You may freely edit this file. See commented blocks below for some examples of how to customize the build. (If you delete it and reopen the project it will be recreated.) default . Builds, tests, and runs the project . For list of available properties check the imported nbproject/build-impl.xml file. Another way to customize the build is by overriding existing main targets. The targets of interest are: -init-macrodef-javac: defines macro for javac compilation -init-macrodef-junit: defines macro for junit execution -init-macrodef-debug: defines macro for class debugging -init-macrodef-java: defines macro for class execution -do-jar-with-manifest: JAR building (if you are using a manifest) -do-jar-without-manifest: JAR building (if you are not using a manifest) run: execution of project -javadoc-build: Javadoc generation test-report: JUnit report generation An example of overriding the target for project execution could look like this: Notice that the overridden target depends on the jar target and not only on the compile target as the regular run target does. Again, for a list of available properties which you can use, check the target you are overriding in the nbproject/build-impl.xml file. ]]>