Install SDKMAN!

Installation of SDKMAN! Package Manager

SDKMAN! is a tool for managing parallel versions of multiple Software Development Kits (SDKs) on Unix-based systems.

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Prerequisites

Ensure that you have curl and zip installed on your system before proceeding.

Ubuntu/Debian-based Systems

To install curl and zip, run:

sudo apt install curl zip unzip -y

Manjaro (Arch-based Systems)

For Manjaro, install the required dependencies using:

sudo pacman -Syu curl zip unzip --noconfirm

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Installing SDKMAN!

Once the prerequisites are installed, install SDKMAN! using the following command:

curl -s "https://get.sdkman.io" | bash

After the installation is complete, open a new terminal or initialize SDKMAN! manually with:

source "$HOME/.sdkman/bin/sdkman-init.sh"

To verify that SDKMAN! is installed correctly, run:

sdk version

If successful, you should see output similar to:

script: 5.18.2
native: 0.4.6

For more details, refer to the official SDKMAN! installation guide.

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Installing a Specific Java Version

To list all available Java versions, run:

sdk list java

This command will display a list of available Java versions. Copy the identifier from the Identifier column of your preferred version.

For example, to install Java 21.0.4-tem, use:

sdk install java 21.0.4-tem

During installation, you may be prompted to set this version as the default. Choose n if you do not want to make it the default version.

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Automated Installation Script for SDKMAN! and Java

To automate the installation of SDKMAN! and a Java version, you can use the following script. This script:

✅ Detects the OS (Ubuntu/Debian or Manjaro/Arch-based)
✅ Installs required dependencies (curl, zip, unzip)
✅ Installs SDKMAN!
✅ Prompts the user for a Java version and installs it

Installation Script

Save the following script as install_sdkman.sh:

#!/bin/bash

# Automated SDKMAN! Installation Script
# Supports Ubuntu/Debian and Manjaro (Arch-based) systems

set -e  # Exit on error

# Function to check OS type
detect_os() {
    if [ -f "/etc/os-release" ](/lightblueseas/linuxstuff/wiki/--f-"/etc/os-release"-); then
        . /etc/os-release
        echo "$ID"
    else
        echo "Unsupported OS"
        exit 1
    fi
}

# Function to install dependencies
install_dependencies() {
    local os_type=$1
    echo "Installing dependencies..."

    case "$os_type" in
        ubuntu|debian)
            sudo apt update && sudo apt install -y curl zip
            ;;
        manjaro|arch)
            sudo pacman -Syu --noconfirm curl zip
            ;;
        *)
            echo "Unsupported OS detected."
            exit 1
            ;;
    esac

    echo "Dependencies installed successfully."
}

# Function to install SDKMAN!
install_sdkman() {
    echo "Installing SDKMAN!..."
    curl -s "https://get.sdkman.io" | bash

    # Initialize SDKMAN!
    source "$HOME/.sdkman/bin/sdkman-init.sh"

    # Verify installation
    if sdk version; then
        echo "SDKMAN! installed successfully."
    else
        echo "SDKMAN! installation failed."
        exit 1
    fi
}

# Function to install a specific Java version
install_java() {
    local java_version=$1
    echo "Installing Java version: $java_version..."
    
    sdk install java "$java_version"

    echo "Java $java_version installed successfully."
}

# Detect OS
OS_TYPE=$(detect_os)
echo "Detected OS: $OS_TYPE"

# Install dependencies
install_dependencies "$OS_TYPE"

# Install SDKMAN!
install_sdkman

# Prompt for Java version installation
read -p "Enter Java version to install (e.g., 21.0.4-tem): " JAVA_VERSION
if [ -n "$JAVA_VERSION" ](/lightblueseas/linuxstuff/wiki/--n-"$JAVA_VERSION"-); then
    install_java "$JAVA_VERSION"
else
    echo "Skipping Java installation."
fi

echo "Installation process completed successfully!"

How to Use the Script

1. Save the script to a file:

   nano install_sdkman.sh
   

   Paste the script into the file and save it (CTRL+X, then Y, then ENTER).

2. Make the script executable:

   chmod +x install_sdkman.sh
   

3. Run the script:

   ./install_sdkman.sh
   

This script ensures that SDKMAN! and the Java version of your choice are installed correctly and configured properly. 🚀

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