Mistakes are good but there are some mistakes which you should avoid be they in real-life or coding. As a developer, there are some mistakes that should be avoided to implement an efficient application.
Since Java is the popular programming language for building applications, this video talks about the 5 mistakes which you should avoid as a Java developer & will give you clarity on how to avoid them
For more details, please go through - 10 Most Common Mistakes That Java Developers Make