How to Add JARs to Project Build Paths in Eclipse (Java)

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   1
   Expand the lib folder in Eclipse. Click the arrow to the left of the folder to expand it.
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   2
   Select all the JARs you need. Hold ⇧ Shift and click the JARs in the expanded folder.
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   3
   Right-click the JARs. This opens a pop-up menu to the right.
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   4
   Navigate to Build Path . Placing the mouse cursor over "Build Path" displays a submenu to the left.
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   5
   Select Add to Build Path . The JARs will disappear from lib and reappear in Referenced Libraries .
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   1
   Right-click the project name. This displays a pop-up menu to the right.
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   2
   Navigate to Build Path . It's in the pop-up menu that displays when you right-click on the project name. This displays a sub-menu to the right.
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   3
   Click Configure Build Path . The project properties window will appear showing your build path configurations.
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   4
   Select the Libraries tab. It's at the top of the project properties window.
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   5
   Click Add JARs . It's on the right side of the project properties window.
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   6
   Select the JARs you want and click OK . The JARs will now appear in the list of libraries in the build path.
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   7
   Click OK to close the properties window. The JARs will now be in Referenced Libraries instead of lib .
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   1
   Right-click the project name. This displays a pop-up menu to the right.

   • 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.
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   2
   Navigate to Build Path . This displays a sub-menu to the right.
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   3
   Click Configure Build Path . The project properties window will appear showing your build path configurations.
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   4
   Click Add Variable . It's to the right of the project properties window.
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   5
   Click Configure Variables . It's at the bottom of the New Variables window.
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   6
   Click New . It's at the bottom of the preferences window.
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   7
   Type a name for the new variable. For example, if these are JARs for Tomcat, perhaps you could call it "TOMCAT_JARS".
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   8
   Browse to the directory that contains the JAR for the path. Click the Folder button and browse to the directory that contains the JAR path.

   • You can also Click File and select a specific jar file for the variable, if you prefer.
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   9
   Click OK . This defines the variables.
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    10
    Click OK . This closes the preferences dialog.
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    11
    Select the variable from the list. Click the variable to select it.
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    12
    Click Extend . It's the button to the right of the list of variables.
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    13
    Select the JAR(s) that you want to add to the classpath. Click to select the JARs. Hold ⇧ Shift to select multiple JARs.
14. {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/a\/ae\/Add-JARs-to-Project-Build-Paths-in-Eclipse-%28Java%29-Step-29-Version-2.jpg\/v4-460px-Add-JARs-to-Project-Build-Paths-in-Eclipse-%28Java%29-Step-29-Version-2.jpg","bigUrl":"\/images\/thumb\/a\/ae\/Add-JARs-to-Project-Build-Paths-in-Eclipse-%28Java%29-Step-29-Version-2.jpg\/aid451799-v4-728px-Add-JARs-to-Project-Build-Paths-in-Eclipse-%28Java%29-Step-29-Version-2.jpg","smallWidth":460,"smallHeight":348,"bigWidth":728,"bigHeight":550,"licensing":"<div class=\"mw-parser-output\"><p>License: <a target=\"_blank\" rel=\"nofollow noreferrer noopener\" class=\"external text\" href=\"https:\/\/en.wikipedia.org\/wiki\/Fair_use\">Fair Use<\/a> (screenshot)<br>\n<\/p><\/div>"}
    14
    Click OK . This closes the extend dialog window.
15. {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/5\/54\/Add-JARs-to-Project-Build-Paths-in-Eclipse-%28Java%29-Step-30.jpg\/v4-460px-Add-JARs-to-Project-Build-Paths-in-Eclipse-%28Java%29-Step-30.jpg","bigUrl":"\/images\/thumb\/5\/54\/Add-JARs-to-Project-Build-Paths-in-Eclipse-%28Java%29-Step-30.jpg\/aid451799-v4-728px-Add-JARs-to-Project-Build-Paths-in-Eclipse-%28Java%29-Step-30.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"<div class=\"mw-parser-output\"><p>License: <a target=\"_blank\" rel=\"nofollow noreferrer noopener\" class=\"external text\" href=\"https:\/\/en.wikipedia.org\/wiki\/Fair_use\">Fair Use<\/a> (screenshot)<br>\n<\/p><\/div>"}
    15
    Click OK . This closes the new classpath variable dialog.
