What is OpenJDK?
I talk to many people about how they use Java, and I find there is a high level of misunderstanding about what OpenJDK is. The idea of this post is to provide a clear description of what OpenJDK is and isn’t.
Let’s start with some history. Back in 2006, the management of Sun Microsystems (the original developer of Java) decided to make the source code of the Sun implementation of the Java platform available under an open-source license. This decision had been influenced by several factors, not least of which many Java users had been asking for it. The Apache Harmony project had started a year or so earlier with the express goal of providing an open-source implementation of Java. Sun management felt that it would be better for their implementation to be the canonical source.
The initial announcement was made at the JavaOne conference in 2006. Later that year, most of the HotSpot virtual machine and compiler code was released under the GNU Public License (GPL) with classpath exception.
As a side note, it’s also worth mentioning that the JVM included in all OpenJDK Java versions is HotSpot. People occasionally think that HotSpot is synonymous with the Oracle JDK. Whilst the Oracle JDK does indeed include the HotSpot VM; this is only because it is part of OpenJDK. All unmodified builds of OpenJDK, therefore, use the HotSpot VM.
On May 8 th , 2007, the bulk of the code for the JDK class libraries was released (under the same license), and the OpenJDK project came into existence. There remained several closed-source pieces that Sun did not have the rights to, but these were gradually replaced. With the release of build 53 of OpenJDK 7, it was finally possible to build the entire JDK from open-source code.
If you look at the web page, the description is pretty unambiguous:
“The place to collaborate on an open-source implementation of the Java Platform, Standard Edition, and related projects.“
Donald Smith (Senior Director of Java Product Management at Oracle) is very clear about this, “OpenJDK is a place, not a thing“. This is quite true; however, we can also think of OpenJDK in terms of the OpenJDK projects (which are things). As you would expect from the definition, OpenJDK is organised into a set of distinct projects. At the time of writing, there were 73 projects. These encompass a wide variety of activities related to Java SE:
- From JDK 6 to JDK 9, each version of Java is a separate project. Updates to JDK 7 and 8 also have projects independent from the initial implementation. However, with the switch to the six-month release cadence, all versions from JDK 10 onwards are covered by a single umbrella project. Updates, likewise, are now covered by a single project. is the project for the open-source development of JavaFX. Originally part of the Oracle JDK, this was removed as of JDK 11.
- There are several projects for more significant developments for the Java platform, such as:
(small Java language features)
(lightweight user-mode threads)
(a replacement for JNI to interconnect the JVM with native code)
(value types and generic specialisations)
The most critical aspect of OpenJDK when dealing with the JDK is that it only represents source code (in the form of repositories). When I ask people which Java they are using, I will often get the response, “We use OpenJDK”. That’s fine, but it’s like answering “Linux” to the question of which operating system you use. OpenJDK provides all the source code for the Java Development Kit but, to run an application compiled into bytecodes, you need a binary distribution of the JDK. OpenJDK does not provide any pre-built binary distributions. Even though the OpenJDK project is hosted on the java.net domain, the Oracle OpenJDK JDK binaries you can download from jdk.java.net are not part of OpenJDK.
OpenJDK is more than this, though.
The Java platform is defined by a standard created under the Java Community Process (JCP). Each version of Java Standard Edition (SE) has a different Java Specification Request (JSR). An expert group is formed for each JSR and produces three distinct deliverables:
- A specification in the form of the Java Language Specification, the Java Virtual Machine Specification and javadocs for the required class libraries.
- A Technology Compatibility Kit (TCK) can verify that implementations of the standard conform to the specification. For Java SE, this is the Java Compatibility Kit (JCK), but almost everyone refers to it as the TCK.
- A Reference Implementation, which demonstrates that it is possible to implement the specification. For all releases since Java SE 7, this has been the corresponding OpenJDK project.
