directly accessing attribute of object when object is part of array

Question

I defined "class Product" with fields "price" and "sales".
Then, I created an array of type "Product": Product productArray[] = new Product[100]
Then I filled this array with data from an excel table containing 100 rows and 2 columns (column A: "price" , column B: "sales")

I want to directly access the price of different products, say the price of the product in row 97. That is, I would like to do something like Double variable = productArray[97].price

Is there a way of doing this in java ?

Help would be very much appreciated ! Thank you in advance.

Well, have you tried Double variable = productArray[97].price? Sounds like it should work. Maybe productArray[97].getPrice()? Also, beware that array are 0 indexed: row 1 is productArray[0]. — Tunaki
– Tunaki, Commented Sep 7, 2015 at 20:18
Have you tried it? It should work if price has the right access modifier. — uoyilmaz
– uoyilmaz, Commented Sep 7, 2015 at 20:23

RamanSB · Accepted Answer · 2015-09-07 20:49:50Z

1

You should create getter and setter methods for your variables as encapsulation is a good OOP concept to protect your variables.

Consider the following scenario which will be similar to what you are doing, you have a Product class.

I will use an alien class:

public class Alien{

//Properties of aliens
int numOfFingers;
String name;
String color;

public Alien(int num, String name, String color)
{
    this.numOfFingers = num;
    this.name = name;
    this.color = color;
}       

}//End of alien class

The class containing the array:

public class DetailExtractor {

//Arraycontaining alien objects
Alien[] alienRegister = new Alien[100];

public static void main(String[] args){
    //Populating the array
    alienRegister[0] = new Alien(3, "Zorg", "Blue");
    alienRegister[1] = new Alien(5, "Chad", "Purple");


    //Retrieving a property, say name of second alien...

    System.out.println(alienRegister[1].name);

}

}

edited Sep 7, 2015 at 20:49

answered Sep 7, 2015 at 20:44

RamanSB

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1 Comment

steady_progress Over a year ago

so my code should actually work ... then it didn't compile because of some other issue ... I thought it didn't work because of the "productArray[97].price"-part.

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