of standard libraries |
| Optimizing the use of multithreading |
Intended audience
Developers, engineers, project managers close to development.
Prerequisites
Good knowledge of Java. Experience in Java programming required.
Practical details
Hands-on work
The practical exercises in this course do not involve programming, but consist in the use of tools and the analysis of optimized code.
Teaching methods
Throughout the session, you'll become familiar with optimization tools.
Course schedule
1 Optimization methodology and tools
- Optimization principles and strategies.
- Profiling, testing and support tools.
- The elements involved in optimization.
Hands-on work
Use of a profiling tool (VisualVM or JFR) and a unit testing tool (JUnit).
2 Caches
- The general principle of caches, important methods.
- The main collections used as caches.
Hands-on work
Improve application performance by introducing caches. Use of a profiling tool (VisualVM or JFR).
3 Memory optimization and management
- Create and copy objects and arrays (clone vs. copy constructors).
- Non-modifiable objects, non-mutable objects, object pools.
- The different GCs (algorithms, parameterization, activity visualization).
- Memory dumps, memory saturation (causes, diagnosis, solutions).
- Soft, weak, phantom references;
Hands-on work
Improving application performance through better object management. Use of a tool for visualizing memory (VisualVM) and GC activity (Visual GC).
4 Optimization and multithreading
- Parallelism versus competition.
- Main concepts: Runnable, Thread, Callable<T>, ExecutorService, ...
- The impact of parallelism and concurrency on performance.
- Some optimization solutions.
Hands-on work
The introduction of threads (parallelization and concurrency management) improves the performance of the control application.
5 Optimization and language
- Different execution and compilation modes.
- Optimal use of types, instructions and methods.
- Lambda-expressions, streams, ...
- String manipulation.
Hands-on work
Improved benchmark application performance.
6 Optimization and I/O
- The nio library. Buffers and channels. Selectors and their use.
- Choosing the right stream classes.
- Optimizing serialization.
Hands-on work
Improved witness application performance through better IO management.
Customer reviews
4,2 / 5
Customer reviews are based on end-of-course evaluations. The score is calculated from all evaluations within the past year. Only reviews with a textual comment are displayed.
STEVEN P.
09/09/25
4 / 5
Too theoretical, very academic examples, no real practical exercises. These very technical subjects need to be supported by practical exercises.
THOMAS C.
09/09/25
4 / 5
Rich content. May need to be updated with the latest Java releases.
SÉBASTIEN R.
09/09/25
4 / 5
Fine
PARTICIPANTS
Developers, engineers, project managers close to development.
PREREQUISITES
Good knowledge of Java. Experience in Java programming required.
TRAINER QUALIFICATIONS
The experts leading the training are specialists in the covered subjects. They have been approved by our instructional teams for both their professional knowledge and their teaching ability, for each course they teach. They have at least five to ten years of experience in their field and hold (or have held) decision-making positions in companies.
ASSESSMENT TERMS
The trainer evaluates each participant’s academic progress throughout the training using multiple choice, scenarios, hands-on work and more.
Participants also complete a placement test before and after the course to measure the skills they’ve developed.
TERMS AND DEADLINES
Registration must be completed 24 hours before the start of the training.
ACCESSIBILITY FOR PEOPLE WITH DISABILITIES
Do you need special accessibility accommodations? Contact Mrs. Fosse, Disability Manager, at psh-accueil@orsys.fr to review your request and its feasibility.
Developers, engineers, project managers close to development.
PREREQUISITES
Good knowledge of Java. Experience in Java programming required.
TRAINER QUALIFICATIONS
The experts leading the training are specialists in the covered subjects. They have been approved by our instructional teams for both their professional knowledge and their teaching ability, for each course they teach. They have at least five to ten years of experience in their field and hold (or have held) decision-making positions in companies.
ASSESSMENT TERMS
The trainer evaluates each participant’s academic progress throughout the training using multiple choice, scenarios, hands-on work and more.
Participants also complete a placement test before and after the course to measure the skills they’ve developed.
TEACHING AIDS AND TECHNICAL RESOURCES
• The main teaching aids and instructional methods used in the training are audiovisual aids, documentation and course material, hands-on application exercises and corrected exercises for practical training courses, case studies and coverage of real cases for training seminars.
• At the end of each course or seminar, ORSYS provides participants with a course evaluation questionnaire that is analysed by our instructional teams.
• A check-in sheet for each half-day of attendance is provided at the end of the training, along with a course completion certificate if the trainee attended the entire session.
• The main teaching aids and instructional methods used in the training are audiovisual aids, documentation and course material, hands-on application exercises and corrected exercises for practical training courses, case studies and coverage of real cases for training seminars.
• At the end of each course or seminar, ORSYS provides participants with a course evaluation questionnaire that is analysed by our instructional teams.
• A check-in sheet for each half-day of attendance is provided at the end of the training, along with a course completion certificate if the trainee attended the entire session.
TERMS AND DEADLINES
Registration must be completed 24 hours before the start of the training.
ACCESSIBILITY FOR PEOPLE WITH DISABILITIES
Do you need special accessibility accommodations? Contact Mrs. Fosse, Disability Manager, at psh-accueil@orsys.fr to review your request and its feasibility.
Dates and locations
Select your location or opt for the remote class then choose your date.
Remote class
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Date garantie en présentiel ou à distance
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