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Overview of Java Language 1 Tokens in Java 2 Escape sequences in Java 3 Character Set in Java 4 Benefits of OOP 5 Basic Structure of Java Program 6 Simple Program of Java- Hello World! 7 Programming pattern 8 Path Setting 9 Installing and Configuring 10 Download Java Development Kit -JDK 11 JRE - Java Runtime Environment 12 JDK - Java Development Kit 13 JVM - Java Virtual Machine 14 Compilation and Execution Process 15 Keywords in Programming Language 16 Important Books for Java

DataTypes in java 1 Introduction to Data type Java 2 char - Data Type in Java 3 Unicode System in Java 4 boolean - Data Type in Java 5 byte - Data Type in Java 6 short - Data Type in Java 7 int - Data Type in Java 8 long - Data Type in Java 9 float - Data Type in Java 10 double - Data Type in Java 11 Data Type Conversion or Casting in Java

Variables in java 1 Variable - in Java 2 Variable initialization and Declaration - in Java 3 Variable Types and Scope- in Java

Constants in java 1 Constants in Java

Operators in java 1 Operators in Java 2 Arithmetic Operators in Java 3 Assignment Operators Java 4 Relational Operators 5 Conditional (Ternary) Operator in Java 6 Logical Operators in Java 7 Expression Evaluation in Java 8 Bitwise Operators 9 Operator precedence in Java 10 Shift Operators 11 instanceof operator in Java

Decision Making in java 1 Control flow in programming 2 Decision Making in Java Introduction 3 if statement in Java 4 if else Statement in Java 5 Nested if Statement in Java 6 if else if ladder in Java 7 switch case in Java 8 Three Constructs That Govern Statement Flow

Looping in java 1 Loop Introduction in Java Language 2 While Loop in Java Language 3 Do While Loop in Java Language 4 Jump statements in Java 5 Nested Loops in Java Language 6 Labeled For Loop in Java Language 7 For each loop in Java Language 8 For Loop in Java Language 9 Empty Loop in Java

String in java 1 Introduction in String Java 2 Immutable Strings and Interned Strings in Java 3 String comparision in Java 4 Sub String in Java 5 StringBuffer in Java 6 StringBuilder in Java

Array in java 1 Array in java 2 Array Introduction in Data Structure 3 Need for Array 4 Insert an Element in the Middle of an Array 5 Delete an Element in the Middle of an Array 6 2D and Multi-Dimension Array in Java

Sorting 1 Bubble Sort Implementation in Java

Searching in Arrays (Java) 1 Introduction to Searching in Java 2 Linear Search Searching in Arrays (Java) 3 Binary Search in Arrays (Java) 4 Built-in Searching Methods in Java

Class, Object and Methods in java 1 Class and Object Concept in Java 2 Concept of Methods related to object 3 Methods Overloading Java 4 Constructor in Java 5 Constructor overloading 6 Methods Examples Java 7 this Keyword in Java 8 static Keyword in Java 9 Covariant return types 10 finalize() method in java 11 Recursion in Java 12 Pure Method in Java 13 Impure Method in Java 14 In Java, Object is the superclass of all other classes

Inheritance in java 1 Inheritance in Java (IS-A) 2 Aggregation in Java (HAS-A) 3 super keyword in Java 4 Instance initializer block 5 static block in Java 6 final keyword 7 Garbage Collection in Java

OOPs concept Java 1 Wrapper Class in Java 2 Nested Class In Java 3 Command Line Argument 4 Student Management System (Basic Version)

Interface in java 1 Introduction to Interface 2 Interface and Inheritance in Java 3 Abstract vs Interface

Managing Errors and Exception 1 Introduction to Exception Handling - Java 2 try and catch 3 Multiple catch block in java 4 Nested try block in java

Number Class in java 1 Number Class Introduction 2 Mathematical Library Methods in Java 3 decrementExact() method 4 cosh() method 5 copySign() method 6 cbrt(double a) method 7 addExact(long x, long y) method 8 addExact(int x, int y) method 9 random() Method 10 toRadians() Method 11 toDegrees() Method 12 atan2() Method 13 getExponent(double d) method 14 hypot(double x, double y) method 15 toIntExact() method 16 tanh() method 17 sinh() method 18 nextDown() method 19 nextUp() method 20 nextAfter() method 21 negateExact() method 22 multiplyExact() method 23 incrementExact() method 24 IEEEremainder(double f1,double f2) method 25 atan() Method 26 acos() Method 27 rint() Method 28 floor() Method 29 ceil() Method 30 abs() method 31 parseInt() method 32 toString() Method 33 valueOf() method 34 equals() method 35 compareTo() method 36 xxxValue () Method in Java 37 round() Method in 38 min() Method 39 asin() Method 40 tan() Method 41 cos() Method 42 sin() Method 43 sqrt() Method 44 pow() Method 45 log10() method 46 log() Method 47 exp() Method 48 max() Method