Whilst the reference implementation of each Java version is part of OpenJDK; it is still essential that any distribution built from OpenJDK code is verified with and passes all the tests of the TCK. Even apparently minor things, like the version of a compiler being used or the command-line flags to that compiler, could, potentially, cause the resulting binaries to fail one or more tests. On the other hand, a TCK tested OpenJDK binary provides you with a high level of confidence (since no test suite can be completely exhaustive) of compatibility with another TCK-tested distribution.
What is not part of OpenJDK?
If you look at the Oracle JDK prior to Java 11, you will find some components that are missing from OpenJDK. The most obvious of these are the Applet Browser Plugin, Java Web Start and JavaFX. In the case of JavaFX, as already mentioned, this is a separate OpenJDK project, OpenJFX. The other parts remain closed-source.
In the same way that you can choose different Linux distributions (Ubuntu, Debian, Red Hat, etc.), there are plenty of choices of OpenJDK binary distribution. We here at Azul provide our Zulu builds of OpenJDK, both for free and commercially supported in the form of Azul Platform Core. Almost all builds are TCK tested; the exception is OpenJDK 6 (since the TCK is no longer available).
Decisions about how the Java platform evolves has changed over the lifetime of the OpenJDK.
Although the specification of what is in each release of Java SE is still published through a JSR, the Java SE Expert Group no longer decides what to add or remove. Instead, this is now handled through OpenJDK using JDK Enhancement Proposals (JEPs). JEPS collect, review, sort, and evaluate proposals for enhancements to the JDK. The formal description of the JEP mechanics is described in JEP 1. The goal of JEPs is to provide a roadmap of potential new JDK features that lasts for at least three years. However, there is no intention that all JEPs submitted will end up in the JDK at some point.
In summary, then, OpenJDK is many things. At its core, it delivers the source code used to provide users with a wide choice of distributions on which to run their applications. It also provides an open and inclusive way to define the future of the Java platform.
Do you want to use OpenJDK to run your Java workload? Then why not try Zulu? It’s free.
How to Fix OpenJDK Platform Binary High CPU on Windows 10/11? [MiniTool Tips]
If you regularly work with Java-based applications, you’ve probably heard of the OpenJDK platform binary. What is OpenJDK platform binary? How to fix the OpenJDK platform binary high CPU issue? This post from MiniTool introduces answers.
What is OpenJDK platform binary? It is the Java environment that the game runs in. Compiling and executing your classes using the OpenJDK platform is beneficial as it guarantees security and performance.
However, some players report that when they open Minecraft, they encounter the OpenJDK platform binary high CPU issue. The following is a user’s feedback:
Whenever I open games on PC similar to Pummel Party, Subnautica, or Cyberpunk2077 my fans run at 100% because the CPU is being used at 100% from the OpenJDK Platform Binary application. Games like League of Legends, Minecraft, and GTA V don’t cause such resource usage.
There are three reasons for the issue — outdated driver, issues with the game, and issues with integrated GPU.
This post introduces 11 solutions for you to fix the “Firefox high CPU on Windows 10/11”. Besides, it will also provide reasons for the issue.
How to Fix OpenJDK Platform Binary High CPU Issue
Here are 3 solutions to fix the OpenJDK platform binary Minecraft high CPU issue.
Solution 1: Update Your Graphics Driver
An outdated graphic drive can cause the OpenJDK platform binary high CPU. Thus, you can update your graphics driver to remove the issue.
Step 1: Right-click the Start menu to choose Device Management to open it.
Step 2: Right-click your graphics driver to choose Update driver.
Step 3: Then, you can choose Search automatically for drivers or Browse my computer for drivers.
After updating your graphics driver, you can check if the OpenJDK platform binary high CPU issue ha been fixed.
Solution 2: Disable Integrated Graphics from BIOS
You can also try to fix the OpenJDK platform binary high CPU issue by disabling Integrated Graphics from BIOS.
Step 1: Press the Win + I keys together to open Settings.
Step 2. Scroll down to click Update & Security.
Step 3. In the Recovery tab, click Restart now under Advanced startup and then your computer will enter the Windows recovery environment.
Step 4. Press UEFI Firmware Settings to boot your PC into UEFI BIOS.
