How to add a JAR in NetBeans

Question

Let s say you create a new project  and want it to make use of some 3rd party library  say  widget jar  Where do you add this JAR    File    Project Properties    Libraries    Compile-Time Libraries  or File    Project Properties    Libraries    Run-Time Libraries  or Tools    Libraries  Library Manager     Library Classpath  or Tools    Java Platforms  Java Platform Manager    All of these dialogs seem to do the same thing but I m sure they all have their proper usages  Can t find a good  best practices  article online and the NetBeans Help Contents dialog isn t helping with this either

User · Answer

Right click  libraries  in the  project list  then click add

User · Answer

If your project s source code has import statements that reference classes that are in widget jar  you should add the jar to your projects Compile-time Libraries    The jar widget jar will automatically be added to your project s Run-time Libraries    That corresponds to  1    If your source code has imports for classes in some other jar and the source code for those classes has import statements that reference classes in widget jar  you should add widget jar to the Run-time libraries list  That corresponds to  2    You can add the jars directly to the Libraries list in the project properties   You can also create a Library that contains the jar file and then include that Library in the Compile-time or Run-time Libraries list   If you create a NetBeans Library for widget jar  you can also associate source code for the jar s content and Javadoc for the APIs defined in widget jar   This additional information about widget jar will be used by NetBeans as you debug code  It will also be used to provide addition information when you use code completion in the editor   You should avoid using Tools    Java Platform to add a jar to a project   That dialog allows you to modify the classpath that is used to compile and run all projects that use the Java Platform that you create   That may be useful at times but hides your project s  dependency on widget jar almost completely

User · Answer

Project Files  Services Tabls  go files tabs  drag drop file to libs files hover   return project tabs and what are you see

User · Answer

You want to add libraries to your project and in doing so you have two options as you yourself identified    Compile-time libraries are libraries which is needed to compile your application  They are not included when your application is assembled  e g   into a war-file   Libraries of this kind must be provided by the container running your project    This is useful in situation when you want to vary API and implementation  or when the library is supplied by the container  which is typically the case with javax servlet which is required to compile but provided by the application server  e g   Apache Tomcat     Run-time libraries are libraries which is needed both for compilation and when running your project  This is probably what you want in most cases  If for instance your project is packaged into a war ear  then these libraries will be included in the package    As for the other alernatives you have either global libraries using Library Manageror jdk libraries  The latter is simply your regular java libraries  while the former is just a way for your to store a set of libraries under a common name  For all your future projects  instead of manually assigning the libraries you can simply select to import them from your Library Manager

[java] How to add a JAR in NetBeans

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