主题比较中心

Java 15 对比 Java 16

通过结构化对比表查看 Java 15 与 Java 16 的差异，然后继续浏览相关面试题、测验以及类似主题比较。

1 比较要点

2 相关比较

主题对比

Java 15 与 Java 16 的对比有助于你理解哪一种更适合自己的使用场景。这里也整理了 Java 16 和 Java 15 的常见对比内容，适用于面试准备。

比较概览

Java 15 与 Java 16 的区别

Java 15 与 Java 16 的对比有助于你理解哪一种更适合自己的使用场景。这里也整理了 Java 16 和 Java 15 的常见对比内容，适用于面试准备。

Java 15 本次并排比较中的主题一。

1 当前页面可用的比较条目。

Java 16 本次并排比较中的主题二。

Java 15 Interview Online Test	Java 16 Interview Online Test
Features Added: - Records: The record is a new type of class in Java that makes it easy to create immutable data objects. It was introduced in Java 14. Java 15 aims to refine a few aspects before becoming an official product feature. The class definition has a new syntax that is specific for records, allow us to override some of the default behaviors. - Sealed Classes: Java provides no fine-grained control over the inheritance. Sealed classes involve two new keywords â€” sealed and permits. These are to allow individual classes to declare which types may be used as sub-types. This also applies to interfaces and determining which types can implement them. Any class that extends a sealed class must itself be declared sealed, non-sealed, or final. - Hidden Classes: It is to allow the runtime creation of classes that are not discoverable. - Pattern Matching Type Checks: Here got few enhancement top of Java 14. The goal of this feature is to remove a lot of boilerplate code that typically comes with the instanceof operator. - Foreign Memory API: Foreign memory generally refers to memory that lives outside the managed JVM heap. Because of this, it's not subject to garbage collection and can typically handle incredibly large memory segments. A new VarHandle API, to customize memory access var handles. Support for parallel processing of a memory segment using the Spliterator interface. Enhanced support for mapped memory segments. Ability to manipulate and dereference addresses coming from things like native calls. - Garbage Collectors: In Java 15, both ZGC and Shenandoah will be no longer be experimental. Both will be supported configurations that teams can opt to use, while the G1 collector will remain the default.	Features Added: - Vector API: Java supports auto-vectorization to optimize the arithmetic algorithms, which means the Java (JIT compiler) will transform some scalar operations (one item at a time) into vector operations (multiple items at a time) automatically. Developers have no control of this vector operation conversion, it totally depends on the JIT compiler to optimize the code. - Enable C++14 Language: It allows the C++14 language features to be used in the C++ source code within the JDK. - Migrate from Mercurial to Git: Migrates the OpenJDK source code from Mercurial to Git or GitHub. - Concurrent Thread-Stack Processing: It improves the Z Garbage Collector (ZGC) by moving the ZGC thread-stack processing from safepoints to a concurrent phase. - Unix-Domain Socket Channels: The Unix-domain sockets are used for inter-process communication (IPC) on the same host, which means exchanging data between processes executing on the same host. New Unix-domain Socket classes or APIs added (New socket address class, java.net.UnixDomainSocketAddress, New enum, java.net.StandardProtocolFamily.UNIX). - Alpine Linux Port: This JEP port the JDK to Alpine Linux and other Linux distributions that use musl implementation. This JDK port enables Java to run out-of-the-box in Alpine Linux, which benefits those Java-dependent frameworks or tools like Tomcat and Spring. - Elastic Metaspace: Java 8 JEP 122 removed the PermGen (Permanent Generation) and introduced Metaspace, a native off-heap memory manager in the hotspot. Java 16 improves the metaspace memory management by returning unused HotSpot class-metadata or metaspace memory to the operating system more promptly, reducing the metaspace footprint, and simplifying the metaspace code. - Windows/AArch64 Port: This port the JDK to Windows/AArch64, running JDK + Windows on ARM hardware, server, or ARM-based laptop. - Foreign Linker API: Enables Java code to call or can be called by native code written in o

Java 15

Interview Online Test

Java 16

Interview Online Test

Features Added:
- Records: The record is a new type of class in Java that makes it easy to create immutable data objects. It was introduced in Java 14. Java 15 aims to refine a few aspects before becoming an official product feature. The class definition has a new syntax that is specific for records, allow us to override some of the default behaviors.

