How to resolve the algorithm Memory allocation step by step in the Java programming language
Published on 12 May 2024 09:40 PM
How to resolve the algorithm Memory allocation step by step in the Java programming language
Table of Contents
Problem Statement
Show how to explicitly allocate and deallocate blocks of memory in your language. Show access to different types of memory (i.e., heap, stack, shared, foreign) if applicable.
Let's start with the solution:
Step by Step solution about How to resolve the algorithm Memory allocation step by step in the Java programming language
1. Object Allocation and Scope:
- The
foo
variable is assigned a reference to a newly createdObject
. - The
fooArray
variable is assigned a reference to a newly created array ofsize
integers. - The
x
variable is assigned an integer value of0
.
2. Garbage Collection:
- The objects created in step 1 will be automatically deallocated when the program exits their scope and there are no more references to them.
- This process is handled by Java's garbage collection mechanism.
3. Finalization:
- The
Blah
class defines afinalize()
method, which is called when an object of that class is about to be deallocated. - The
finalize()
method can be used to perform any necessary cleanup tasks, such as releasing resources or closing streams. - However, it's not guaranteed that
finalize()
will always be called before an object is deallocated, so it shouldn't be relied upon for critical tasks.
4. Overriding Finalize Method (Example "NoFinalize"):
- The
NoFinalize
class defines afinalize()
method that overrides the defaultfinalize()
method. - When the
NoFinalize
object is created, it prints "created" to the console. - When the
NoFinalize
object is about to be deallocated, it prints "finalized" to the console. - This demonstrates the use of
finalize()
for custom cleanup tasks. However, as mentioned earlier, it's not recommended to rely onfinalize()
for critical tasks.
Source code in the java programming language
//All of these objects will be deallocated automatically once the program leaves
//their scope and there are no more pointers to the objects
Object foo = new Object(); //Allocate an Object and a reference to it
int[] fooArray = new int[size]; //Allocate all spaces in an array and a reference to it
int x = 0; //Allocate an integer and set its value to 0
public class Blah{
//...other methods/data members...
protected void finalize() throws Throwable{
//Finalization code here
}
//...other methods/data members...
}
public class NoFinalize {
public static final void main(String[] params) {
NoFinalize nf = new NoFinalize();
}
public NoFinalize() {
System.out.println("created");
}
@Override
protected void finalize() {
System.out.println("finalized");
}
}
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