Once Java is installed, launching an application (usually a .jar file) is simple. You can usually double-click the file to run it. If it doesn't open, right-click the file, select and choose "Java Launcher."
This guide covers everything you need to know about downloading and installing a Java launcher on your Mac, from choosing the right version for your processor to setting your environment variables. Determine Your Mac Processor
💡 Keep your Java version updated. Java frequently releases security patches. On a Mac, you can check for updates in System Settings > Java (at the bottom of the sidebar), which opens the Java Control Panel.
You need the "macOS ARM64" installer. Intel Processor: You need the "macOS x64" installer.
Some very old Mac applications require Java 6 or 8. If you are prompted to install "Legacy Java SE 6," be careful, as these versions have security vulnerabilities. Try to find a modern update for the app first. Launching Java Applications