java -jar cannot find main class

java -jar cannot find the main class

After correctly compiling the java program, package it, and then enter java -jar on the command line , but it pops up that there is no main manifest attribute or the main class cannot be found or cannot be loaded.

The solution is to modify the MANIFEST file.

1. Open the jar package with WinRAR and find the MANIFEST.MF file inside.

2. For example, the package named draw contains three classes, among which print.class needs to be run.

3. An extra line is added to the MANIFEST.MF file: Main-Class: draw.print.

draw.print is the name of the class to be run. Don’t forget to bring the name of the previous package.

Note: After adding Main-Class: in the MANIFEST.MF file, if nothing is filled in or the class name is wrong, the main class will not be found or cannot be loaded.

Both cases show that the main class cannot be loaded.

php Chinese website, a large number of free Java introductory tutorials, welcome to learn online!

The above is the detailed content of java -jar cannot find main class. For more information, please follow other related articles on the PHP Chinese website!