├── .gitignore
├── .idea
├── .gitignore
├── dbnavigator.xml
├── misc.xml
├── modules.xml
└── vcs.xml
├── atm-java-implementation.iml
└── src
└── Main.java
/.gitignore:
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1 | ### IntelliJ IDEA ###
2 | out/
3 | !**/src/main/**/out/
4 | !**/src/test/**/out/
5 |
6 | ### Eclipse ###
7 | .apt_generated
8 | .classpath
9 | .factorypath
10 | .project
11 | .settings
12 | .springBeans
13 | .sts4-cache
14 | bin/
15 | !**/src/main/**/bin/
16 | !**/src/test/**/bin/
17 |
18 | ### NetBeans ###
19 | /nbproject/private/
20 | /nbbuild/
21 | /dist/
22 | /nbdist/
23 | /.nb-gradle/
24 |
25 | ### VS Code ###
26 | .vscode/
27 |
28 | ### Mac OS ###
29 | .DS_Store
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/.idea/.gitignore:
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1 | # Default ignored files
2 | /shelf/
3 | /workspace.xml
4 |
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/.idea/dbnavigator.xml:
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/.idea/misc.xml:
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/.idea/modules.xml:
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/.idea/vcs.xml:
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/atm-java-implementation.iml:
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/src/Main.java:
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1 | import java.util.Scanner;
2 |
3 | import static java.lang.System.exit;
4 |
5 | class ATM
6 | {
7 | private int accountBalance;
8 |
9 | public int getAccountBalance() {
10 | return accountBalance;
11 | }
12 |
13 | public void addMoney(int amountToBeDeposited)
14 | {
15 | accountBalance += amountToBeDeposited;
16 | }
17 |
18 | public void takeMoney(int amountToBeWithDrawn)
19 | {
20 | accountBalance -= amountToBeWithDrawn;
21 | }
22 | }
23 |
24 | class IndianBankATM extends ATM{
25 |
26 | public void initialize () throws InvalidAmountException, InsufficientBalanceException {
27 | Scanner scanner = new Scanner(System.in);
28 |
29 | int userChoice, inputAmount;
30 |
31 | do{
32 | System.out.println("________________________________");
33 | System.out.println("1 - Deposit Amount");
34 | System.out.println("2 - Withdraw Amount");
35 | System.out.println("3 - Check Balance");
36 | System.out.println("4 - Exit");
37 | System.out.println("________________________________");
38 | System.out.print("Enter your preferred option ... ");
39 |
40 | userChoice = Integer.parseInt(scanner.nextLine());
41 |
42 | switch (userChoice)
43 | {
44 | case 1 -> {
45 | System.out.print("Enter the amount to be deposited ... Rs.");
46 | inputAmount = Integer.parseInt(scanner.nextLine());
47 | if (isValidAmount(inputAmount))
48 | {
49 | depositAmount(inputAmount);
50 | }
51 | }
52 |
53 | case 2 -> {
54 | System.out.print("Enter the amount to be withdrawn ... Rs.");
55 | inputAmount = Integer.parseInt(scanner.nextLine());
56 | if (isValidAmount(inputAmount))
57 | {
58 | if (getAccountBalance() < inputAmount)
59 | {
60 | throw new InsufficientBalanceException("Insufficient account balance.");
61 | }
62 | withDrawAmount(inputAmount);
63 | }
64 | }
65 |
66 | case 3 -> {
67 | checkBalance();
68 | }
69 |
70 | case 4 -> {
71 | System.out.println("Thank you, Have a nice day :)");
72 | exit(0);
73 | }
74 |
75 | default -> {
76 | System.out.println("________________________________");
77 | System.out.println("Invalid option, please retry with a valid option");
78 | }
79 | }
80 | }while (true);
81 | }
82 |
83 | private boolean isValidAmount(int inputAmount) throws InvalidAmountException {
84 | if (inputAmount >0)
85 | {
86 | return true;
87 | }
88 | throw new InvalidAmountException("Amount must be greater than 0.");
89 | }
90 | private void depositAmount(int inputAmount) {
91 | addMoney(inputAmount);
92 | checkBalance();
93 | }
94 |
95 | private void withDrawAmount(int inputAmount) {
96 | takeMoney(inputAmount);
97 | checkBalance();
98 | }
99 |
100 | private void checkBalance() {
101 | System.out.println("________________________________");
102 | System.out.println("Your balance is Rs. " + getAccountBalance());
103 | }
104 | }
105 |
106 | public class Main {
107 | public static void main(String[] args) throws InvalidAmountException, InsufficientBalanceException {
108 | IndianBankATM guindyATM = new IndianBankATM();
109 | guindyATM.initialize();
110 | }
111 | }
112 |
113 | class InvalidAmountException extends Exception{
114 | public InvalidAmountException(String message) {
115 | super(message);
116 | }
117 | }
118 |
119 | class InsufficientBalanceException extends Exception{
120 | public InsufficientBalanceException(String message) {
121 | super(message);
122 | }
123 | }
124 |
125 |
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