16. {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/f\/fd\/Add-JARs-to-Project-Build-Paths-in-Eclipse-%28Java%29-Step-31.jpg\/v4-460px-Add-JARs-to-Project-Build-Paths-in-Eclipse-%28Java%29-Step-31.jpg","bigUrl":"\/images\/thumb\/f\/fd\/Add-JARs-to-Project-Build-Paths-in-Eclipse-%28Java%29-Step-31.jpg\/aid451799-v4-728px-Add-JARs-to-Project-Build-Paths-in-Eclipse-%28Java%29-Step-31.jpg","smallWidth":460,"smallHeight":344,"bigWidth":728,"bigHeight":544,"licensing":"<div class=\"mw-parser-output\"><p>License: <a target=\"_blank\" rel=\"nofollow noreferrer noopener\" class=\"external text\" href=\"https:\/\/en.wikipedia.org\/wiki\/Fair_use\">Fair Use<\/a> (screenshot)<br>\n<\/p><\/div>"}
    16
    Click OK . This closes 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 .
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Adding External JARs (Alternative Method 1)

1. {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/1\/1e\/Add-JARs-to-Project-Build-Paths-in-Eclipse-%28Java%29-Step-32-Version-2.jpg\/v4-460px-Add-JARs-to-Project-Build-Paths-in-Eclipse-%28Java%29-Step-32-Version-2.jpg","bigUrl":"\/images\/thumb\/1\/1e\/Add-JARs-to-Project-Build-Paths-in-Eclipse-%28Java%29-Step-32-Version-2.jpg\/aid451799-v4-728px-Add-JARs-to-Project-Build-Paths-in-Eclipse-%28Java%29-Step-32-Version-2.jpg","smallWidth":460,"smallHeight":347,"bigWidth":728,"bigHeight":549,"licensing":"<div class=\"mw-parser-output\"><p>License: <a target=\"_blank\" rel=\"nofollow noreferrer noopener\" class=\"external text\" href=\"https:\/\/en.wikipedia.org\/wiki\/Fair_use\">Fair Use<\/a> (screenshot)<br>\n<\/p><\/div>"}
   1
   Right-click the project name. This displays a pop-up menu to the side.

   • 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.
2. {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/0\/0a\/Add-JARs-to-Project-Build-Paths-in-Eclipse-%28Java%29-Step-33-Version-2.jpg\/v4-460px-Add-JARs-to-Project-Build-Paths-in-Eclipse-%28Java%29-Step-33-Version-2.jpg","bigUrl":"\/images\/thumb\/0\/0a\/Add-JARs-to-Project-Build-Paths-in-Eclipse-%28Java%29-Step-33-Version-2.jpg\/aid451799-v4-728px-Add-JARs-to-Project-Build-Paths-in-Eclipse-%28Java%29-Step-33-Version-2.jpg","smallWidth":460,"smallHeight":344,"bigWidth":728,"bigHeight":544,"licensing":"<div class=\"mw-parser-output\"><p>License: <a target=\"_blank\" rel=\"nofollow noreferrer noopener\" class=\"external text\" href=\"https:\/\/en.wikipedia.org\/wiki\/Fair_use\">Fair Use<\/a> (screenshot)<br>\n<\/p><\/div>"}
   2
   Navigate to Build Path . This displays a sub-menu to the right.
3. {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/9\/92\/Add-JARs-to-Project-Build-Paths-in-Eclipse-%28Java%29-Step-34.jpg\/v4-460px-Add-JARs-to-Project-Build-Paths-in-Eclipse-%28Java%29-Step-34.jpg","bigUrl":"\/images\/thumb\/9\/92\/Add-JARs-to-Project-Build-Paths-in-Eclipse-%28Java%29-Step-34.jpg\/aid451799-v4-728px-Add-JARs-to-Project-Build-Paths-in-Eclipse-%28Java%29-Step-34.jpg","smallWidth":460,"smallHeight":344,"bigWidth":728,"bigHeight":545,"licensing":"<div class=\"mw-parser-output\"><p>License: <a target=\"_blank\" rel=\"nofollow noreferrer noopener\" class=\"external text\" href=\"https:\/\/en.wikipedia.org\/wiki\/Fair_use\">Fair Use<\/a> (screenshot)<br>\n<\/p><\/div>"}
   3
   Click Add External Archives . It's in the Build Path sub-menu.
