How to configure jdk environment variables in java

How to configure jdk environment variables in java: 1. Download the JDK installer and run the installation; 2. Find the JDK installation path; 3. Open the system property settings; 4. Configure the environment variables; 5. Configure the JAVA_HOME variable; 6 , configure the Path variable; 7. Verify the configuration.

Java is a cross-platform programming language. In order to be able to run and develop Java programs, we need to configure a Java development environment on the computer. Among them, configuring JDK environment variables is an important step in configuring the Java development environment. This article will introduce readers to how to configure JDK environment variables on Windows and Mac operating systems.

1. Configure JDK environment variables on Windows operating system

- The first step is to download the JDK installer and run the installation. Go to Oracle's official website (https://www.oracle.com/java/technologies/javase-jdk15-downloads.html) to download the latest version of the JDK installer suitable for your operating system. Run the installation program and follow the installation wizard to complete the installation.

- The second step is to find the JDK installation path. The default installation path is C:\Program Files\Java\jdk-. For example, if you install the JDK 15, the path is C:\Program Files\Java\jdk-15.

- The third step is to open the system property settings. On Windows operating systems, right-click "This PC" and select "Properties".

- The fourth step is to configure environment variables. In the system properties window, click the "Advanced System Settings" button, and in the pop-up dialog box, click the "Environment Variables" button.

- The fifth step is to configure the JAVA_HOME variable. In the "User Variables" or "System Variables" area, click the "New" button, enter "JAVA_HOME" as the variable name, and then copy the JDK installation path to the variable value.

- The sixth step is to configure the Path variable. Find the "Path" variable of the system variable, click the "Edit" button, and append ";%JAVA_HOME%\bin;%JAVA_HOME%\jre\bin;" at the end of the variable value.

- Step 7, verify the configuration. Open the command prompt and enter "java -version" and "javac -version" to view the version information of Java and compiler respectively. If the correct version information is displayed, the configuration is successful.

2. Configure JDK environment variables on Mac operating system

- The first step is to download the JDK installer. Go to Oracle's official website (https://www.oracle.com/java/technologies/javase-jdk15-downloads.html) to download the latest version of the JDK installer suitable for your operating system. After the download is complete, double-click to run the installation program and follow the instructions of the installation wizard to complete the installation.

- The second step is to find the JDK installation path. The default installation path is /Library/Java/JavaVirtualMachines/jdk-.jdk/Contents/Home. For example, if you install the JDK 15, the path is /Library/Java/JavaVirtualMachines/jdk-15.jdk/Contents/Home.

- The third step is to open the terminal. Click on the Finder application folder, find "Terminal" in the Utilities folder, and double-click to open it.

- The fourth step is to edit the bash_profile file. In the terminal enter "vim ~/.bash_profile", press the Enter key to open the bash_profile file.

- Step 5, configure environment variables. In the bash_profile file, press the "i" key to enter the edit mode, then enter the following content and save ：

export 
JAVA_HOME=/Library/Java/JavaVirtualMachines/jdk-<版本号>.jdk/Contents/Home
export PATH=$JAVA_HOME/bin:$PATH

- The sixth step is to make the environment variables take effect. Enter the "source ~/.bash_profile" command in the terminal and press the Enter key to make the environment variables take effect.

- The seventh step , verify the configuration. Enter "java -version" and "javac -version" command to view the version information of Java and compiler respectively. If the correct version information is displayed, the configuration is successful.

Through the above steps, you have successfully configured the JDK environment variables of the Java development environment. Now You can start writing and running Java programs. Please note that the JDK version number and installation path may change due to different JDK versions, so make sure to configure it according to the actual version you installed .

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