public ExampleMod() {
        FMLJavaModLoadingContext.get().getModEventBus().addListener(this::setup);
        FMLJavaModLoadingContext.get().getModEventBus().addListener(this::enqueueIMC);
        FMLJavaModLoadingContext.get().getModEventBus().addListener(this::processIMC);
        FMLJavaModLoadingContext.get().getModEventBus().addListener(this::doClientStuff);
        
        MinecraftForge.EVENT_BUS.register(this);
        
        EventNetworkChannel channel = NetworkRegistry.ChannelBuilder
    			.named(new ResourceLocation("space", "a"))
    			.clientAcceptedVersions(PROTOCOL_VERSION::equals)
    			.serverAcceptedVersions(PROTOCOL_VERSION::equals)
    			.networkProtocolVersion(() -> PROTOCOL_VERSION)
    			.eventNetworkChannel();
        channel.registerObject(this);
        channel.addListener(this::onClientPacket);

    }
    
    
	public void onClientPacket(NetworkEvent.ClientCustomPayloadEvent evt){
		byte[] b = new byte[evt.getPayload().readableBytes()];
		evt.getPayload().getBytes(0, b);
		System.out.println(b);
		//String s = new String(b,"utf-8");
	}

I tried to use this method to receive pluginmessage from the server, but it doesn't work

 

 

 

Edited June 13, 20196 yr by LK520

This is what the console outputs:

[20:07:10.225] [Netty Client IO #0/DEBUG] [ne.mi.fm.ne.FMLHandshakeHandler/FMLHANDSHAKE]: Starting new vanilla network connection.
[20:07:10.491] [Netty Client IO #0/DEBUG] [ne.mi.fm.ne.NetworkRegistry/NETREGISTRY]: Channel 'fml:loginwrapper' : Vanilla acceptance test: ACCEPTED
[20:07:10.491] [Netty Client IO #0/DEBUG] [ne.mi.fm.ne.NetworkRegistry/NETREGISTRY]: Channel 'fml:handshake' : Vanilla acceptance test: ACCEPTED
[20:07:10.491] [Netty Client IO #0/DEBUG] [ne.mi.fm.ne.NetworkRegistry/NETREGISTRY]: Channel 'fml:play' : Vanilla acceptance test: ACCEPTED
[20:07:10.491] [Netty Client IO #0/DEBUG] [ne.mi.fm.ne.NetworkRegistry/NETREGISTRY]: Channel 'space:a' : Vanilla acceptance test: REJECTED
[20:07:10.492] [Netty Client IO #0/ERROR] [ne.mi.fm.ne.NetworkRegistry/NETREGISTRY]: Channels [space:a] rejected vanilla connections