Instance main methods and unnamed classes, coming in Java 21, will forever change how developers learn Java and bootstrap applications. Why? They provide a simple, clean and concise syntax to launch ...

Must qualify the allocation with an enclosing instance of type GameTree (e.g. x.new A() where x is an instance of GameTree). GameTree.java line 146</pre> ...

import java.util.concurrent.ExecutorService ... But there is a very high chance that we will end up with two instances due to the Thread.sleep method. Now, looking at the code again, notice ...