> Hotswap on the JVM is very limited It mystifies me why this has not been integrated into Sun's/Oracle's JVM and OpenJDK, since it's been available in other J

> Hotswap on the JVM is very limited It mystifies me why this has not been integrated into Sun's/Oracle's JVM and OpenJDK, since it's been available in other JVM implementations for a long time and is so obviously a hugely useful feature – with the agonizingly slow startup of Java applications you really need code reloading at runtime. Anyway, the Android VM (ART) has Instant Run nowadays. It also doesn't support hot-swapping anything more than method implementations without restarting, but restarting on Android is not as painful as on the regular JVM. https://developer.android.com/studio/run/#instant-run https://developer.android.com/studio/run/#instant-run