Java Library Classes and Packages 1 Java Library Classes and Packages

Character Class in java 1 Introduction to Character Class 2 isLetter() 3 isDigit() 4 isWhitespace() 5 isUpperCase() 6 isLowerCase() 7 toUpperCase() 8 toLowerCase() 9 toString()

StringBuffer Class Methods 1 trim() method 2 length() Method 3 capacity() Method 4 ensureCapacity() Method 5 setLength() Method 6 charAt() Method 7 setCharAt() Method 8 getChars() Method 9 append() Method 10 insert() Method 11 reverse() Method

Project 1: Question and Solution 1 Project Question: Electricity Bill Calculator 2 Project Solution: Electricity Bill Calculator

Project 2: Question and Solution 1 Project Question: Hotel Booking System 2 Project Solution: Hotel Booking System

Vector in Java 1 Vector Introduction

Polymorphism in Java 1 Polymorphism in Java

Abstarct class and Methods in java 1 Abstract class and method

Packages in java 1 Package Introduction in Java 2 Sub Package in Java 3 static import in Java 4 Access Modifiers in Java 5 Non Access Modifiers in Java 6 Encapsulation in Java 7 Access modifier Example 1 8 Access modifier Example 2 9 Access modifier Example 3 10 Access modifier Example 4

Multithreading in java 1 Introduction to Multithreading 2 Life Cycle of Thread 3 Create Thread

Applet Programming 1 Applet Introduction 2 Applet class and it's Skeleton 3 Graphics in Applet 4 Displaying Image in Applet

Java Networking 1 Java Networking

Computing and Ethics 1 Computing and Ethics

Java Programming Language MCQ 1 Java Language Fundamental 2 Java Language Basics 3 Java Interviews MCQs 4 History of Java 5 Java Data Types and Variables - MCQ 6 Literals in Java - MCQ 7 Java Input Output MCQ 8 Declaration and Access Control in Java 9 Operator in Java 10 Java Control Flow 11 Java Constructor and Methods 12 Array in Java 13 String in Java 14 Overriding and Overloading in Java 15 Inheritance in Java MCQ 16 Java Interfaces And Abstract Classes MCQ 17 Java thread MCQ 18 Java Exception MCQ

Example 1: ATM Simulation 1 Example 1: ATM Simulation

Project 3: Question and Solution 1 Project Question: Creating a Hollow Square with Diagonal Lines 2 Project Solution: Creating a Hollow Square with Diagonal Lines

Project 4: Question and Solution 1 Project Assignment: Creating an X Pattern 2 Project Solution: Generating an X Pattern in Java

Project 5: Question and Solution 1 Project Question: Hollow Square Pattern 2 Project Solution: Hollow Square Pattern

Project 6: Question and Solution 1 Project Assignment: How to Implement Binary Search 2 Project Solution: How to Implement Binary Search

Project 7: Question and Solution 1 Project Assignment: Determine the Best Performing Section in Final Exams 2 Project Solution: Determine the Best Performing Section in Final Exams 3 Project Bonus Task & Solution: Determine the Best Performing Section in Final Exams

Java Programming Language 1 Java History 2 Java Features 3 How Java Differs from C and C++ 4 Java and Internet 5 Java Characteristics: A Comprehensive Guide 6 Basic Concept of OOP 7 TCS Core Java Questions 8 All Difference in Java

Project 8: Question & Answer 1 Project Question: Number of boxes into cartons of capacities 2 Project Answer: Number of boxes into cartons of capacities

Project 9: Question & Answer 1 Project Question: Matrix: input, rotate 270° anticlockwise, sum odds, error if invalid. 2 Project Answer: Matrix: input, rotate 270° anticlockwise, sum odds, error if invalid.

Project 10: Question & Answer 1 Project Question: Check if a sentence has consecutive word lengths and ends with . or ?. 2 Project Answer: Check if a sentence has consecutive word lengths and ends with . or ?.

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Example 1: ATM Simulation

Rumman Ansari August 31, 2025 257 views

Problem Statement

Banks provide ATM machines where customers can perform transactions like check balance, deposit, withdraw money, and exit. Customers must enter the correct PIN to access their account. If a customer enters the wrong PIN more than 3 times, their account should be locked.

The system should repeatedly show a menu until the customer chooses to exit. The program must also check whether the withdrawal amount is greater than the available balance.

Control Flow Used:

while loop for PIN verification
if-else for PIN attempts and withdrawal check
switch for transaction menu
do-while loop for repeating the menu

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