Step 5: Look for a setting with onboard, integrated video, VGA under Integrated Peripherals, Onboard Devices, or Built-in Devices.
Step 6: Change integrated graphics into disable or off by pressing Enter.
Step 7: According to the on-screen instructions, press the corresponding F-key to save your changes and click Y to confirm your action.
Solution 3: Perform a System Restore
If the above solutions are not working, you can try to perform a system restore to fix the “OpenJDK platform binary high CPU” issue. You need to notice that only if you have created system restore point, you can try this method. Follow the guide below to do that:
Step 1: In the start menu, search for create a recovery drive and open it. This will lead you to the system protection tab in the system properties.
Step 2: Then, click system restore. Now select the restore point to which you want to restore your system. Then, follow the on-screen instructions to finish the task.
There is another backup tool for you to perform the system restore — MiniTool ShadowMaker. It provides more features than the Windows built-in tool such as automatic backup, advanced backup options, etc. Download it now to have a try.
This post introduces 11 solutions for you to fix the “Firefox high CPU on Windows 10/11”. Besides, it will also provide reasons for the issue.
That is all information about OpenJDK platform binary. You can know what it is and how to fix the OpenJDK platform binary high CPU issue. If you want to fix the issue, but don’t know how to do it, you can try the above solutions one by one.
About The Author
Daisy graduated with a major in English and then joined MiniTool as an editor. She specializes in writing articles about backing up data & systems, cloning disks, and syncing files, etc. She is also good at writing articles about computer knowledge and computer issues. In daily life, she likes running and going to the amusement park with friends to play some exciting items.
6 Ways to Fix OpenJDK Platform Binary High CPU Usage
OpenJDK Platform binary or Java(TM) Platform SE binary or javaw.exe is the Java environment that is required for games like Minecraft and some other apps. So, whenever you run such games or applications, this process also launches alongside.
This process can show high CPU usage if the root application runs this process continuously. It can happen because of the limitation of the app or your system. Also, bugs within the apps can cause the process to use more CPU than necessary.
Usually, this process handles the graphics assets. So you need to make sure the CPU doesn’t perform very intensive graphical processing in such cases.
Table of Contents
Use Dedicated Graphics
Usually, this issue arises from the integrated graphics processor on the CPU handling all the graphics tasks of the OpenJDK Platform binary process instead of the dedicated GPU.
So, if you have both integrated and dedicated GPUs, you need to have this process use the dedicated graphics processor to reduce the load on the CPU.
- Open the Task Manager by pressing Ctrl + Shift + Esc.
- Go to the Details tab and search for javaw.exe (the executable process for OpenJDK Platform binary)
- Right-click on it and select Open File Location.
- On the file location, click on the address bar and copy the address.
- Press the Windows key + I to open Settings.
- Go to System > Display > Graphics.
- Under Add an app, set the drop-down box to Desktop app and click Browse.
- Click on the address bar on the Open file window and paste the address you copied earlier.
- Press Enter and then select javaw.exe . Click Add.
- Scroll down to and click on OpenJDK Platform binary. Then, select Options.
- Check High performance and hit Save.
You can also disable the integrated graphics card through the BIOS if simply assigning this process to the dedicated GPU doesn’t help.
Change Affinity and Priority of the Process
Another method you can try is to limit the number of logical CPU cores that run this process as well as reduce its priority. As such, you can free up more of the CPU reserves for other processes. You should also do this if you don’t have a dedicated GPU on your computer.
- Open the Task Manager and go to the Details tab.
- Right-click on javaw.exe and select Set Affinity.
- Uncheck all but one or two logical CPU processors. If you have 8 or more CPUs on the list, you can enable more but don’t enable all the logical processors.
- Click OK.
- Then, right-click on javaw.exe again.
- Hover over Set priority and select Below normal.
Update Graphics Drivers
Suppose the OpenJDK Platform binary is causing a high load on the graphics card, integrated or otherwise. In that case, your CPU will naturally need to use a lot of its processing capabilities as well.
