I was trying to launch my 1.21 server and it returned this error [18:17:22] [ERROR] [FabricLoader/]: Uncaught exception in thread "main" java.lang.RuntimeException ...

This is accomplished by spawning a new master Thread instance and passing the SwingThreadGroup instance with a Runnable implementation, which executes the entire main program. All Thread instances ...

IllegalArgumentException: can't parse argument number: 4 at java.base/java.text.MessageFormat.makeFormat(MessageFormat.java:1454)at java.base/java.text.MessageFormat ...

We will get the message: “java.lang.ArrayIndexOutOfBoundsException: 10” See also: Java beginner course – A free and comprehensive guide to the basics of Java ...