Beginning Programming with Java For Dummies, 6th Edition
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When I was a young object, I wasn’t as smart as the objects you have nowadays. Consider, for example, the object in the code below This object not only displays itself, but it can also fill itself with values.

importjava.util.Random;

importjava.text.NumberFormat;

import static java.lang.System.out;

classBetterAccount {

String lastName;

int id;

double balance;

void fillWithData() {

Random myRandom = new Random();

lastName = "" +

(char) (myRandom.nextInt(26) + 'A') +

(char) (myRandom.nextInt(26) + 'a') +

(char) (myRandom.nextInt(26) + 'a');

id = myRandom.nextInt(10000);

balance = myRandom.nextInt(10000);

}

void display() {

NumberFormat currency = NumberFormat.getCurrencyInstance();

out.print("The account with last name ");

out.print(lastName);

out.print(" and ID number ");

out.print(id);

out.print(" has balance ");

out.println(currency.format(balance));

}

}

Here’s a way to use the class in the code above. Check out the new code.

classProcessBetterAccounts {

public static void main(String args[]) {

BetterAccountanAccount;

for (int i = 0; i < 3; i++) {

anAccount = new BetterAccount();

anAccount.fillWithData();

anAccount.display();

}

}

}

The second set of code is pretty slick. Because the code in the first listing is so darn smart, the new code has very little work to do. This new code just creates a BetterAccount object and then calls the methods in the first listing of code.

About This Article

This article is from the book:

About the book author:

Barry Burd, PhD, is a veteran author and educator. At the University of Illinois, he was named five times to the university-wide List of Teachers Ranked as Excellent by their Students. He has written several books on Java and Android development.

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