/** * @test 1.1 03/11/06 * @bug 4949279 * @summary Independent instantiations of Random() have distinct seeds. */ import java.util.Random; public class DistinctSeeds { public static void main(String[] args) throws Exception { // Strictly speaking, it is possible for these to be equal, // but the likelihood should be *extremely* small. if (new Random().nextLong() == new Random().nextLong()) throw new RuntimeException("Random seeds not unique."); } }