- Sealed Classes: Java provides no fine-grained control over the inheritance. Sealed classes involve two new keywords â€” sealed and permits. These are to allow individual classes to declare which types may be used as sub-types. This also applies to interfaces and determining which types can implement them. Any class that extends a sealed class must itself be declared sealed, non-sealed, or final.

- Hidden Classes: It is to allow the runtime creation of classes that are not discoverable.

- Pattern Matching Type Checks: Here got few enhancement top of Java 14. The goal of this feature is to remove a lot of boilerplate code that typically comes with the instanceof operator.

- Foreign Memory API: Foreign memory generally refers to memory that lives outside the managed JVM heap. Because of this, it's not subject to garbage collection and can typically handle incredibly large memory segments. A new VarHandle API, to customize memory access var handles. Support for parallel processing of a memory segment using the Spliterator interface. Enhanced support for mapped memory segments. Ability to manipulate and dereference addresses coming from things like native calls.

- Garbage Collectors: In Java 15, both ZGC and Shenandoah will be no longer be experimental. Both will be supported configurations that teams can opt to use, while the G1 collector will remain the default.

Features Added:
- Vector API: Java supports auto-vectorization to optimize the arithmetic algorithms, which means the Java (JIT compiler) will transform some scalar operations (one item at a time) into vector operations (multiple items at a time) automatically. Developers have no control of this vector operation conversion, it totally depends on the JIT compiler to optimize the code.

- Enable C++14 Language: It allows the C++14 language features to be used in the C++ source code within the JDK.

- Migrate from Mercurial to Git: Migrates the OpenJDK source code from Mercurial to Git or GitHub.

- Concurrent Thread-Stack Processing: It improves the Z Garbage Collector (ZGC) by moving the ZGC thread-stack processing from safepoints to a concurrent phase.

- Unix-Domain Socket Channels: The Unix-domain sockets are used for inter-process communication (IPC) on the same host, which means exchanging data between processes executing on the same host. New Unix-domain Socket classes or APIs added (New socket address class, java.net.UnixDomainSocketAddress, New enum, java.net.StandardProtocolFamily.UNIX).

- Alpine Linux Port: This JEP port the JDK to Alpine Linux and other Linux distributions that use musl implementation. This JDK port enables Java to run out-of-the-box in Alpine Linux, which benefits those Java-dependent frameworks or tools like Tomcat and Spring.

- Elastic Metaspace: Java 8 JEP 122 removed the PermGen (Permanent Generation) and introduced Metaspace, a native off-heap memory manager in the hotspot. Java 16 improves the metaspace memory management by returning unused HotSpot class-metadata or metaspace memory to the operating system more promptly, reducing the metaspace footprint, and simplifying the metaspace code.

- Windows/AArch64 Port: This port the JDK to Windows/AArch64, running JDK + Windows on ARM hardware, server, or ARM-based laptop.

- Foreign Linker API: Enables Java code to call or can be called by native code written in o

保存以便复习

收藏此条目、标记为困难题，或将其加入复习集合。

打开我的学习资料库

这有帮助吗？是否

更多类似内容

从下方查看差异对比

浏览下面所有可用的主题比较，或使用上方搜索框快速缩小范围。

通过聚焦学习路径、模拟测试和面试实战内容持续提升技能。

Java 15 对比 Java 16

主题对比

Java 15 与 Java 16 的区别

保存以便复习

相关差异对比

从下方查看差异对比

WithoutBook