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Select the JARs you want and click Open. The JARs will now appear in Referenced Libraries.
Part 5 of 5:
Adding External JARs (Alternative Method 2)
Right-click the project name. This displays a pop-up menu to the right.
Note: 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.
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Navigate to Build Path. It's in the pop-up menu that appears when you right-click the project name.
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Click Configure Build Path. The project properties window will appear showing your build path configurations.
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Select the Libraries tab. It's at the top of the project properties window.
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Click Add External JARs. It's on the right side of the project properties window.
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Select the JARs you want and click Open. The JARs will now appear in the list of libraries in the build path.
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Click OK to close the properties window. The JARs will now be in Referenced Libraries.