Как установить jdk 18
The type of installation depends on your requirement and the platform that you choose to install.
Installation Requirements and Related Tasks
To develop or run Java applications, download and install JDK.
To understand the version-string scheme that is used to distinguish various JDK releases, see Version-String Format.
The JDK can be installed on the following platforms:
You can download the JDK from Java SE Development Kit Downloads page.
The JDK documentation is a separate download. See Java SE Documentation.
Installation of the JDK on Microsoft Windows Platforms: Instructions include steps to install the JDK on 64-bit Microsoft Windows operating systems.
Installation of the JDK on Linux Platforms: Instructions include installation from Archive files and Red Hat Package Manager (RPM).
Installation of the JDK on macOS: Instructions include steps to install the JDK on the macOS platform.
To learn about the files and directories that are created after JDK installation, see Installed Directory Structure of JDK.
Как установить jdk 18
For any text in this document that contains the following notation, you must substitute the appropriate update version number:
For example, if you are downloading the JDK installer for 64-bit systems for update 18 Interim 0, Update 0, and Patch 0, then the file name jdk- 18 . interim.update.patch _windows-x64_bin.exe becomes jdk- 18 _windows-x64_bin.exe .
JDK Installation Instructions for Windows
You run a self-installing executable file to unpack and install the JDK on Windows computers.
Install JDK on Windows computers by performing the actions described in the following topics:
Downloading the JDK Installer
Access the Java SE Downloads page and click Accept License Agreement . Under the Download menu, click the Download link that corresponds to the .exe for your version of Windows.
Download the file jdk- 18 . interim.update.patch _windows-x64_bin.exe .
Verify the successful completion of file download by comparing the file size on the download page and your local drive. Alternatively, you can ensure that the downloaded file’s checksum matches the one provided on the Java SE Downloads page.
Installing the JDK from the JDK .exe Installer
- Start the JDK 18 installer by double-clicking the installer’s icon or file name in the download location.
- Follow the instructions provided by the installer.
- After the installation is complete, delete the downloaded file to recover the disk space.
During installation, the following files are copied to the location mentioned:
Alternatively, you can run these executables directly from the JDK’s bin directory.
Installing the JDK from the MSI Enterprise Installer
The JDK MSI Enterprise Installer is packaged as a .msi installer and runs with minimal dialogs. It supports silent installation of the JDK and is customizable using command line parameters.
You must have administrative permissions install JDK 18 .
- Download jdk- 18 _windows-x64_bin.msi .
- Double click the .msi file to run the installer.
Installing the JDK from the Command Line
You can install the JDK by downloading the appropriate Oracle JDK MSI Enterprise Installer for your system and running it from the command line.
- Download jdk- 18 _windows-x64_bin.msi .
- Open an MS-DOS prompt with Administrative permissions.
- Run one of the following commands depending on the type of installation that you want to perform:
- Basic UI mode:
- Silent mode:
installer.msi is the name of the MSI Enterprise JDK Installer that you obtained in the previous step.
Creating a Log File
You can use a log file to verify that an installation succeeded.
To create a log file describing the installation, append /L C:\ path \setup.log to the install command and scroll to the end of the log file to verify.
The following is an example of creating a log file:
In this example, the log is written to the C:\ path \setup.log file.
Installing the JDK Silently
Instead of double-clicking or opening the JDK installer, you can perform a silent, non interactive, JDK installation by using command-line arguments.
- The notation jdk stands for the downloaded installer file base name, such as jdk- 18 _windows-x64_bin.exe .
- You don’t need to run the ADDLOCAL command anymore as everything gets installed by default.
Beginning to Use the JDK
Use the Java Development Kit in the Windows Start menu to access information related to Reference Documentation.
During JDK installation, Java menu items are added to the Windows Start menu to provide easy access to Reference Documentation, which is online documentation web page.
During JDK installation and uninstallation processes, the appropriate start menu items are updated so that they are associated with the latest JDK version on the system
Windows 10 has a Start menu; however, the menu is not available in Windows 8 and Windows 8.1. The JDK and Java information in Windows 8 and Windows 8.1 is available in the following Start directory: %ALLUSERSPROFILE%\Microsoft\Windows\Start Menu\Programs .
Uninstalling the JDK on Windows
Uninstalling the JDK in Silent Mode
You can use the command line for uninstalling the JDK.
For example, to uninstall JDK 18, run the command:
- This command can be run from anywhere.
- The msiexec.exe executable is located in the windows system directory.
- A reboot is required only if some files are in use during uninstallation; it is not necessary everytime. However, to manually suppress reboot while uninstalling, append REBOOT=R option to the command.
- Append /l “C:\< path >setup.log” option to the command if you want to create a log file describing the uninstallation status.
Windows Installer dialog appears prompting you for confirmation. Click Yes to uninstall JDK.
Finding the JDK Registry Key and UninstallString Value
- Go to Start and type regedit .
- In the Registry Editor, go to HKEY_LOCAL_MACHINE/Software/Microsoft/Windows/CurrentVersion/Uninstall .
Under the Uninstall folder, you will find many registry entries within curly brackets.
Highlight the Uninstall folder before performing search for a particular registry.
The registry key is highlighted on the right-hand side of the pane and values of various uninstall strings are displayed on the left-hand pane.
JDK Installation Troubleshooting
The topic provide tips for resolving issues while installing JDK.
System Error During Decompression
If you see the error message: system error during decompression , then there might not be enough space on the disk that contains the TEMP directory.
