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[Solved!] Log into a server?


Gingerbreadman

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This is typical "try over and over again util you succed" case.

 

1. Setup ClientTickEvent and ClientDisconnectionFromServerEvent.

2. Create some static boolean "shouldAutoReconnect".

3. When you get DC, in your ClientDisconnectionFromServerEvent you can set boolean to true.

4. Use ClientTickEvent to check that boolean, then check current screen (instanceof GuiSomething).

5. Make whatever if statements you need and create some incrementation - make client try to reconnect every e.g 2sec (if conditions are met and you are not ingame) or whatever.

6. Done.

 

If you would need to directly know the moment when client faild to connect you can check if current screen displays error msg. Again - you need to do that per-tick with ClientTickEvent.

 

At least that''s what I'd do.

1.7.10 is no longer supported by forge, you are on your own.

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Just look at callbacks :P

 

In GuiMultiplayer:

private void connectToServer(ServerData server)
    {
        net.minecraftforge.fml.client.FMLClientHandler.instance().connectToServer(this, server);
    }

 

You could assume that you need GuiMultiplayer.

1.7.10 is no longer supported by forge, you are on your own.

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Just look at callbacks :P

 

In GuiMultiplayer:

private void connectToServer(ServerData server)
    {
        net.minecraftforge.fml.client.FMLClientHandler.instance().connectToServer(this, server);
    }

You could assume that you need GuiMultiplayer.

I keep getting a null pointer

 

java.lang.NullPointerException

at net.minecraft.client.Minecraft.runTick(Minecraft.java:1994) ~[Minecraft.class:?]

at net.minecraft.client.Minecraft.runGameLoop(Minecraft.java:1028) ~[Minecraft.class:?]

at net.minecraft.client.Minecraft.run(Minecraft.java:951) [Minecraft.class:?]

at net.minecraft.client.main.Main.main(Main.java:164) [Main.class:?]

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.7.0_71]

at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.7.0_71]

at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.7.0_71]

at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.7.0_71]

at net.minecraft.launchwrapper.Launch.launch(Launch.java:135) [launchwrapper-1.11.jar:?]

at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.11.jar:?]

at net.minecraftforge.gradle.GradleStartCommon.launch(Unknown Source) [start/:?]

at GradleStart.main(Unknown Source) [start/:?]

[02:51:33] [Client thread/INFO] [sTDOUT]: [net.minecraft.client.Minecraft:displayCrashReport:388]: ---- Minecraft Crash Report ----

// Ouch. That hurt :(

 

Time: 07/07/15 02:51

Description: Unexpected error

 

java.lang.NullPointerException: Unexpected error

at net.minecraft.client.Minecraft.runTick(Minecraft.java:1994)

at net.minecraft.client.Minecraft.runGameLoop(Minecraft.java:1028)

at net.minecraft.client.Minecraft.run(Minecraft.java:951)

at net.minecraft.client.main.Main.main(Main.java:164)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)

at java.lang.reflect.Method.invoke(Unknown Source)

at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)

at net.minecraft.launchwrapper.Launch.main(Launch.java:28)

at net.minecraftforge.gradle.GradleStartCommon.launch(Unknown Source)

at GradleStart.main(Unknown Source)

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*Ernio focuses on blank page with white-colored letters that supposed to be OP's code*

 

We are not wizards - post your code.

				FMLClientHandler.instance().setupServerList();//might be unnecessary
			FMLClientHandler.instance().connectToServer(new GuiMultiplayer(FMLClientHandler.instance().getClient().currentScreen), new ServerData("", Main.getConfigData().getIP() + ":" + Main.getConfigData().getPort()));

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Try using

FMLClientHandler#connectToServerAtStartup(hostAddress, port)

 

What it does is basically setupServerList and connectToServer, but also first pings the server for availability.

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This thread makes me sad because people just post copy-paste-ready code when it's obvious that the OP has little to no programming experience. This is not how learning works.

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I keep getting a nullpointer D:

 

java.lang.NullPointerException
at net.minecraft.client.Minecraft.runTick(Minecraft.java:1994) ~[Minecraft.class:?]
at net.minecraft.client.Minecraft.runGameLoop(Minecraft.java:1028) ~[Minecraft.class:?]
at net.minecraft.client.Minecraft.run(Minecraft.java:951) [Minecraft.class:?]
at net.minecraft.client.main.Main.main(Main.java:164) [Main.class:?]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.7.0_71]
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.7.0_71]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.7.0_71]
at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.7.0_71]
at net.minecraft.launchwrapper.Launch.launch(Launch.java:135) [launchwrapper-1.11.jar:?]
at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.11.jar:?]
at net.minecraftforge.gradle.GradleStartCommon.launch(Unknown Source) [start/:?]
at GradleStart.main(Unknown Source) [start/:?]

My code

FMLClientHandler.instance().connectToServerAtStartup(Main.getConfigData().getIP(), Integer.parseInt(Main.getConfigData().getPort()));

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Look at the line that the crash points to and figure out what is null there and what you are doing that is causing that.

at net.minecraft.launchwrapper.Launch.main(Launch.java:28)

^I think the nullpointer is caused because there is no arguments on line 28 at net.minecraft.launchwrapper.Launch.main?

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I will not write any more responses until you follow what I told you:

Look at the line that the crash points to and figure out what is null there and what you are doing that is causing that.

 

At least tell us what is null on that line so we can do your work for you.

EntityPlayer.itemInUse (ItemStack)

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Use a debugger.

instead of a nullpointer, now I am getting a runtime error

[15:52:20] [Timer-0/INFO] [sTDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: java.lang.RuntimeException: No OpenGL context found in the current thread.
Exception in thread "Timer-0" [15:52:20] [Timer-0/INFO] [sTDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: 	at org.lwjgl.opengl.GLContext.getCapabilities(GLContext.java:124)
[15:52:20] [Timer-0/INFO] [sTDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: 	at net.minecraft.client.gui.GuiMainMenu.<init>(GuiMainMenu.java:125)
[15:52:20] [Timer-0/INFO] [sTDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: 	at cpw.mods.fml.client.FMLClientHandler.connectToServerAtStartup(FMLClientHandler.java:806)
[15:52:20] [Timer-0/INFO] [sTDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: 	at net.RPD.BlazeBot.Bot$3.run(Bot.java:67)
[15:52:20] [Timer-0/INFO] [sTDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: 	at java.util.TimerThread.mainLoop(Unknown Source)
[15:52:20] [Timer-0/INFO] [sTDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: 	at java.util.TimerThread.run(Unknown Source)

and my event

	@SubscribeEvent
public void onDisconnect(ClientDisconnectionFromServerEvent e) {
	Timer t = new Timer();
	t.schedule(new TimerTask() {
		@Override
		public void run() {
			FMLClientHandler.instance().connectToServerAtStartup("192.168.1.8", 69);
		}
	}, 5000);
}

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This is typical "try over and over again util you succed" case.

 

1. Setup ClientTickEvent and ClientDisconnectionFromServerEvent.

2. Create some static boolean "shouldAutoReconnect".

3. When you get DC, in your ClientDisconnectionFromServerEvent you can set boolean to true.

4. Use ClientTickEvent to check that boolean, then check current screen (instanceof GuiSomething).

5. Make whatever if statements you need and create some incrementation - make client try to reconnect every e.g 2sec (if conditions are met and you are not ingame) or whatever.

6. Done.

 

If you would need to directly know the moment when client faild to connect you can check if current screen displays error msg. Again - you need to do that per-tick with ClientTickEvent.

 

At least that''s what I'd do.

Whats the name of the GUI screen of the actual game ingame?

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