Java console program MANIFEST.MF

 在Java中，META-INF目錄下可以包含各種元數據文件，用於描述和配置Java程序或庫。如果您正在編寫Java控制台程序，通常不會直接涉及META-INF目錄或其文件。 META-INF目錄通常在Java庫（JAR文件）中使用，用於存儲一些與庫相關的元數據信息。


在META-INF目錄下，可能會有一些常見的文件，其中之一是MANIFEST.MF。 MANIFEST.MF文件是JAR文件中的元數據文件，用於指定JAR文件的屬性、入口點類和其他相關信息。


這是一個簡單的MANIFEST.MF文件示例：

Manifest-Version: 1.0

Main-Class: com.example.Main

在上述示例中，MANIFEST.MF文件指定了JAR文件的版本信息和主類（入口點類）。當您將Java程序打包為JAR文件時，可以在MANIFEST.MF文件中指定主類，以便在運行JAR文件時自動找到程序的入口點。

請注意，MANIFEST.MF文件是可選的，並不是所有的Java程序或庫都需要它。只有在需要為JAR文件指定特定的屬性或入口點類時，您才需要創建並使用MANIFEST.MF文件。如果您只是編寫普通的Java控制台程序，通常不需要關注META-INF目錄和MANIFEST.MF文件。

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