What is the correct way to set Java environment variables in Mac OS?

It is very important to set Java environment variables in Mac operating system, because it can help us run Java programs normally in the terminal. This article will introduce how to correctly set Java environment variables and provide specific code examples.

Setting Java environment variables on Mac can be achieved by modifying the .bash_profile file. The .bash_profile file is a hidden file located in the root directory of the user folder and is used to store configuration information for the terminal environment.

The following are the specific steps:

Step 1: Open the terminal

First, we need to open the terminal. The terminal can be found in the "Utilities" directory under the "Applications" folder.

Step 2: Edit the .bash_profile file

Enter the following command in the terminal to open the .bash_profile file:

nano ~/.bash_profile

If you have not created the .bash_profile file, the terminal will automatically Create a new one.

Step 3: Add Java environment variable

In the opened .bash_profile file, add the following lines of code:

export JAVA_HOME=$(/usr/libexec/java_home)
export PATH=$JAVA_HOME/bin:$PATH

The first line is to set the JAVA_HOME environment variable, which points to Java installation directory.

The second line is to add the bin directory of the Java installation directory to the system's environment variable PATH. In this way, when you enter the java or javac command in the terminal, the system can correctly find the Java executable file.

Step 4: Save and exit the .bash_profile file

Press the Ctrl X key combination, then press the Y key to confirm the save, and finally press the Enter key to exit.

Step 5: Make the environment variables take effect

Enter the following command in the terminal to make the modified .bash_profile file take effect:

source ~/.bash_profile

Now, the Java environment variables have been correctly set Set up.

In order to verify whether the environment variable is set successfully, you can enter the following command in the terminal to check the Java version information:

java -version

If the Java version information can be output, the environment variable is set successfully.

The above is how to correctly set Java environment variables in the Mac operating system.

I hope the content of this article can help you. If you have any questions, please feel free to ask.

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