SDKMAN!

Step 1: Install the required Java version using `sdk install java <version>`

Step 2: Set the specific Java version as the default for the project using `sdk use java <version>`

Step 3: Compile and run the legacy application.

Step 4: Switch back to a newer Java version for other projects using `sdk default java <newer_version>`

Step 1: Install multiple Java versions using `sdk install java <version1>`, `sdk install java <version2>`

Step 2: Run the application with each Java version using `sdk use java <version>` followed by the application execution command.

Step 3: Analyze the application's performance and identify any compatibility issues.

Step 4: Document and address any observed differences across JVMs.

Step 1: Identify the required SDK version for each project.

Step 2: Install the necessary SDK versions using `sdk install <candidate> <version>`.

Step 3: Use the `sdk use <candidate> <version>` command to switch to the appropriate SDK version when working on each project.

Step 4: Ensure that the correct SDK version is active before building or running the project.

Step 1: Install the new SDK release using `sdk install <candidate> <new_version>`.

Step 2: Set the new SDK version as the current version using `sdk use <candidate> <new_version>`.

Step 3: Run tests and evaluate the new SDK release in a controlled environment.

Step 4: If the new SDK release is satisfactory, set it as the default version using `sdk default <candidate> <new_version>`.

Step 1: Identify the required SDK version for the open-source project.

Step 2: Install the necessary SDK version using `sdk install <candidate> <version>`.

Step 3: Switch to the project's SDK version using `sdk use <candidate> <version>`.

Step 4: Build, test, and contribute code, ensuring compatibility with the specified SDK version.