Program Cannot Be Run in DOS Mode
If you see the error message: This program cannot be run in DOS mode , then do the following:
Open the MS-DOS shell or command prompt window.
Right-click the title bar.
Select the Program tab.
Ensure that the item Prevent MS-DOS-based programs from detecting Windows is not selected.
Select OK again.
Exit the MS-DOS shell.
Restart your computer.
Characters That Are Not Part of the System Code Page
The associated bug number is 4895647.
Cleanup the Registry After a Failed JDK Uninstall
Sometimes, attempts to uninstall JDK through the Windows Add/Remove program leave behind some Java entries in the registry that are not fully removed. These left behind registry entries can cause problems in installing a new version of Java. The following are the methods to cleanup registry entries:
- Program Install and Uninstall troubleshooter (Recommended Method)
- Manual Registry Edit
Program Install and Uninstall troubleshooter (Recommended Method)
Run the Program Install and Uninstall troubleshooter to repair the corrupted registry keys that prevent programs from being completely uninstalled, or blocks new installations and updates.
Manually edit the registry (Use this only if the Fix It utility does not work)
Incorrectly editing your registry may severely damage your system. You should back up any valued data from your computer before making changes to the registry.
To save the registry key before deleting, in the menu bar, select File and then Export . In case you deleted the wrong registry key, you can restore the registry from your saved backup file by selecting from the menu bar File and then Import .
To delete the registry key:
Highlight the key, Right click and select Delete .
Click Yes when prompted.
The JDK gets uninstalled.
Fixing Shim Situation when JDK 18 and JRE 8 is Installed
When you install JDK 18 and then install JRE 8, and then run the java -version command, 1.8.0 is displayed in the output instead of 18 . This is because the javapath is placed before JDK 18 location in the user environment path.
This is a bug with the JRE 8 installer. To fix this shim situation, uninstall and reinstall JDK 18 .
Sorry, you have been blocked
This website is using a security service to protect itself from online attacks. The action you just performed triggered the security solution. There are several actions that could trigger this block including submitting a certain word or phrase, a SQL command or malformed data.
What can I do to resolve this?
You can email the site owner to let them know you were blocked. Please include what you were doing when this page came up and the Cloudflare Ray ID found at the bottom of this page.
Cloudflare Ray ID: 7a25b5974f2977ad • Your IP: Click to reveal 88.135.219.175 • Performance & security by Cloudflare
How To Install OpenJDK 18 On Windows
It provides all the steps required to install OpenJDK 18 on Windows 10 and get started with Java using the Hello World example.
This tutorial provides all the steps required to install OpenJDK 18 on Windows 10. The steps to install OpenJDK 18 on other versions of Windows should be similar to the steps explained in this tutorial.
You may also install the popular IDEs to develop Java applications by following — How To Install Eclipse For Java On Windows, How To Install IntelliJ IDEA for Java on Windows, and How To Install VSCode For Java On Windows. You may also follow the How To Install OpenJDK 18 On Ubuntu to install the latest OpenJDK on Ubuntu and How To Install Java 18 On Ubuntu to install Oracle JDK.
Step 1 — Download OpenJDK
Open the JDK 18 GA Release site and download the distribution for Windows as highlighted in Fig 1.
Click the zip download link as highlighted in Fig 1 to download OpenJDK for Windows. Also, verify your download using the given sha256 checksum.
Step 2 — Install OpenJDK
Extract the downloaded zip to the desired location. In my case, I have extracted the downloaded zip to C:\java\openjdk. The final path should be C:\java\openjdk\jdk-18.0.1.1.
This is the only step required to install OpenJDK on windows.
Step 3 — Set Environment Variables
In this step, we will configure the environment variables to use the OpenJDK from Command Prompt. Open Command Prompt and check the installed version of Java using the command java -version as shown in Fig 2.
It shows the version of Java 18 since my current version of Java is 18. In your case it might show another version of Java if it’s already installed, else it will show the message — Java is not recognized as internal or external command, operable program or batch file.
Right Click -> My Computer(This PC) -> Properties -> Advanced System Settings
The above steps will open the Windows Settings Panel as shown in Fig 3.
Now click the Environment Variables Button, select Path under the System Variables section, and click the Edit Button. We need to add the path of installed JDK to the system Path.
Click on the New/Edit Button and add/update the path to the installed JDK bin which is C:\java\openjdk\openjdk-18.0.1.1\bin in our case. You might be required to update the path if it already exists. It should look like Fig 4.
Press the OK Button 3 times to close all the windows. This sets the JDK 18 on system environment variables to access the same from the console.
Notes: Remove existing PATH values specific to previously installed Java. Also update JAVA_HOME, in case it was already set. Also, you might be required to remove the previously installed JDK from the Global Path as shown in Fig 5.
Now again open the console and test the Java version as shown in Fig 6. Make sure to use a new console to test the version of the newly installed OpenJDK 18.
It must show the OpenJDK version as shown in Fig 6. You might need to restart the system in case it does not reflect the JDK version installed by us.
Getting started with Java — Hello World
In this step, we will write, compile, and execute our first program in Java using the standard Hello World example.
Now write the first Java program as shown below, save the program as HelloWorld.java and exit the editor. Make sure that the class name and file name are the same.
Now open the command prompt and navigate to the path where you have saved your Java program. Use the below-mentioned commands to compile and execute the program.
These are the easy-to-install steps required to install OpenJDK on Windows and write and execute the Java program.