- Create a new folder named lib in your project folder. This stands for "libraries" and will contain all the JARs you'll be using for that project.
- Copy the JARs you need to lib.
- Refresh your project by right clicking the project name and selecting Refresh. Thelib folder will now be visible in Eclipse with the JARs inside.
- Create a new folder named lib in your project folder. This stands for "libraries" and will contain all the JARs you'll be using for that project.
- 2Complete either of the following methods to finish configuring your build path.
Method 1
- 1Expand lib in Eclipse and select all the JARs you need.
- 2Right-click the JARs and navigate to Build Path.
- 3Select Add to Build Path. The JARs will disappear from lib and reappear in Referenced Libraries.
Method 2
- 1Right click the project name and navigate to Build Path.
- 2Select Configure Build Path... and the project properties window will appear showing your build path configurations.
- 3Select the Libraries tab.
- 4Click Add JARs...
- 5Locate and select the JARs you want and click OK. The JARs will now appear in the list of libraries in the build path.
- 6Click OK to close the properties window. The JARs will now be in Referenced Libraries instead of lib.
Adding External JARs
Note: It is much better to reference JARs that exist in your project or in other projects - this allows you to check in all of your dependencies to your version control system. (You are using version control, right?)
Use one of the following methods.
Method 1
This is the preferred method, as it allows different developers of a common project to locate their external jars in different places.
- 1Right click the project name and navigate to Build Path.
- 2Select Configure Build Path... and the project properties window will appear showing your build path configurations.
- 3Click Add Variable...
- 4Click Configure Variables...
- 5Click New...
- 6Type a name for the new variable. For example, if these are JARs for Tomcat, perhaps call it TOMCAT_JARS
- 7Browse to the directory that contains the JAR for the path. (You can also select a specific jar file for the variable, if you prefer.)
- 8Click Ok to define the variable.
- 9Click Ok to close the preferences dialog.
- 10Select the variable from the list.
- 11Click Extend...
- 12Select the JAR(s) that you want to add to the classpath.
- 13Click Ok to close the extend dialog.
- 14Click Ok to close the new classpath variable dialog.
- 15Click Ok to close the build path setup dialog.
If you share the project with someone else, they must also define the variable. They can define it under
Window->Preferences->Java->Build Path->Classpath Variables
Method 2
Note that if you use this method, the external JAR will need to be in the same location on the hard drive for anyone who uses this project. This can make sharing a common project more difficult.
- 1Right click the project name and navigate to Build Path.
- 2Select Add External Archives...
- 3Locate and select the JARs you want and click Open. The JARs will now appear inReferenced Libraries.
Method 3
Note that if you use this method, the external jar will need to be in the same location on the hard drive for anyone who uses this project. This can make sharing a common project more difficult.
- 1Right-click the project name and navigate to Build Path.
- 2Select Configure Build Path... and the project properties window will appear showing your build path configurations.
- 3Select the Libraries tab.
- 4Click Add External JARs...
- 5Locate and select the JARs you want and click Open. The JARs will now appear in the list of libraries in the build path.
- 6Click OK to close the properties window. The JARs will now be in Referenced Libraries.
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