public class Test{

    public static String prefix = ChatColor.GREEN + "Network " + ChatColor.DARK_GREEN + "➠ " + ChatColor.GRAY;
    public static String errorPrefix = ChatColor.RED + "Network " + ChatColor.DARK_RED + "➠ " + ChatColor.GRAY;

    public void onEnable(){
        //blabla
    }

    public boolean onCommand(){
        player.sendMessage(prefix + "Alles in Ordnung!");
        player.sendMessage(errorPrefix + "Alles ist schief gegangen!");
    }
}