Desktop: open(File file)
import java.awt.Desktop; import java.io.File; import java.io.IOException; public class Main { public static void main(String[] a) { try { Desktop desktop = null; if (Desktop.isDesktopSupported()) { desktop = Desktop.getDesktop(); } desktop.open(new File("c:\\a.txt")); } catch (IOException ioe) { ioe.printStackTrace(); } } }