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【小家java】java9新特性（简述十大新特性）褒贬不一(下)

7、集合工厂方法：快速创建只读集合为了保证数据的安全性，有时候我们需要创建一个只读的List。在JDK8的时候，我们只能这么做：Collections.unmodifiableList(list) Collections.unmodifiableSet(set) Collections.unmodi...

【小家java】java9新特性（简述十大新特性）褒贬不一(中)

3、多版本兼容 jar 包（这个在处理向下兼容方面，非常好用）当一个新版本的 Java 出现的时候，你的库用户要花费数年时间才会切换到这个新的版本。这就意味着库得去向后兼容你想要支持的最老的 Java 版本（许多情况下就是 Java 6 或者 Java7）。这实际上意味着未来的很长一段时间，你都不能...

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每篇一句李连杰：生命开始的时候到生命结束。头半段是需要别人帮忙的经过4次跳票，历经曲折的java 9 终于终于在2017年9月21日发布（距离上个版本足足3年半时间）java 9 提供了超过 150 项新功能特性，包括备受期待的模块化系统、可交互的 REPL 工具：jshell，JDK 编译工具&a...

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