This tool allows to run NetBeans Java code checker without the NetBeans IDE. This includes running the custom Java hints specified in META-INF/upgrade/*.hint.
- Apache NetBeans 28
- JDK 17, JDK 21 and JDK 25
- bash
- Apache ant 1.9.9 or above
- Apache Maven 3.3.9 or above
- JDK 17-25
Build using:
$ ant -DNETBEANS_PLATFORM=<path-to-NetBeans-28> -DJDK17=<path-to-JDK-17> -DJDK21=<path-to-JDK-21> -DJDK25=<path-to-JDK25> build-and-test
The built product is in tool/build/jackpot.
Run using:
$ jackpot <options> <files-to-inspect>
To get help on the options, run:
$ jackpot --help
Consider this sample code:
package test;
public class Test {
public void test(boolean b) {
int i = 0;
if (b)
System.err.println("was true");
assert (i = 1) == 1;
}
}
It is possible to get a warning for the improper indentation like this:
$ jackpot --hint "Confusing indentation" <somedir>/src
<somedir>/src/test/Test.java:9: warning: [Confusing_indentation] Confusing indentation
assert (i = 1) == 1;
^
Or a warning for the side-effects inside the assert:
$ jackpot --hint "Assert with side effects" <somedir>/src
<somedir>/src/test/Test.java:9: warning: [Assert_with_side_effects] Assert condition produces side effects
assert (i = 1) == 1;
^
All supported hints can be listed using:
$ jackpot --list
It is also possible to use a configuration file which enables multiple hints at once using:
$ jackpot --config-file <path-to-config-file> <path-to-sources-to-check>
The config file can be generated by the NetBeans IDE, using Project Properties/Hints, or similar ways.