JAVA PROGRAM • LEVEL 18 — PLACEMENT PROGRAMS & MINI PROJECTS
Build a Bank Account Model in Java
Learn build a bank account model in java with a complete, compiler-ready Java 17 example.
PROBLEM UNDERSTANDING
Input and expected output
No input required
true CB101 4500.0
COMPLETE JAVA 17 PROGRAM
Complete Java 17 implementation
class Account{private final String number;private double balance;Account(String number,double balance){this.number=number;this.balance=balance;}void deposit(double amount){if(amount>0)balance+=amount;}boolean withdraw(double amount){if(amount<=0||amount>balance)return false;balance-=amount;return true;}public String toString(){return number+" "+balance;}}class Main{public static void main(String[] args){Account account=new Account("CB101",5000);account.deposit(1000);System.out.println(account.withdraw(1500));System.out.println(account);}}CURRENT STEP
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SELECTED LINE
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EXPECTED OUTPUT FOR THE SAMPLE
true CB101 4500.0
PROGRAM EXPLANATION
Algorithm and explanation
- Initialize the deterministic sample values used for build a bank account model in java.
- Create the required object and apply Encapsulation and Validation to its state or behavior.
- Print the final result and compare it with the documented sample output.
This Java 17 example demonstrates Encapsulation, Validation, and State through a complete, executable program. The values are intentionally small so students can trace each statement, verify the output, and then modify the example safely in the online compiler.
EFFICIENCY
Time and space complexity
O(1)
O(1)
DEBUGGING CHECKLIST
Common mistakes
Keep the class name Main and the entry method signature public static void main(String[] args) when using the online compiler.
Create an object before accessing instance members; static members can be accessed through the class name.
Java is case-sensitive, and every statement that requires a semicolon must end with one.