Eclipse - How to add/remove external JAR into Java Project's Classpath? Example

 In Eclipse, you can add or remove external JAR files from a Java project's classpath using the following steps:

                                            

To add an external JAR file to the classpath:

1. Right-click on the Java project in the Package Explorer or Project Explorer view.
2. Select "Build Path" from the context menu.
3. Choose "Configure Build Path" to open the Project Properties dialog.
4. In the Project Properties dialog, select the "Libraries" tab.
5. Click on the "Add External JARs" button.
6. Browse to the location of the JAR file you want to add, select it, and click "Open".
7. The selected JAR file will be added to the classpath of your Java project.
8. Click "Apply" or "OK" to save the changes.

To remove an external JAR file from the classpath:

1. Follow steps 1-4 above to open the Project Properties dialog.
2. In the Libraries tab, select the JAR file you want to remove from the classpath.
3. Click on the "Remove" button.
4. The selected JAR file will be removed from the classpath of your Java project.
5. Click "Apply" or "OK" to save the changes.

Example:

Let's say you have a Java project named "MyProject" and you want to add an external JAR file called "library.jar" to the classpath.

To add the external JAR file to the classpath in Eclipse:

1. Right-click on the "MyProject" project in the Package Explorer or Project Explorer.
2. Select "Build Path" from the context menu.
3. Choose "Configure Build Path" to open the Project Properties dialog.
4. In the Project Properties dialog, select the "Libraries" tab.
5. Click on the "Add External JARs" button.
6. Browse to the location where the "library.jar" file is located, select it, and click "Open".
7. The "library.jar" file will be added to the classpath of your "MyProject" Java project.
8. Click "Apply" or "OK" to save the changes.

To remove the external JAR file from the classpath:

1. Follow steps 1-4 above to open the Project Properties dialog.
2. In the Libraries tab, select the "library.jar" file.
3. Click on the "Remove" button.
4. The "library.jar" file will be removed from the classpath of your "MyProject" Java project.
5. Click "Apply" or "OK" to save the changes.

By managing the classpath in Eclipse, you can control the external libraries or JAR files that are used by your Java project.