What should I do if the java environment variables do not take effect after being configured?

The solutions are: 1. Restart the terminal or command prompt window; 2. Check the spelling and path of the environment variable; 3. Make sure the environment variable is in the correct configuration file; 4. Check if there are other Java environment variables Conflict; 5. Check whether the Java installation is complete; 6. Check whether the system has duplicate Java installations; 7. Check whether there are other Java-related directories in the system path; 8. Try to manually execute the Java command. Detailed introduction: 1. Restart the terminal or command prompt window: After modifying the environment variables, make sure to close the current terminal, etc.

Operating system for this tutorial: Windows 10 system, Dell G3 computer.

If you still find that the Java environment variables do not take effect after configuring them, there may be several reasons for this. The following are some suggestions, I hope they can help you solve the problem:

1. Restart the terminal or command prompt window:

After modifying the environment variables, make sure to close the current Terminal or Command Prompt window and reopen a new window. Sometimes, changes to environment variables need to take effect in a new session.

2. Check the spelling and path of the environment variable:

Make sure the value of the JAVA_HOME variable is the correct Java installation directory path, and %JAVA_HOME% is added to the PATH variable \bin (on Windows) or $JAVA_HOME/bin (on Unix/Linux).

Pay attention to capitalization and make sure there are no extra spaces or spelling errors.

3. Make sure the environment variables are in the correct configuration file:

On Unix/Linux systems, make sure the export statement is in the correct configuration file (for example ~/. bashrc or ~/.bash_profile). Then run source ~/.bashrc or source ~/.bash_profile to apply the changes.

4. Check whether there are conflicts with other Java environment variables:

There may be definitions of other Java environment variables, which may be in other configuration files or in the global configuration of the system. in the file. Make sure there are no conflicting definitions.

5. Check whether the Java installation is complete:

Make sure you have correctly installed the Java Development Kit (JDK) and not only the Java Runtime Environment (JRE). The javac command is used to compile Java code and is only included in the JDK.

6. Check whether there are duplicate Java installations on the system:

Make sure there are no multiple Java versions installed on the system. Occasionally, the system may use an older version instead of the new version you configured.

7. Check whether there are other Java-related directories in the system path:

Make sure there are no other Java-related directories in the system path, which may affect Java Parsing of commands.

8. Try to manually execute the Java command:

Open a terminal or command prompt window and manually enter the java -version and javac -version commands to ensure correct recognition. Java.

If you still encounter problems after trying the above steps, it is recommended to carefully check each step to ensure that there are no omissions or errors, and to ensure that your system and environment meet the requirements of the configuration.

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