Managing multiple versions of Java and related tools can be difficult and time-consuming. Enter SDKMAN!, a tool that allows users to easily install, select, and manage different versions of Java, as well as other development tools like Maven, Gradle, and VisualVM. With SDKMAN!, users can quickly switch between versions and have them available for use in the terminal or IDEs like IntelliJ IDEA and Eclipse. The tool also provides features like tab completion and automatic environment variable updates, making it easier to work with multiple versions of Java and related tools. By using SDKMAN!, developers can save time and reduce frustration when working with different versions of Java and other development tools.