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jdk1.8解压即可

上传者： 34811445 | 上传时间： 2024-10-14 10:49:46 | 文件大小： 174.52MB | 文件类型： ZIP
Java Development Kit（JDK）是Java编程语言的软件开发工具包，它包含了编译器、JRE（Java Runtime Environment）、调试器以及其他工具，使开发者能够编写、编译、调试和运行Java应用程序。JDK 1.8是Oracle公司发布的Java平台标准版的一个重要版本，它在2014年发布，引入了许多新特性和改进，对于Java开发者来说具有里程碑式的意义。 标题“jdk1.8解压即可”表明这是一个关于JDK 1.8的压缩文件，用户在下载后只需要进行解压缩操作，无需安装过程，即可开始使用。 描述中的“jdk1.8_64位 解压直接配置环境变量即可”进一步说明这是适用于64位操作系统的JDK 1.8版本。在Windows、Linux或macOS等操作系统中，为了让系统识别并使用JDK，需要对环境变量进行配置。具体步骤如下： 1. **设置JAVA_HOME**：将JDK的安装路径（解压后的目录）添加到系统环境变量JAVA_HOME中。 2. **配置Path**：在Path变量中添加%JAVA_HOME%\bin，这样系统就能在任何位置执行Java命令。 3. **设置Classpath**：对于JDK 1.8，通常不需要手动设置Classpath，因为JDK会自动处理大多数情况。但如果需要引用特定的类库，可以添加到Classpath中。 在JDK 1.8中，有一些重要的更新和特性： 1. **Lambda表达式**：引入了函数式编程的概念，允许使用简洁的匿名函数，简化了处理集合的操作。 2. **Stream API**：提供了一种新的处理数据的方式，可以方便地进行序列化操作，例如过滤、映射和减少等，使得集合操作更加高效。 3. **方法引用来替换Lambda**：可以使用方法引用来代替Lambda表达式，当需要调用已有的方法时更为直观。 4. **Date和Time API增强**：提供了新的java.time包，替代了过时的java.util.Date和java.util.Calendar，提供了更强大、更易于使用的日期和时间API。 5. **接口的默认方法**：允许在接口中定义默认方法，这样可以在不修改实现类的情况下为接口添加新功能。 6. **类型推断改进**：在泛型实例化时，编译器可以更好地推断类型，使得代码更简洁。 7. **Optional类**：用于表示可能为null的值，帮助避免空指针异常。 在实际开发中，JDK 1.8广泛应用于各种项目，但随着JDK版本的更新，如JDK 11、17等，一些新的特性如模块系统（Project Jigsaw）、HTTP客户端API等不断引入，开发者也需要持续学习和适应新的技术。然而，对于老项目或依赖JDK 1.8特性的应用，JDK 1.8仍然是一个可靠的选择。

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