🧼 How to Cleanly Remove Snap Java and Install OpenJDK via APT on Ubuntu

Switching from Snap to APT for Java is a smart move for developers who want stability, better toolchain compatibility, and easier configuration. Keep your setup lean and professional by relying on the APT-managed OpenJDK. My gist path file : https://gist.github.com/Kvnbbg/735c4b35f8400e3b93c48104984938e3

We skipped adding JAVA_HOME in this guide for simplicity. But if you need to set it later (e.g., for Android SDK or Maven), feel free to ask or check out below:
👉 How to Set JAVA_HOME on Ubuntu :

# Step 1: Remove Snap version cleanly (if installed)
sudo snap remove openjdk

# Step 2: Clean any leftover APT attempts or broken packages (if any)
sudo apt autoremove --purge -y
sudo apt clean

# Step 3: Update package list
sudo apt update

# Step 4: Install the latest LTS OpenJDK from Ubuntu's repos
sudo apt install openjdk-21-jdk -y

# Step 5: Verify installation
java -version
javac -version

# Step 6 (Optional but recommended): Set JAVA_HOME permanently
echo 'export JAVA_HOME="/usr/lib/jvm/java-21-openjdk-amd64"' >> ~/.bashrc
echo 'export PATH="$JAVA_HOME/bin:$PATH"' >> ~/.bashrc
source ~/.bashrc

🎯 Result

You now have:

• A clean Java installation with no Snap interference
• System-wide compatibility with development tools like Eclipse, IntelliJ, Maven, Gradle, and Android Studio
• A reliable OpenJDK version maintained via Ubuntu’s APT system

📌 Why Remove Snap Java?

While Snap packages are convenient, they sometimes create issues with:

• File paths not being standard (/snap/...)
• JAVA_HOME configuration problems
• Confined environments that limit system integration
• Compatibility issues with IDEs like Eclipse or IntelliJ

To avoid all this, using the official APT method is cleaner and more predictable—especially for developers.