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POStoring data into Object Array Elements returns NullPointerException
 

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    <p>Code : </p> <pre><code>import java.io.*; class Customer { String name; int ID; int purchasequantity; double purchaseprice; Customer() { name = ""; ID = 0; purchasequantity = 0; purchaseprice = 0.0; } } </code></pre> <hr> <pre><code>class StoreSell { public static void main(String args[]) throws IOException { Customer[] cst = new Customer[3]; InputStreamReader isr = new InputStreamReader(System.in); BufferedReader br = new BufferedReader(isr); double totalAmount = 0; System.out.println("Size of Array " + cst.length); for (int i=0;i&lt;cst.length;i++) { System.out.println("Enter Customer Name : "); cst[i].name = br.readLine(); cst[i].ID = 100 + (i+1); System.out.println("Customer ID Generated is : "+cst[i].ID); System.out.println("Enter Purchase Price per Piece : "); //String price = br.readLine(); //System.out.println("Entered Price is " +price); cst[i].purchaseprice = Double.parseDouble(br.readLine()); System.out.println("Enter Purchase Quantity : "); cst[i].purchasequantity = Integer.parseInt(br.readLine()); } System.out.println(" Customer ID " + "Customer Name " + "Price Per Piece " + "Quntity " + "Bill Amount "); for(int i=0;i&lt;cst.length;i++) { System.out.print(cst[i].ID + " " +cst[i].name+" "+ cst[i].purchaseprice + " " + cst[i].purchasequantity); double tempAmount = StaticMethod.calculateStatic(cst[i].purchaseprice, cst[i].purchasequantity); totalAmount = totalAmount + tempAmount; System.out.println(" " + tempAmount); } System.out.println("Total Sell of the day : Amount : " + totalAmount); } } </code></pre> <p>Output : </p> <pre><code>Size of Array 3 Enter Customer Name : Nirav Exception in thread "main" java.lang.NullPointerException at StoreSell.main(StoreSell.java:38) </code></pre> <p>Explanation : </p> <ol> <li>The said program doesn't throw any compilation error.</li> <li>While running the program, when data is entered on console for Name, it is able to fetch the data from console, but not able to store into array object.</li> <li>I have tried to store the data retrieved from Console into a temp variable (Not an array element), and it stores correctly.</li> <li>Hence, I can conclude that the problem occurs only when it tries to store data into an array object.</li> <li>However, array is created successfully. I have tried to print the array length. and it gives correct length.. 3.</li> </ol> <p>Please help me on this, I have tried to google lot on it, but not able to find any fix for the same.</p>
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    1. USskaffman
    1. USNirav Khandhedia
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      1. USAdam Mendoza
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