Creating a new thread is equally simple in Java:

    var thread = new Thread(() -> {
      // Thread code
    });
    thread.start();
    // ...
    thread.join();

Yes, but it's a good example of how Java is about twice as verbose to do the same work. The Ruby version of that can be written as simply:

Thread.new{ ... thread code ...}.join

The extra verboseness quickly adds up if every statement takes twice as much code.

Fair. I must admit that I'm not aware of the recent features of Java. Last time I really needed it was the time that we needed to instance an anonymous class for callbacks. I still find the block syntax in Ruby cleaner though.

Kotlin is another language that has this Ruby-style blocks for callbacks.