Peter Mangs, who was charged with one count of murder and five counts of attempted murder, denied he had anything to do with the shootings that began about a year ago, Swedish news agency Tidningarnas Telegrambyra reported.
About 70 people attended Tuesday's hearing in the security chamber of Malmo District Court.
The prosecutor in the case requested that details of the court proceedings not be revealed.
Mangs was arrested without incidence Saturday in a low-key raid by Malmo police.
Police said tests on at least one of the weapons licensed to Mangs matched bullet fragments found at one or more of the shootings he is suspected of committing.
Mangs father told the Aftonbladet daily his son "lived in fear of immigrants taking over Swedish society."