   
   
4. {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/1\/1b\/Add-JARs-to-Project-Build-Paths-in-Eclipse-%28Java%29-Step-35-Version-2.jpg\/v4-460px-Add-JARs-to-Project-Build-Paths-in-Eclipse-%28Java%29-Step-35-Version-2.jpg","bigUrl":"\/images\/thumb\/1\/1b\/Add-JARs-to-Project-Build-Paths-in-Eclipse-%28Java%29-Step-35-Version-2.jpg\/aid451799-v4-728px-Add-JARs-to-Project-Build-Paths-in-Eclipse-%28Java%29-Step-35-Version-2.jpg","smallWidth":460,"smallHeight":344,"bigWidth":728,"bigHeight":545,"licensing":"<div class=\"mw-parser-output\"><p>License: <a target=\"_blank\" rel=\"nofollow noreferrer noopener\" class=\"external text\" href=\"https:\/\/en.wikipedia.org\/wiki\/Fair_use\">Fair Use<\/a> (screenshot)<br>\n<\/p><\/div>"}
   4
   Select the JARs you want and click Open . The JARs will now appear in Referenced Libraries .
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1. {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/7\/73\/Add-JARs-to-Project-Build-Paths-in-Eclipse-%28Java%29-Step-36.jpg\/v4-460px-Add-JARs-to-Project-Build-Paths-in-Eclipse-%28Java%29-Step-36.jpg","bigUrl":"\/images\/thumb\/7\/73\/Add-JARs-to-Project-Build-Paths-in-Eclipse-%28Java%29-Step-36.jpg\/aid451799-v4-728px-Add-JARs-to-Project-Build-Paths-in-Eclipse-%28Java%29-Step-36.jpg","smallWidth":460,"smallHeight":347,"bigWidth":728,"bigHeight":549,"licensing":"<div class=\"mw-parser-output\"><p>License: <a target=\"_blank\" rel=\"nofollow noreferrer noopener\" class=\"external text\" href=\"https:\/\/en.wikipedia.org\/wiki\/Fair_use\">Fair Use<\/a> (screenshot)<br>\n<\/p><\/div>"}
   1
   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.
2. {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/8\/8a\/Add-JARs-to-Project-Build-Paths-in-Eclipse-%28Java%29-Step-37.jpg\/v4-460px-Add-JARs-to-Project-Build-Paths-in-Eclipse-%28Java%29-Step-37.jpg","bigUrl":"\/images\/thumb\/8\/8a\/Add-JARs-to-Project-Build-Paths-in-Eclipse-%28Java%29-Step-37.jpg\/aid451799-v4-728px-Add-JARs-to-Project-Build-Paths-in-Eclipse-%28Java%29-Step-37.jpg","smallWidth":460,"smallHeight":344,"bigWidth":728,"bigHeight":544,"licensing":"<div class=\"mw-parser-output\"><p>License: <a target=\"_blank\" rel=\"nofollow noreferrer noopener\" class=\"external text\" href=\"https:\/\/en.wikipedia.org\/wiki\/Fair_use\">Fair Use<\/a> (screenshot)<br>\n<\/p><\/div>"}
   2
   Navigate to Build Path . It's in the pop-up menu that appears when you right-click the project name.
3. {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/c\/cc\/Add-JARs-to-Project-Build-Paths-in-Eclipse-%28Java%29-Step-38.jpg\/v4-460px-Add-JARs-to-Project-Build-Paths-in-Eclipse-%28Java%29-Step-38.jpg","bigUrl":"\/images\/thumb\/c\/cc\/Add-JARs-to-Project-Build-Paths-in-Eclipse-%28Java%29-Step-38.jpg\/aid451799-v4-728px-Add-JARs-to-Project-Build-Paths-in-Eclipse-%28Java%29-Step-38.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"<div class=\"mw-parser-output\"><p>License: <a target=\"_blank\" rel=\"nofollow noreferrer noopener\" class=\"external text\" href=\"https:\/\/en.wikipedia.org\/wiki\/Fair_use\">Fair Use<\/a> (screenshot)<br>\n<\/p><\/div>"}
   3
   Click Configure Build Path . The project properties window will appear showing your build path configurations.
