difference between java 8 and java 15
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sure! let's explore the key differences between java 8 and java 15, focusing on features, improvements, and enhancements. we will cover important changes and provide code examples where applicable.
overview of java versions
**java 8**: released in march 2014, java 8 introduced significant language enhancements, including lambdas, the stream api, the optional class, and new date and time api.
**java 15**: released in september 2020, java 15 introduced new features, enhancements, and performance improvements, including text blocks, sealed classes, and improvements to the garbage collector.
key differences
1. *lambdas and functional interfaces* (java 8)
java 8 introduced lambda expressions that allow users to implement functional interfaces in a more concise manner.
*example in java 8:*
2. *streams api* (java 8)
java 8's stream api allows you to process sequences of elements in a functional style.
*example in java 8:*
3. *optional class* (java 8)
the `optional` class provides a way to avoid `nullpointerexceptions`.
*example in java 8:*
4. *text blocks* (java 13 as a preview feature, finalized in java 15)
text blocks allow multi-line string literals, improving readability.
*example in java 15:*
5. *sealed classes* (java 15)
sealed classes allow you to control which classes can extend or implement them.
*example in java 15:*
6. *pattern matching for `instanceof`* (java 14 as a preview feature, finalized in java 16)
this feature simplifies the code by combining `instanceof` checks with type casting.
*example in java 15:*
7. *new garbage collectors* (java 9+)
java 9 introduced the g1 garbage collector as the default, and java 15 improved it further.
*example of g1 gc tuning (java 15):*
summary of key features
| feature | java 8 | java 15 |
|-----------------------|---------------------------------|----------------------------------|
| lambd ...
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