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head first java is a popular book written by kathy sierra and bert bates. the book is designed to help beginners learn java programming in a fun and engaging way. the third edition of the book covers the fundamentals of java programming and provides hands-on exercises and examples to help readers understand the concepts.

here is a summary of the introduction to head first java 3rd edition:

the book starts by introducing the basics of java programming, including data types, control structures, and object-oriented programming concepts.
it covers important topics such as classes and objects, inheritance, polymorphism, and interfaces.
the book also delves into more advanced topics like exceptions handling, i/o streams, and networking.
throughout the book, readers are encouraged to think like a programmer and solve problems using java.

now, let's look at an example code snippet in java demonstrating the use of the `return` statement:



in this example, we have a simple java program that defines a method `sum` which takes two integers as parameters and returns their sum. the `main` method calls the `sum` method with arguments 5 and 3, and then prints out the result.

the `return` statement is used in the `sum` method to return the sum of the two numbers back to the caller. this is a fundamental concept in java programming, as it allows methods to return values to the code that called them.

overall, head first java is a great resource for beginners to learn java programming, and the third edition continues to be a popular choice for those looking to get started with java.

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