package java_problems_datastructures;
// problem: chapter 1 - 24;

// Change the printSummery method to non static and calling using it's object

public class CreditCard2 {
	// Instance variables:
	private String customer; // name of the customer (e.g., ”John Bowman”)
	private String bank; // name of the bank (e.g., ”California Savings”)
	private String account; // account identifier (e.g., ”5391 0375 9387 5309”)
	private int limit; // credit limit (measured in dollars)
	protected double balance; // current balance (measured in dollars)
	// Constructors:

	public CreditCard2(String cust, String bk, String acnt, int lim, double initialBal) {
		customer = cust;
		bank = bk;
		account = acnt;
		limit = lim;
		balance = initialBal;
	}

	public CreditCard2(String cust, String bk, String acnt, int lim) {
		this(cust, bk, acnt, lim, 0.0); // use a balance of zero as default
	}

	// Accessor methods:
	public String getCustomer() {
		return customer;
	}

	public String getBank() {
		return bank;
	}

	public String getAccount() {
		return account;
	}

	public int getLimit() {
		return limit;
	}

	public double getBalance() {
		return balance;
	}

	// Update methods:
	public boolean charge(double price) { // make a charge
		if (price + balance > limit) // if charge would surpass limit
			return false; // refuse the charge
		// at this point, the charge is successful
		balance += price; // update the balance
		return true; // announce the good news
	}

	public void makePayment(double amount) { // make a payment
		balance -= amount;
	}

	// Utility method to print a card's information
	// Change the method from static to non static
	public void printSummary(CreditCard2 card) {
		System.out.println("Customer = " + card.customer);
		System.out.println("Bank = " + card.bank);
		System.out.println("Account = " + card.account);
		System.out.println("Balance = " + card.balance); // implicit cast
		System.out.println("Limit = " + card.limit); // implicit cast
	}


	
    // Driver method
	public static void main(String[] args) {
		CreditCard2[] wallet = new CreditCard2[3];
		wallet[0] = new CreditCard2("John Bowman", "California Savings", "5391 0375 9387 5309", 5000);
		wallet[1] = new CreditCard2("John Bowman", "California Federal", "3485 0399 3395 1954", 3500);
		wallet[2] = new CreditCard2("John Bowman", "California Finance", "5391 0375 9387 5309", 2500, 300);

		
		
		for (int val = 1; val <= 16; val++) {
			 wallet[0].charge(3*val);
			 wallet[1].charge(3*val);
			 wallet[2].charge(val);
			 }
			
			 for (CreditCard2 card : wallet) {		 
			 // To call a non static method we have to call the method by creating object for that class.
			 card.printSummary(card);  	 
			 while (card.getBalance() > 200.0) {
			 card.makePayment(200);
			 System.out.println("New balance = " + card.getBalance());
			  }
			 System.out.println();
			 }
		
		
	}
}

Output:

Customer = John Bowman
Bank = California Savings
Account = 5391 0375 9387 5309
Balance = 408.0
Limit = 5000
New balance = 208.0
New balance = 8.0

Customer = John Bowman
Bank = California Federal
Account = 3485 0399 3395 1954
Balance = 408.0
Limit = 3500
New balance = 208.0
New balance = 8.0

Customer = John Bowman
Bank = California Finance
Account = 5391 0375 9387 5309
Balance = 436.0
Limit = 2500
New balance = 236.0
New balance = 36.0