MCLauncherW.MainWindow.javaAutoDetect C# (CSharp) Method

        private string javaAutoDetect()
        {
            RegistryKey pregkey;
            string findJavaPath = string.Empty;

            pregkey = Registry.LocalMachine.OpenSubKey("SOFTWARE\\JavaSoft\\Java Runtime Environment", false);
            if (pregkey == null)
            {
                return findJavaPath;
            }
            else
            {
                string javaVersion = pregkey.GetValue("CurrentVersion", "0").ToString();
                pregkey = Registry.LocalMachine.OpenSubKey("SOFTWARE\\JavaSoft\\Java Runtime Environment\\" + javaVersion, false);
                if (pregkey == null)
                {
                    return findJavaPath;
                }
                else
                {
                    string javaPath = pregkey.GetValue("JavaHome", "0").ToString();
                    string javaw = javaPath + "\\" + "bin\\javaw.exe";
                    if (javaw.Contains(" (x86)"))
                    {
                        string java64w = javaw.Replace(" (x86)", "");
                        if (File.Exists(java64w))
                        {
                            findJavaPath = java64w;
                        }
                        else
                            if (File.Exists(javaw))
                            {
                                findJavaPath = javaw;
                            }
                            else
                            {
                                findJavaPath = string.Empty;
                            }
                    }
                    else
                    {
                        if (File.Exists(javaw))
                        {
                            findJavaPath = javaw;
                        }
                        else
                        {
                            findJavaPath = string.Empty;
                        }
                    }
                }
            }
            pregkey.Close();
            return findJavaPath;
        }