Book Image

Java Fundamentals

By : Gazihan Alankus, Rogério Theodoro de Brito, Basheer Ahamed Fazal, Vinicius Isola, Miles Obare
Book Image

Java Fundamentals

By: Gazihan Alankus, Rogério Theodoro de Brito, Basheer Ahamed Fazal, Vinicius Isola, Miles Obare

Overview of this book

Since its inception, Java has stormed the programming world. Its features and functionalities provide developers with the tools needed to write robust cross-platform applications. Java Fundamentals introduces you to these tools and functionalities that will enable you to create Java programs. The book begins with an introduction to the language, its philosophy, and evolution over time, until the latest release. You'll learn how the javac/java tools work and what Java packages are - the way a Java program is usually organized. Once you are comfortable with this, you'll be introduced to advanced concepts of the language, such as control flow keywords. You'll explore object-oriented programming and the part it plays in making Java what it is. In the concluding chapters, you'll get to grips with classes, typecasting, and interfaces, and understand the use of data structures, arrays, strings, handling exceptions, and creating generics. By the end of this book, you will have learned to write programs, automate tasks, and follow advanced courses on algorithms and data structures or explore more advanced Java courses.
Table of Contents (12 chapters)
Java Fundamentals

Best Practices

While learning about exception handling and its statements, mechanics, and classes is required to use it, for most programmers this may not be enough. Usually, this set of theoretical information needs practical experience of various cases to get a better feel for exceptions. In this regard, some rules of thumb about the practical use of exceptions are worth mentioning:

  • Do not suppress exceptions unless you really handled them.

  • Inform the user and let them take responsibility unless you can fix things silently.

  • Be aware of the caller's behavior and don't leak exceptions unless it is expected.

  • Wrap and chain with more specific exceptions when possible.

Suppressing Exceptions

In your function, when you catch an exception and do no throw anything, you are signaling that you took care of the exceptional case and you fixed the situation so that it is as if that exceptional case had never happened. If you cannot make such a claim, then you should not have suppressed that exception.