如何删除Java 10？React Native开发Java版本降级求助

Hey there! I’ve been in your exact situation when setting up React Native—Java 8 is a hard requirement for building Android apps with RN, so let’s walk through removing Java 10 properly across different operating systems.

macOS Steps #

• First, confirm your current Java version to make sure you’re targeting the right installation:

  java -version
  

• Head to the JVM installation directory: /Library/Java/JavaVirtualMachines/
  • You’ll find a folder named something like jdk-10.x.x.jdk—drag this to your Trash, or use the terminal to delete it permanently:

    sudo rm -rf /Library/Java/JavaVirtualMachines/jdk-10*.jdk
    

• Check for leftover environment variables: Open your shell config file (either ~/.bash_profile, ~/.zshrc, or ~/.profile depending on your shell) and delete any lines that set JAVA_HOME to the Java 10 path.
• Install Java 8: Grab the official Java 8 JDK installer and follow the on-screen prompts to complete setup.

Windows Steps #

• Open Control Panel > Programs > Programs and Features
• Locate Java SE Development Kit 10 in the list, right-click it, and select Uninstall
• Clean up environment variables:
  1. Right-click This PC > Properties > Advanced System Settings > Environment Variables
  2. Under System Variables, find JAVA_HOME—if it points to your Java 10 installation, delete it (you’ll set it to Java 8 later)
  3. In the Path variable, remove any entries that point to Java 10’s bin folder
• Restart your computer to apply changes, then install Java 8 using the official installer.

Linux (Ubuntu/Debian) Steps #

• List all installed Java versions to confirm Java 10’s presence:

  sudo update-alternatives --list java
  

• Uninstall Java 10 packages:
  • For OpenJDK:

    sudo apt-get remove openjdk-10-jdk openjdk-10-jre
    

  • For Oracle Java:

    sudo apt-get remove oracle-java10-installer
    

• Clean up unused dependencies:

  sudo apt-get autoremove
  

• Install Java 8 and set it as the default:

  sudo apt-get install openjdk-8-jdk openjdk-8-jre
  sudo update-alternatives --config java
  

  When prompted, select the number corresponding to Java 8 to set it as your default version.

Final Check #

After installing Java 8, run these commands to confirm everything is set up correctly:

java -version
javac -version

Both should show a version starting with 1.8.x—that means you’re ready to start building React Native Android apps!

内容的提问来源于stack exchange，提问作者Vũ Nguyễn Duy