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 created Object.
  • The fooArray variable is assigned a reference to a newly created array of size integers.
  • The x variable is assigned an integer value of 0.

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 a finalize() 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 a finalize() method that overrides the default finalize() 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 on finalize() 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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