This issue is further compounded if some driver issues prevent the graphics card from working properly. So, you should always update them to the latest version.
I recommend downloading the latest graphics driver from the manufacturer’s website and then installing it instead of using the Device Manager.
For NVIDIA Drivers
- Go to NVIDIA’s Driver Download webpage and enter your driver and OS details.
- Click on Search and after it shows the driver, click Download.
- Run the downloaded .exe file and follow the on-screen instructions.
For AMD Drivers
- Go to AMD’s support page.
- Search for or select your graphics processor from the list and click Submit.
For Intel Drivers
- Go to Intel’s Download Center.
- Select Graphics and search for your graphics driver.
- Click on Download next to it and run the setup after that.
- Follow the on-screen instructions.
Change In-App Settings
The high CPU usage may not be a result of some software inconsistencies, but actually due to the limitations of your system. If you have a low-spec system, the CPU may not be able to fully handle all the processing that OpenJDK Platform binary needs.
In such cases, you need to modify the root application’s settings to minimize the CPU requirement. For instance, in Minecraft, you can reduce the rendering distance or limit the FPS to 60.
You can also seek help from the app’s official forums on the app-specific solutions you can perform whenever you encounter this issue.
It is also possible that the current Java version of your system has some bugs that use up more of the CPU’s processing capacity than necessary. You should update Java whenever possible to prevent such issues.
from the official websites.
- Then, run the installer and follow the onscreen instructions.
This issue can also occur due to some errors in the current application. So, it’s usually better to update the program whenever you encounter any issues with it.
You can actually try reinstalling the application altogether. It will remove all the bugs in the current software and you can install the most updated version at the same time.
- First, you have to uninstall the application.
- Open Run.
- Type appwiz.cpl and press Enter. It will lead you to Programs and Features.
- Select the app and then click Uninstall.
- Follow the on-screen instructions.
- After that, download and install the latest Java on your system.
- Then, download the latest version of the actual application from its official website and install it.
Everything you need to know about open JDK platform binary
If you often use Java-based software, you might be familiar with OpenJDK however, a lot of Java users don’t know what it is or how it functions. This is why it is no surprise that the Open JDK Platform Binary as well as its parts are often ignored. So, this is the ideal place to learn the basics of the Java platform binary OpenJDK as well as its Platform Binary.
Sun Microsystems’ Java SE Platform Edition is included in the OpenJDK project that is open source and free of charge. Oracle Corporation first created something in 2006 as part of their efforts to implement the Java Community Process (JCOP). Oracle first published OpenJDK in 2008 underneatunderGeneral Public License (GPL), which enabled unlimited distribution and program modification. Since then many more organizations have likely participated in this project. such as Azul Systems, IBM, Red Hat, SAP, SUSE Linux, as well as other companies.
The OpenJDK project has been around since 2007, however, it was in 2013 that they made the choice to launch the Platform Binary, furthermore identified as the OpenJDK Runtime Environment, or JRE. Since it combines the classes needed to run your applications, when they are referring to JRE, the executor environment people actually refer directly to JVM itself. This OpenJDK Project will give updated information regularly (ODK). The ODK is an extensive set of tools that assist in the development and testing of the latest JVM capabilities and improvements.
What is the other way to use OpenJDK Perform?
Similar to different JVMs, OpenJDK operates similarly. The first step is to create the Class file (.class) using Java. Then , you can make use of ld to join the. classes files. The software created is then executed. The most significant difference between the open JDK platforms binary as well as the other JVMs has to do with the fact that there is no standard library out of the box. Additionally, it uses third-party applications such as Bouncy Castle, Apache Harmony and many more. The ODK includes every one of the modules.
Why would you want to OpenJDK?
Confidentiality, efficiency, and Licence are the three main factors that guide managers to use OpenJDK instead of the proprietary JVMs offered by Oracle and other companies.
Always be conscious that OpenJDK is created using the same software that is used in Oracle’s proprietary JVM If privacy concerns concern you. Therefore, you don’t have to be concerned about installing new software that will protect your computer.
