Here are some steps you can take to start learning Java from scratch:

Install the Java Development Kit (JDK) on your computer. This will allow you to run and develop Java programs.

Begin by learning the basics of Java syntax and programming concepts such as variables, data types, loops, and control flow statements. You can find many tutorials and resources online to help with this step.

Get familiar with Eclipse or IntelliJ IDEA, which is a popular Java development environment. These IDEs provide features such as code completion, debugging, and version control.

Start practicing by writing small programs and experimenting with the language. Try to solve simple problems and implement basic algorithms.

As you progress, learn about more advanced concepts such as object-oriented programming, collections, and concurrency.

Practice, practice, practice! As with any programming language, the more you practice, the more comfortable you will become with the language and its features.

Finally, join online communities or forums where Java developers share their knowledge and experience.
This can be a great way to learn from others and stay up-to-date with the latest developments in the Java ecosystem.