4. {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/4\/41\/Add-JARs-to-Project-Build-Paths-in-Eclipse-%28Java%29-Step-39.jpg\/v4-460px-Add-JARs-to-Project-Build-Paths-in-Eclipse-%28Java%29-Step-39.jpg","bigUrl":"\/images\/thumb\/4\/41\/Add-JARs-to-Project-Build-Paths-in-Eclipse-%28Java%29-Step-39.jpg\/aid451799-v4-728px-Add-JARs-to-Project-Build-Paths-in-Eclipse-%28Java%29-Step-39.jpg","smallWidth":460,"smallHeight":344,"bigWidth":728,"bigHeight":545,"licensing":"<div class=\"mw-parser-output\"><p>License: <a target=\"_blank\" rel=\"nofollow noreferrer noopener\" class=\"external text\" href=\"https:\/\/en.wikipedia.org\/wiki\/Fair_use\">Fair Use<\/a> (screenshot)<br>\n<\/p><\/div>"}
   4
   Select the Libraries tab. It's at the top of the project properties window.
5. {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/5\/5e\/Add-JARs-to-Project-Build-Paths-in-Eclipse-%28Java%29-Step-40.jpg\/v4-460px-Add-JARs-to-Project-Build-Paths-in-Eclipse-%28Java%29-Step-40.jpg","bigUrl":"\/images\/thumb\/5\/5e\/Add-JARs-to-Project-Build-Paths-in-Eclipse-%28Java%29-Step-40.jpg\/aid451799-v4-728px-Add-JARs-to-Project-Build-Paths-in-Eclipse-%28Java%29-Step-40.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"<div class=\"mw-parser-output\"><p>License: <a target=\"_blank\" rel=\"nofollow noreferrer noopener\" class=\"external text\" href=\"https:\/\/en.wikipedia.org\/wiki\/Fair_use\">Fair Use<\/a> (screenshot)<br>\n<\/p><\/div>"}
   5
   Click Add External JARs . It's on the right side of the project properties window.
6. {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/a\/a8\/Add-JARs-to-Project-Build-Paths-in-Eclipse-%28Java%29-Step-41.jpg\/v4-460px-Add-JARs-to-Project-Build-Paths-in-Eclipse-%28Java%29-Step-41.jpg","bigUrl":"\/images\/thumb\/a\/a8\/Add-JARs-to-Project-Build-Paths-in-Eclipse-%28Java%29-Step-41.jpg\/aid451799-v4-728px-Add-JARs-to-Project-Build-Paths-in-Eclipse-%28Java%29-Step-41.jpg","smallWidth":460,"smallHeight":344,"bigWidth":728,"bigHeight":545,"licensing":"<div class=\"mw-parser-output\"><p>License: <a target=\"_blank\" rel=\"nofollow noreferrer noopener\" class=\"external text\" href=\"https:\/\/en.wikipedia.org\/wiki\/Fair_use\">Fair Use<\/a> (screenshot)<br>\n<\/p><\/div>"}
   6
   Select the JARs you want and click Open . The JARs will now appear in the list of libraries in the build path.
7. {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/a\/a1\/Add-JARs-to-Project-Build-Paths-in-Eclipse-%28Java%29-Step-42.jpg\/v4-460px-Add-JARs-to-Project-Build-Paths-in-Eclipse-%28Java%29-Step-42.jpg","bigUrl":"\/images\/thumb\/a\/a1\/Add-JARs-to-Project-Build-Paths-in-Eclipse-%28Java%29-Step-42.jpg\/aid451799-v4-728px-Add-JARs-to-Project-Build-Paths-in-Eclipse-%28Java%29-Step-42.jpg","smallWidth":460,"smallHeight":348,"bigWidth":728,"bigHeight":550,"licensing":"<div class=\"mw-parser-output\"><p>License: <a target=\"_blank\" rel=\"nofollow noreferrer noopener\" class=\"external text\" href=\"https:\/\/en.wikipedia.org\/wiki\/Fair_use\">Fair Use<\/a> (screenshot)<br>\n<\/p><\/div>"}
   7
   Click OK to close the properties window. The JARs will now be in Referenced Libraries .
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