As mentioned previously, OpenJDK mainly depends on external libraries. Some of them actually are licensed under GPL licenses. This means that using other libraries is not subject to royalty checks. In addition, several libraries were made in their native languages, including C++, C and many others. They are far superior to Java-based software as a consequence.
It is possible to continue using OpenJDK for free , as in compliance with the GPL’s limitations. If you want to buy a professional license then you are permitted to use the JDK as well as the JRE together with the ODK.
Is OpenJDK Free of Errors?
Yes, but there are a few disadvantages for those who use OpenJDK. One issue that often is faced by users of the OpenJDK Platform Binary is the fact that it can consume the entirety of the CPU, which could cause your computer to overwork and cause a slowdown to important components. However, there isn’t any thing that can be addressed to solve this issue as it’s a function of a similar to that of the Java program language.
What is the reason why the Open JDK Platform Binary keep the opening frozen and consuming a lot of RAM?
If the Daemon operation has to be stopped earlier than 3 hours, you should or destroy the operation with your Windows version or follow an alternative method, the Gradle stop instruction. The stop swap is a command to Gradle to require that all active Daemon mechanisms that are associated with the same Gradle version, irrespective of how the authority operated was to stop the individual.
These methods will allow you to completely deactivate it
The lengthy Gradle daemon can be also disabled with the –no-daemon command-line alternative or by inserting org.Gradle.daemon=false to your gradle properties directory. For more information, read on the various ways to disable (and start) the daemon by reading the Daemon FAQ that is significantly less. Here is a brief description of the daemon’s importance for its effectiveness.
Certain advantages that are part of Gradle Daemon
Daemon Daemon is a long-running process that allows us to save information about projects management frameworks and processes, folders, and more, as well as eliminating the cost of JVM restarting for every single construction. The reason is simple that you can speed up updates by using calculations made from previous runs. The benefits, however, are significant. On subsequent deployments we typically see construction times reduced by 15 to 25%. To gauge the amount of impact on the Gradle Daemon can still have on your development, we recommend the benchmarking of your work using the profile option.
What’s lacking from OpenJDK?
Certain components are missing from OpenJDK when compared with the Oracle JDK that was also launched prior to Java 11. Its components, the Applet Browser Plugin, Java Web Start as well as JavaFX are the most obvious of these. As mentioned previously, OpenJFX is a different OpenJDK project that is related to JavaFX. The other ones are still unveiled. There are many options for OpenJDK Redistribution of binary data like the variety that exist of various Linux distributions to choose (Ubuntu, Debian, Red Hat etc. ).
Our Zulu versions for OpenJDK are also provided by Azul at no cost and with paid support through Azul Platform Core. The majority of releases are tested on TCKs; OpenJDK 6 is the only that is not (as the TCK isn’t currently available). In the course of its existence, the opinions regarding the development of Java programming language also developed.
Although Jthe ava SE Group Of experts does not currently include the additions or deletions of Java SE releases, the description of the features included in each release is published via a JSR. Alternately, JDK Enhancement Recommendations in OpenJDK are employed to manage the issue (JEPs). JEPS is a collection of examines, sorts, and reviews suggestions to improve JDK improvements. JEP 1 provides a full explanation of the JEP concepts.
Minimum of three timelines for future JDK functionality is the kind of thing JEPs are designed to provide. Additionally, it isn’t designed for all the possible JEPs to be included in the JDK. In the end, OpenJDK is a broad spectrum of services. It provides customers with the programming language that is required to provide an extensive selection of options to develop their apps. In addition, it provides an open and friendly framework to define the Java platform’s future development.
So what is it?
The place to collaborate to create an open Java Platform, Standard Edition solution. Get the most up-to-date to submit JDK through download it. JDK.java.net/18 host Oracle’s business product JDK 18 binaries, which are built on the same codebase. It is also the GPL-licensed and free open source platform producing OpenJDK JDK 18. Binary blobs of binary available for Linux, macOS, and Windows.
