These days you bundle everything with Java apps too. Or at least that's the direction the JVM authors want people to go in (see: jlink and jpackage). It's not

These days you bundle everything with Java apps too. Or at least that's the direction the JVM authors want people to go in (see: jlink and jpackage). It's not a single binary like Go, but in practice that's rarely an issue. Most normal programs have more than one file making them up.