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  1. abstract class Account {
  2.     protected int accountNumber;
  3.     protected double balance;
  4.  
  5.     public Account(int accountNumber) {
  6.         this.accountNumber = accountNumber;
  7.         this.balance = 0.0;
  8.     }
  9.  
  10.     public void setBalance(double balance) {
  11.         this.balance = balance;
  12.     }
  13.  
  14.     public abstract int getAccountNumber();
  15.     public abstract double getBalance();
  16. }
  17.  
  18. class Checking extends Account {
  19.  
  20.     public Checking(int accountNumber) {
  21.         super(accountNumber);
  22.     }
  23.  
  24.     @Override
  25.     public int getAccountNumber() {
  26.         return accountNumber;
  27.     }
  28.  
  29.     @Override
  30.     public double getBalance() {
  31.         return balance;
  32.     }
  33.  
  34.     public void display() {
  35.         System.out.println("Checking Account Information " + accountNumber + " $" + balance);
  36.     }
  37. }
  38.  
  39. class Savings extends Account {
  40.     private double interestRate;
  41.  
  42.     public Savings(int accountNumber, double interestRate) {
  43.         super(accountNumber);
  44.         this.interestRate = interestRate;
  45.     }
  46.  
  47.     @Override
  48.     public int getAccountNumber() {
  49.         return accountNumber;
  50.     }
  51.  
  52.     @Override
  53.     public double getBalance() {
  54.         return balance;
  55.     }
  56.  
  57.     public void display() {
  58.         System.out.println("Savings Account Information " + accountNumber + " $" + balance + " rate " + interestRate);
  59.     }
  60. }
  61.  
  62. public class Main {
  63.     public static void main(String[] args) {
  64.         Account[] accounts = new Account[10];
  65.  
  66.         int checkingNum = 101;
  67.         int savingsNum = 201;
  68.  
  69.         for (int i = 0; i < accounts.length; i++) {
  70.             if (i % 2 == 0) {
  71.                 accounts[i] = new Checking(checkingNum);
  72.                 checkingNum++;
  73.             } else {
  74.                 double rate = 2.0 + (i * 0.1);
  75.                 accounts[i] = new Savings(savingsNum, rate);
  76.                 savingsNum++;
  77.             }
  78.         }
  79.  
  80.         for (Account acc : accounts) {
  81.             if (acc instanceof Checking) {
  82.                 ((Checking) acc).display();
  83.             } else if (acc instanceof Savings) {
  84.                 ((Savings) acc).display();
  85.             }
  86.         }
  87.     }
  88. }
Success #stdin #stdout 0.29s 60868KB
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Checking Account Information 101 $0.0
Savings Account Information 201 $0.0 rate 2.1
Checking Account Information 102 $0.0
Savings Account Information 202 $0.0 rate 2.3
Checking Account Information 103 $0.0
Savings Account Information 203 $0.0 rate 2.5
Checking Account Information 104 $0.0
Savings Account Information 204 $0.0 rate 2.7
Checking Account Information 105 $0.0
Savings Account Information 205 $0.0 rate 2.9
https://ideone.com/JFrsG2
language:
Java (HotSpot 12)
created:
1 day ago
visibility:
public

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