double %f", d); case String s -> String.format("String %s", s); default -> obj.toString(); };}// As of Java 21static void testFooBarNew(String s) { switch (s) { case null -> System.out.println("Oops"); case "Foo", "Bar" -> System.out.println...
源仓库: Github:java_new_featuresRecord Patterns#该功能首次在 Java SE 19 中预览,在Java SE 20中发布第二次预览版,在此版本中成为永久性功能。这意味着它可以在任何为 Java SE 21 编译的程序中使用,而无需启用预览功能。示例代码如下package git.snippets.jdk21; /** * record 模式匹配增强 * 无须增加 ...
}// 从14开始booleanisTodayHoliday=switch(day) {case"MONDAY","TUESDAY","WEDNESDAY","THURSDAY","FRIDAY"->false;case"SATURDAY","SUNDAY"->true;default->thrownewIllegalArgumentException("What's a "+ day); };// 从17开始staticrecordHuman(String name,intage, String profession) {}publicStringcheck...
New in Java 21 Along with thousands of performance, stability and security updates, Java 21 delivers dozens of new features and enhancements, 15 of those enhancements are significant enough to warrant their own JDK Enhancement Proposals - JEPs, covering six preview features and one incubator feature...
And the best part is the way these new features sync with Java’s overarching design philosophy. Unnamed classes are joining their unnamed package and module cousins. And it’s backward-compatible too.” “The sequenced collections feature in Java 21 is a great addition for the developer ...
In Java 21 there are three brand-new preview features that I just can’t skip—and I love how diverse they are! They span from improving a Java workhorse to refining a programming paradigm to changing how beginners learn the language. ...
Spring Framework 6.0.x: JDK 17-21 (expected)Spring Framework 5.3.x: JDK 8-19 (expected)Spr...
README JavaLearnNote The new features from Java 9 to Java 21 help you quickly grasp the key features ---java9到java21的新特性,帮助各位快速掌握其中关键特性 在线网站:https://nanshaws.github.io/ 运行此项目: npm install npm run docs:dev 运行效果图: 目前未完成的工作: 英文版About...
在Java21中,除了推出很多新特性之外,一些Bug修复,也需要注意一下。因为这些改变可能在升级的时候,造成影响。 Double.toString()和Float.toString()的精度问题修复 比如:对于Double.String(1e23): 在Java 19后,输出内容为:1.0E23 在Java 18中,输出内容为:9.999999999999999E22 ...
Java 12 introduces a lot of new language features. In this section, we’ll discuss a few most interesting ones with code examples for better understanding. 2.1. String Class New Methods Java 12 comes with two new methods intheStringclass. ...