Basic Java Programs

📌 Overview

This repository contains a wide collection of basic Java programs, organized by topics/packages.
It is designed to help beginners understand core Java concepts, improve problem-solving skills, and practice coding.

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📂 Project Structure with Key Logics

🔹 Operators

• ArithmeticOperators – Perform + , - , * , / , %.
• AssignmentOperators – Example: a += b means a = a + b.
• LogicalOperators – Use && (AND), || (OR), ! (NOT).
• RelationalOperators – Example: a > b, a == b.
• TernaryOperator – Syntax: condition ? value1 : value2.
• UnaryOperators – Example: ++a , a++ , --a , -a.

🔹 Patterns

• Example1 – Example7

🔹 Array

• AddElement
• Check_array
• Maxnum
• Practice
• RemoveElement
• Reverse
• RotateAnticlock
• RotateClockwise

🔹 IfElse

• Marks → marks >= 35 → Pass else Fail

🔹 Loops

• DoWhile
• ForLoop
• WhileLoop

🔹 Numbers

• Armstrong → sum(d^n) == num (153 = 1³+5³+3³)
• DigitsCount → while(n>0) n/10
• Emirp → Prime and reverse is also prime
• Factor → Numbers that divide n exactly
• HappyNumber → Replace number by sum of squares of digits until 1
• Hcf → Greatest number dividing both a & b
• KrishnaMurthyNumber → sum(fact(digits)) == num
• Lcm → Smallest number divisible by both a & b
• Palindrome → reverse == original
• Perfect → sum(factors) == num
• PositiveInteger → n > 0
• Prime → Divisible only by 1 and itself
• PrimeMethod
• SpyNumber → sum(digits) == product(digits)

🔹 Strings

• ASCII
• Anagram → Same characters in any order
• ConvertArray
• First
• Problem1 – Problem6
• ReverseSubstring
• Substring
• VowConso → Count vowels & consonants
• palindrome → reverse == original

🔹 Recursion

• ArmstrongRec
• Factorial → n! = n × (n-1)!
• ReverseRecur
• Test

🔹 SearchingTechniques

• BinarySearch → Divide & search mid element
• LinearSearch → Check one by one

🔹 SortingTechniques

• BubbleSort → Swap adjacent elements until sorted

🔹 Switch

• Days

🔹 TwoDArray

• Practice

Project Structure

├── .settings/
├── bin/
├── src/
│ ├── Array/
│ ├── IfElse/
│ ├── Loops/
│ ├── Numbers/
│ ├── Operators/
│ ├── Patterns/
│ ├── Recursion/
│ ├── SearchingTechniques/
│ ├── SortingTechniques/
│ ├── Strings/
│ ├── Switch/
│ ├── TwoDArray/
│ └── module-info.java
├── .classpath
└── .project

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