j.l.ProcessBuilder.redirectX(ProcessBuilder.Redirect) and j.l.ProcessBuilder.redirectX(File) throw unspecified NPE id argument is null.

Minimized test:
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public class Test {

    public static void main(String[] args) {
        for(RedirectTest test : tests) {
            try {
                test.test();
                System.out.println("OK");
            } catch (NullPointerException e) {
                System.out.println("NPE");
            }
        }
    }

    private static RedirectTest[] tests = new RedirectTest[] {
        (RedirectTest) () -> new ProcessBuilder().redirectInput((ProcessBuilder.Redirect) null),
        (RedirectTest) () -> new ProcessBuilder().redirectOutput((ProcessBuilder.Redirect) null),
        (RedirectTest) () -> new ProcessBuilder().redirectError((ProcessBuilder.Redirect) null),
        (RedirectTest) () -> new ProcessBuilder().redirectInput((File) null),
        (RedirectTest) () -> new ProcessBuilder().redirectOutput((File) null),
        (RedirectTest) () -> new ProcessBuilder().redirectError((File) null)
    };

    interface RedirectTest {
        void test();
    }
}
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Output will be:
-------------------------------------------------------------------------------------
NPE
NPE
NPE
-------------------------------------------------------------------------------------

JCK tests are under development.