Learn about the most difficult tasks that are currently being undertaken by the community, including Valhalla (primitive various kinds of and specific generic medicines), Amber (cultural or functional linguistics), Loom (ultra-light concurrency), Panama (abroad functional areas and statistics from abroad) and, of course, the forthcoming release of Java and JDK. In the OpenJDK Community You can test here with JDK as a whole.
Check sources, copy an original source to create an individual version, include a patch that will fix any flaws, improve the functionality of an existing item or add another option. However, OpenJDK includes more than.
A specification created through the Java Community Process defines Java technology (JCP). It is the only Java Specification Requirement with each version of Java Standard Edition (SE) (JSR). With each JSR the group of experts develops three different requirements for projects:
- The Technology Compatibility Kit (TCK) can verify that configurations that meet the criteria match with the configuration.
- In the case of Java SE, this corresponds to the Java Compatibility Kit (JCK) however, the majority of people refer to it only by the TCK. The description is a part from the Java Language Specification, the Java Virtual Machine Specification, however, it also contains Java Docs for things like the deemed necessary objects and classes.
- A Reference Implementation that demonstrates how the standard can actually be implemented, has been used as the appropriate OpenJDK project for all versions with the exception of Java SE 7.
Although every Java version’s architecture is as well in OpenJDK however, it is essential that any application created with OpenJDK code is tested with respect to the TCK and pass all its tests. Even the smallest of factors, like the version of the compiler used or the parameters for its functions could result in significant errors in the created binaries that fail one or more tests. However the TCK-tested accessible JDK platform binary provides you with the highest level of confidence that it is compatible with other TCK-certified version (though there is no test script that can be exhaustive).
The leadership of Sun Microsystems, the company who developed the initial version of Java decided to make the code base of the network with a full-access license in 2006. A number of Java users have also requested this, which was only one of the factors which influenced this decision. Around a year earlier Apache Harmony was launched. Apache Harmony project had been established with the purpose of offering an open Java solution.
Sun management has decided it was proper for them to make use of the most reliable resource. At the JavaOne conference in 2006, the first announcements were made. The year, excluding libraries, vast majority in the HotSpot virtual environments and translator code was made public under the GNU Public License (GPL).
In addition, it is essential to recognize that HotSpot is the JVM that is included with each OpenJDK output produced. While the Oracle JDK is also a part of the HotSpot VM, it could be due to the fact that it is part of OpenJDK however, contrary to popular perception, HotSpot is not the identical to Oracle JDK. Oracle JDK. Therefore it is it is the HotSpot VM is used by any unaltered version of OpenJDK. The majority of JDK class software libraries were made accessible (under the same licensing) on May 8 2007 which led to the development of the OpenJDK project. Many of the sealed components Sun had no permission to actually have existed however, they were made obsolete. The OpenJDK 7 announcement of building 53 allowed for the full build the JDK by using transparent technology.
While every Java version’s architecture is part of OpenJDK However, it’s essential that any deployment likely to be developed using OpenJDK code be tested in conjunction with the TCK and satisfy all its specifications. While they may seem insignificant, factors like the type of language used or the parameters for its functions can lead to significant problems with the created malware failing one or perhaps more tests. However an Open JDK software gives you a significant degree of confidence in its interoperability with another TCK-certified software (even although no test plan is completely comprehensive).
The entire Java Developer Kit’s software is accessible in OpenJDK however it is a binary version of JDK is required to run applications that are presumably translated in native machine codes. There aren’t any packaged binaries that have been pre-built for OpenJDK.
When customers are frequently faced with an error message such as “Java Platform SE binary has quit operating,” your graphics processor could be outdated or damaged it’s possible that there’s an issue between your Software library and the driver. Therefore, you should upgrade the driver for your graphics card before determining whether the issue can be solved.
The licensing process, also known as approval, is the area where OpenJDK as well as Oracle JDK diverge the most. OpenJDK is an GNU General Public Licence-compliant Java toolkit for development. According to the terms of the Oracle Binary Code License Agreement, Oracle JDK needs a trade license. As for pricing and assistance as well, there are many other options.