我想在 VB.Net 中为我和我的 friend 创建我自己的 Minecraft 启动器。我有这段代码，它为我提供了访问 token 。

Private ACCESS_TOKEN As String 
Public Function GetAccessToken() As String 
    Return ACCESS_TOKEN 
End Function 
Public Sub ObtainAccessToken() 
    Dim username As String = TextBox1.Text 
    Dim password As String = TextBox2.Text 
    Dim UUID As String = Guid.NewGuid.ToString() 
    Dim httpWebRequest = DirectCast(WebRequest.Create("https://authserver.mojang.com/authenticate"), HttpWebRequest) 
    httpWebRequest.ContentType = "application/json" 
    httpWebRequest.Method = "POST" 
 
    Using streamWriter = New StreamWriter(httpWebRequest.GetRequestStream()) 
        Dim json As String = (Convert.ToString((Convert.ToString("{""agent"":{""name"":""Minecraft"",""version"":1},""username"":""") & username) + """,""password"":""") & password) + """,""clientToken"":" & ControlChars.Quote & UUID & ControlChars.Quote & "}" 
 
        streamWriter.Write(json) 
        streamWriter.Flush() 
        streamWriter.Close() 
 
        Dim httpResponse = DirectCast(httpWebRequest.GetResponse(), HttpWebResponse) 
        Using streamReader = New StreamReader(httpResponse.GetResponseStream()) 
            Dim result = streamReader.ReadToEnd() 
            ACCESS_TOKEN = result 
        End Using 
    End Using 
End Sub 

但是我可以用这个访问 token 做什么？如何使用java参数直接启动minecraft？我想启动minecraft.jar文件。

请您参考如下方法:

在.minecraft文件夹中，所有参数都在version.json中

这是 1.8.8 版本 (.minecraft/versons/1.8.8) 中的 json 片段

"id": "1.8.8", 
"time": "2016-06-01T07:45:48-04:00", 
"releaseTime": "2015-07-27T06:31:28-04:00", 
"type": "release", 
"minecraftArguments": "--username ${auth_player_name} --version ${version_name} --gameDir ${game_directory} --assetsDir ${assets_root} --assetIndex ${assets_index_name} --uuid ${auth_uuid} --accessToken ${auth_access_token} --userProperties ${user_properties} --userType ${user_type}" 

参数位于“minecraftArguments”下，jar 文件位于同一目录中，名为 1.8.8.jar。