DALVIK VIRTUAL MACHINE IN ANDROID OS

Dalvik Virtual Machine

The Dalvik virtual machine is simple Java interpreter machine, completely optimized for Android

platform and which is developed to run on low-end memory mobile devices. One of the prominent aspects in Dalvik its capability to run along an application compilation enhancing the runtime performance of the applications.
Dalvik is not exactly, a Java machine, because Dalvik could not read Java code, but consists its own byte code called “dex” and so the executable files compacted using Dalvik holds the file type name '.dex'. Google states that the credit for Androids successful development goes to Dalvik VM, because this type of virtual machine, delivers a good performance over various stages of an application runtime environment, conserving more battery-power during long run of an application.

A small drawback with Dalvik, is its none-compatibility with Java SE libraries, Java ME class libraries and Swing Java libraries, while they cannot be and need not to-be run directly on this virtual machine. It uses its own Apache Harmony Java implementation libraries. Despite of the earlier reason, its escalated Android's value proposition due to its minimal-electrical power consumption, vast library resources, and non-fragmentary application programming interface, unlike its Java rivals. Java related brands and trademarks are owned by Sun Micro Systems Inc., which is soon to be acquired by Oracle Corporation. Another significant fact that assures the open source status of Android, is that Sun Corp, cannot claim on the usage of Java-like programming language, since Android uses a Java Virtual execution environment developed by Google.