How does the java project introduce other jar packages

This article mainly introduces the java project how to introduce other jar packages, has a certain reference value, interested friends can refer to, I hope you can learn a lot after reading this article, the following let the editor take you to understand it.

Tools.jar is a newly typed toolkit, now import it into the project.

Step 1 lib directory

Basically every java project has a lib directory. We create this directory and throw the jar package into it.

The purpose of the lib directory is to store third-party jar packages.

Step 2 modify the compilation script

Mkdir classesjavac-classpath.; D:\ java18\ cstmgr;D:\ java18\ cstmgr\ lib\ tools.jar-d D:\ java18\ cstmgr\ classes * .javajavac-classpath.; D:\ java18\ cstmgr;D:\ java18\ cstmgr\ lib\ tools.jar-d D:\ java18\ cstmgr\ classes entity\ * .javapause

Instead of compiling the java class in the tool folder, just add the jar package to classpath.

Step 3 compile the cstmgr project

Step 4 New mode of operation

When we come to the classes folder, we need to change the operation mode. One more step is to add the path of the jar package. Note that the path of the jar package needs to end with * *; * *.

-cp is the path where the jar package is introduced.

Step 5: mkdir classesjavac-classpath.; D:\ java18\ cstmgr;D:\ java18\ cstmgr\ lib\ tools.jar-d D:\ java18\ cstmgr\ classes * .javajavac-classpath.; D:\ java18\ cstmgr;D:\ java18\ cstmgr\ lib\ tools.jar-d D:\ java18\ cstmgr\ classes entity\ *. Javacd classesjava-cp D:\ java18\ cstmgr\ lib\ tools.jar; Applicationpause

Rerun.

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