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sure! below is a comprehensive tutorial on java se 8 fundamentals, complete with explanations and code examples. since i can't create a pdf directly, i'll format the content in a way that you can easily convert it into a pdf later.

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java se 8 fundamentals

table of contents
1. introduction to java se 8
2. java se 8 features
lambda expressions
functional interfaces
streams api
default methods
optional class
3. java se 8 code examples
lambda expression example
streams api example
optional class example
4. conclusion

1. introduction to java se 8

java se 8, released in march 2014, introduced several new features and enhancements that improved the java programming language's capabilities. this version focused on improving developer productivity, adding functional programming capabilities, and enhancing the java collections framework.

2. java se 8 features

lambda expressions
lambda expressions enable you to treat functionality as a method argument, or to create a concise representation of a single method interface (functional interface).

*syntax of lambda expression:*


*example:*


functional interfaces
a functional interface is an interface that contains exactly one abstract method. they can be implemented using lambda expressions.

*example:*


streams api
the streams api allows for functional-style operations on streams of elements (e.g., collections). it provides a way to process data in a declarative manner.

*example:*


default methods
java se 8 allows interfaces to have default methods. this enables developers to add new methods to interfaces without breaking existing implementations.

*example:*


optional class
the `optional` class is a container object that may or may not contain a value. it helps to avoid `nullpointerexceptions` and provides methods to handle the presence or absence of values.

*example:*


3. java se 8 code examples

lambda expression example
...

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