Question

/*Design a class BankAccount that has the following properties:
 * Account Number (should be static and increased every time an account is created.
 * An array of holders max 5 and a holder is a Person object 
 * A int to rember how many holders
 * Balance (float) 
 * Date opened 
 * interest rate
 * Constructors 
 * addHolder will add one more Person as a holder, if you reach 5 don't add. 
 * Setters getters
 * method payInterest that add interest to the accoun t
 * method Deposit(float )
 * method Withdraw(float)
 * toString() 
 * 
 */
public class BankAccount {
        
        public String toString() {
                String st = "";
                //keep adding to it whatever you need 
                
                return st;
        }
}

Answer 1

Note: Could you plz go through this code and let me know if u need any changes in this.Thank You
_________________

// Person.java

public class Person {
   private String name;
   private int age;

   public Person(String name, int age) {
       this.name = name;
       this.age = age;
   }

   public String getName() {
       return name;
   }

   public void setName(String name) {
       this.name = name;
   }

   public int getAge() {
       return age;
   }

   public void setAge(int age) {
       this.age = age;
   }

   @Override
   public String toString() {
       return "Name=" + name + ", Age=" + age;
   }

}

________________________

// BankAccount.java

import java.util.Date;

public class BankAccount {
   private static int accountNumber;
   private Person holders[] = new Person[5];;
   private int cntHolders=0;
   private float balance;
   private Date dateOpened;
   private float interestRate;

   public BankAccount(float balance, float interestRate) {
  
       this.cntHolders = 0;
       this.balance = balance;
       this.dateOpened = new Date();
       this.interestRate = interestRate;
       accountNumber = 1111;
   }

   public void addHolder(Person p) {
       if(cntHolders<holders.length)
       {
       this.holders[cntHolders] = p;
       cntHolders++;
       }
   }

   public static int getAccountNumber() {
       return accountNumber;
   }

   public Person[] getHolders() {
       return holders;
   }

   public int getCntHolders() {
       return cntHolders;
   }

   public float getBalance() {
       return balance;
   }

   public Date getDateOpened() {
       return dateOpened;
   }

   public float getInterestRate() {
       return interestRate;
   }

   public void setInterestRate(float interestRate) {
       this.interestRate = interestRate;
   }

   public void payInterest() {
       this.balance = balance + balance * (interestRate / 100);
   }

   public void deposit(float amt) {
       this.balance += amt;
   }

   public void withdraw(float amt) {
       if (balance - amt >= 0)
           this.balance -= amt;
   }
   public String toString() {
String st = "";
//keep adding to it whatever you need
for(int i=0;i<cntHolders;i++)
{
   st+="Name :"+holders[i].getName()+" Age :"+holders[i].getAge()+"\n";
st+="Account Number :"+accountNumber+"\n";
accountNumber++;
st+="Date Opened :"+dateOpened+"\n";
st+="Balance :$"+balance+"\n";
}

return st;
}

}
______________________________

// Test.java

public class Test {

   public static void main(String[] args) {
BankAccount ba=new BankAccount(50000,5);
ba.addHolder(new Person("Kane Williams",24));
ba.addHolder(new Person("James",25));
System.out.println(ba);
  

   }

}

________________________________

Output:

Name :Kane Williams Age :24
Account Number :1111
Date Opened :Sun May 26 01:56:15 IST 2019
Balance :$50000.0
Name :James Age :25
Account Number :1112
Date Opened :Sun May 26 01:56:15 IST 2019
Balance :$50000.0

______________________________Thank You