Java Jar Manifest

The jar file can optionally contain a META-INF file named in the directory MANIFEST.MF Manifest . ManifestThe file contains information about the jar file and its entries. The Manifest file can contain information about the settings of the jar file CLASSPATH and its main item class.

The main item class is the class that has the method to start the standalone application main() , the version information for the package, and so on.

manifestThe file is divided into sections separated by blank lines. Each section contains a name-value pair. A new row separates each name/value pair. The colon separates the name and its corresponding value.

The manifest file must end with a new line. The following is a sample manifest file:

1234	Manifest-Version: 1.0Created-By: 1.8.0_20-ea-b05 (Oracle Corporation) Main-Class: cn.sxt.MainProfile:  compact1

The above manifest file has a section with four attributes:

• Manifest-version

• Created-by

• Main-class

• Profile

Part of the jar manifest file

manifestThere are two types of parts in a file: The main part and the individual parts.

A blank line must separate any two parts. The entries in the main section apply to the entire JAR file. The entries in a single section apply to specific entries.

The properties in a single section override the same properties in the main section. A single entry begins with a "name" property whose value is the name of the entry in the jar file followed by other properties of the entry.

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Java Jar Manifest