Ringosham

If you wanted to send chat messages from the mod to the server(Without the server handling the message. All client sided), I think the method is sendChatMessage instead of addChatMessage. Ernio is right. You need to learn some basics before modding.

Interesting, that worked in the previous versions...... Oh well, thanks for the help. (Now I feel kinda dumb.)

This only happened on 1.9. Here's what I am trying to do. private boolean msgShown = false; @SubscribeEvent public void onTick(TickEvent.PlayerTickEvent event) { if (!msgShown) { event.player.addChatMessage(new TextComponentString("Text 1")); Minecraft.getMinecraft().thePlayer.addChatMessage(new TextComponentString("Text 2")); msgShown = true; } } Both of these lines work in 1.7.10 - 1.8.9. But in 1.9 I got NullPointerException with Ticking player when opening a world. I don't really know why it doesn't work. I'm using the latest version of Forge for 1.9 I'll post the log if you need to.

I was trying to intercept any outgoing chat messages by changing the EntityClientPlayerMP.sendChatMessage I know that there is a way to do that with some networking(or SimpleNetworkWrapper/netty/whatever) stuff as you told me before, but the methods I found in the tutorials doesn't seem that there are answers. I found tutorials about sending and receiving packets from and to servers, but I cannot seem to find anything from catching outbound packets.

I tried to learn about access transformers. I coded a few classes and I was about to test it, but I was unable to launch Minecraft at all and it doesn't seem the error comes from my injection. I ended up with ClassNotFoundException with net.minecraftforge.transformers.ForgeAccessTransformer and weirdly I can find the class in the forge Jar. Here's my run configurations: VM args: -Dfml.ignoreInvalidMinecraftCertificates=true -Dfml.coreMods.load=com.ringosham.transform.TransformerPlugin Program args: --version 1.7.10 --tweakClass cpw.mods.fml.common.launcher.FMLTweaker --accessToken modTest --userProperites {} --username Ringowhs --assetIndex 1.7.10 --assetsDir C:\Users\*USERNAME*\.gradle\caches\minecraft\assets Here's the whole error. I tried refreshing dependencies with gradle and it still doesn't work. This mod originally does not use transformers at all and it runs well in Eclipse. I probably did something stupid that I don't know, but please help me. [00:55:36] [main/ERROR] [LaunchWrapper]: A critical problem occurred registering the ASM transformer class net.minecraftforge.transformers.ForgeAccessTransformer java.lang.ClassNotFoundException: net.minecraftforge.transformers.ForgeAccessTransformer at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:191) ~[launchwrapper-1.12.jar:?] at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_73] at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_73] at net.minecraft.launchwrapper.LaunchClassLoader.registerTransformer(LaunchClassLoader.java:88) [launchwrapper-1.12.jar:?] at cpw.mods.fml.common.launcher.FMLDeobfTweaker.injectIntoClassLoader(FMLDeobfTweaker.java:32) [forgeSrc-1.7.10-10.13.4.1614-1.7.10.jar:?] at net.minecraft.launchwrapper.Launch.launch(Launch.java:115) [launchwrapper-1.12.jar:?] at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.12.jar:?] at net.minecraftforge.gradle.GradleStartCommon.launch(Unknown Source) [start/:?] at GradleStart.main(Unknown Source) [start/:?] Caused by: java.lang.ClassCircularityError: scala/actors/threadpool/Arrays at com.ringosham.transform.TransformerClass.transform(TransformerClass.java:28) ~[bin/:?] at net.minecraft.launchwrapper.LaunchClassLoader.runTransformers(LaunchClassLoader.java:279) ~[launchwrapper-1.12.jar:?] at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:176) ~[launchwrapper-1.12.jar:?] ... 8 more [00:55:36] [main/INFO] [sTDOUT]: [cpw.mods.fml.common.launcher.FMLDeobfTweaker:injectIntoClassLoader:49]: A CRITICAL PROBLEM OCCURED INITIALIZING MINECRAFT - LIKELY YOU HAVE AN INCORRECT VERSION FOR THIS FML [00:55:36] [main/ERROR] [LaunchWrapper]: Unable to launch java.lang.RuntimeException: java.lang.ClassNotFoundException: cpw.mods.fml.common.Loader at cpw.mods.fml.common.launcher.FMLDeobfTweaker.injectIntoClassLoader(FMLDeobfTweaker.java:50) ~[forgeSrc-1.7.10-10.13.4.1614-1.7.10.jar:?] at net.minecraft.launchwrapper.Launch.launch(Launch.java:115) [launchwrapper-1.12.jar:?] at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.12.jar:?] at net.minecraftforge.gradle.GradleStartCommon.launch(Unknown Source) [start/:?] at GradleStart.main(Unknown Source) [start/:?] Caused by: java.lang.ClassNotFoundException: cpw.mods.fml.common.Loader at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:191) ~[launchwrapper-1.12.jar:?] at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_73] at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_73] at java.lang.Class.forName0(Native Method) ~[?:1.8.0_73] at java.lang.Class.forName(Unknown Source) ~[?:1.8.0_73] at cpw.mods.fml.common.launcher.FMLDeobfTweaker.injectIntoClassLoader(FMLDeobfTweaker.java:39) ~[forgeSrc-1.7.10-10.13.4.1614-1.7.10.jar:?] ... 4 more Caused by: java.lang.ClassCircularityError: scala/actors/threadpool/Arrays at com.ringosham.transform.TransformerClass.transform(TransformerClass.java:28) ~[bin/:?] at net.minecraft.launchwrapper.LaunchClassLoader.runTransformers(LaunchClassLoader.java:279) ~[launchwrapper-1.12.jar:?] at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:176) ~[launchwrapper-1.12.jar:?] at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_73] at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_73] at java.lang.Class.forName0(Native Method) ~[?:1.8.0_73] at java.lang.Class.forName(Unknown Source) ~[?:1.8.0_73] at cpw.mods.fml.common.launcher.FMLDeobfTweaker.injectIntoClassLoader(FMLDeobfTweaker.java:39) ~[forgeSrc-1.7.10-10.13.4.1614-1.7.10.jar:?] ... 4 more Exception in thread "main" [00:55:36] [main/INFO] [sTDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: cpw.mods.fml.relauncher.FMLSecurityManager$ExitTrappedException [00:55:36] [main/INFO] [sTDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: at cpw.mods.fml.relauncher.FMLSecurityManager.checkPermission(FMLSecurityManager.java:25) [00:55:36] [main/INFO] [sTDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: at java.lang.SecurityManager.checkExit(Unknown Source) [00:55:36] [main/INFO] [sTDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: at java.lang.Runtime.exit(Unknown Source) [00:55:36] [main/INFO] [sTDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: at java.lang.System.exit(Unknown Source) [00:55:36] [main/INFO] [sTDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: at net.minecraft.launchwrapper.Launch.launch(Launch.java:138) [00:55:36] [main/INFO] [sTDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [00:55:36] [main/INFO] [sTDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: at net.minecraftforge.gradle.GradleStartCommon.launch(Unknown Source) [00:55:36] [main/INFO] [sTDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: at GradleStart.main(Unknown Source)

Oh wow, that is surprisingly difficult(However, I will attempt to try it.). Thanks for telling me that!

Is there a way to change what the player types in the chat? For example, if the player types "Hello world", the chat shows "<Player> Nice to meet you" instead after the player pressed enter. I'm planning to make this mod client sided too.