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Java Stack and Heap: Java Memory Allocation Lesson.

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    Stack Memory   Stack in java is a section of memory which contains methods, local variables, and reference variables. Local variables are created in the stack. Java Stack memory is used for the execution of a thread. They contain method-specific values that are short-lived and references to other objects in the heap that is getting referred from the method. Stack  memory is always referenced in  LIFO (Last-In-First-Out)  order. Whenever a method is invoked, a new block is created in the stack memory for the method to hold local primitive values and reference to other objects in the method. As soon as the method ends, the block becomes unused and becomes available for the next method. Stack memory size is very less compared to Heap memory. Key Features of Stack Memory Apart from what we have discussed so far, following are some other features of  Stack  memory: It grows and shrinks as new methods are called and returned respectiv...
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What is JVM, JDK and JRE in Java?

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What is JVM? Java Virtual machine  (JVM) is the virtual machine that runs the Java bytecodes. You get this bytecode by compiling the  .java  files into  .class  files.  .class  files contain the bytecodes understood by the JVM.   In the real world, JVM is a specification that provides a runtime environment in which Java bytecode can be executed. Different vendors provide different implementations of this specification. For example, this wiki page lists down different JVM implementations. Most popular implementation of JVM is Hotspot which is owned and provided by Oracle Corporation. ( Previously by Sun Microsystems, Inc. ). JVM delivers the optimal performance for Java applications using many advanced techniques, incorporating a state-of-the-art memory model,  garbage collector , and  adaptive optimizer . JVM comes in two different flavors –  client  and  server . Although the Server and the Client VMs ar...
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How To Set Getters And Setters Method In java Using Eclipse?

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1.First create a new class in your project. 2.Then set variables. package com.Bean; public class Services { private int id; private String services; } 3.Right click inside the curly braces.                                           select source and go to getters and setters method. 5.select all terms then click on generate. 6.Generate successfully.
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