1. package example.mymod01;
3. import net.minecraftforge.fml.common.Mod;
4. import net.minecraftforge.fml.common.Mod.EventHandler;
5. import net.minecraftforge.fml.common.event.FMLInitializationEvent;
7. @Mod(modid = MyMod01.MODID, version = MyMod01.VERSION)
8. public class MyMod01 {
9. public static final String MODID = "mymod01";
10. public static final String VERSION = "0";
12. @EventHandler
13. public void init(FMLInitializationEvent e) {
14. System.out.println("============DEBUG before pref4:"
15. + System.getProperty("java.net.preferIPv4Stack") + " pref6:" + System.getProperty("java.net.preferIPv6Stack"));
16. System.setProperty("java.net.preferIPv4Stack", "false");
17. System.setProperty("java.net.preferIPv6Stack", "true");
18. System.out.println("============DEBUG after pref4:"
19. + System.getProperty("java.net.preferIPv4Stack") + " pref6:" + System.getProperty("java.net.preferIPv6Stack"));
20. }
21. }
23. /* Output:
24. ...
25. [20:55:16] [Client thread/INFO] [STDOUT]: [example.mymod01.MyMod01:init:19]: ============DEBUG before pref4:true pref6:null
26. [20:55:16] [Client thread/INFO] [STDOUT]: [example.mymod01.MyMod01:init:23]: ============DEBUG after pref4:false pref6:true
27. ...
28. (then I try connecting)
29. ...
30. [20:55:49] [Client thread/INFO]: Connecting to XXXX:XXXX:XXXX:XXXX:XXXX:XXXX:XXXX:XXXX, 25565
31. [20:56:11] [Server Connector #1/ERROR]: Couldn't connect to server
32. java.net.ConnectException: Connection timed out: no further information: /XXXX:XXXX:XXXX:XXXX:XXXX:XXXX:XXXX:XXXX:25565
33. at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method) ~[?:1.8.0_72]
34. at sun.nio.ch.SocketChannelImpl.finishConnect(Unknown Source) ~[?:1.8.0_72]
35. at io.netty.channel.socket.nio.NioSocketChannel.doFinishConnect(NioSocketChannel.java:208) ~[NioSocketChannel.class:4.0.23.Final]
36. at io.netty.channel.nio.AbstractNioChannel$AbstractNioUnsafe.finishConnect(AbstractNioChannel.java:287) ~[AbstractNioChannel$AbstractNioUnsafe.class:4.0.23.Final]
37. at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:528) ~[NioEventLoop.class:4.0.23.Final]
38. at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:468) ~[NioEventLoop.class:4.0.23.Final]
39. at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:382) ~[NioEventLoop.class:4.0.23.Final]
40. at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:354) ~[NioEventLoop.class:4.0.23.Final]
41. at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:116) ~[SingleThreadEventExecutor$2.class:4.0.23.Final]
42. at java.lang.Thread.run(Unknown Source) ~[?:1.8.0_72]
43. ...
44. */