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Inside the Java virtual machine by Bill Venners

Inside the Java virtual machine Bill Venners ebook
ISBN: 0071350934, 9780071350938
Page: 703
Publisher: McGraw-Hill Companies
Format: chm

Unlike C or C++, Java lives inside a JVM and cannot access low-level, machine-specific details. It visualizes metrics that are taken from low level instrumentation points inside of the browser and analyzes them as your application runs. The lifetime of a class and an object. Executing the class's class init method, if it has one. Goal of java "Write once and run anywhere " is not possible without JVM .One and only reason why java can be platform . Initialization of a class consists of two steps: init its direct super class, it its direct super class hasn't already inited. While we are discussing about JAVA , Discussion of JVM is come by default. Brian: The implementation of lambda expressions leans heavily on invokedynamic, introduced in Java SE 7. The heap contains nothing but objects.Arrays reside on the heap, including arrays of primitive types, but in Java, arrays are objects too. One of the key merits of isolating Java inside a JVM is safety -- the JVM can crash, but it won't bring the whole system down. JVM is the heart of JAVA Technology . HEAP - There is only one heap inside the JVM, and all threads share it. Inside the Java virtual machine, threads come in two flavors: daemon and non- daemon. Diagnostic commands are "helper routines inside the JVM" that produce "text output." They can be executed via the jcmd utility (and soon via JMX). Inside Java Virtual machine:- as the name suggests it is a virtual machine run as java process which talks to physical machine. A daemon thread is ordinarily a thread used by the virtual machine itself, such as a thread that performs garbage collection.