This repository chronicles my 100-day journey mastering Java programming from absolute basics to advanced concepts. Every line of code represents dedication, growth, and the pursuit of becoming a skilled Software Development Engineer.
📋 Table of Contents
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Project | Description | Concepts |
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🎲 Quiz Game | Interactive console application | Control Flow, Collections |
📊 Grade Manager | Student management system | OOP, File I/O |
🧮 Calculator | Mathematical operations | Methods, Exception Handling |
🏦 Bank Simulator | Real-world application | Advanced OOP, Design Patterns |
🔥 Click to explore all 50+ concepts mastered
journey
title Java Learning Journey
section Fundamentals
Hello World : 5: Day 1
Variables : 4: Day 5
Control Flow : 3: Day 10
Arrays : 4: Day 15
section OOP
Classes : 5: Day 25
Inheritance : 4: Day 35
Polymorphism : 5: Day 45
section Advanced
Exceptions : 4: Day 65
Generics : 5: Day 80
Lambda : 5: Day 95
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🔍 Click to explore the complete folder structure
📦 Java-Programs
├── 📁 01_Basic/ ← 🌟 Start Here!
│ └── 🧪 Practice-Set/
├── 📁 02_DataTypes/ ← 🎯 Primitives & Objects
├── 📁 03_Variables/ ← 🔄 Scope & Lifecycle
├── 📁 04_OperatorsAndExpressions/ ← ➕ Mathematical Operations
│ └── 🧠 PracticeProblem/
├── 📁 05_ControlStatement/ ← 🎮 Logic & Flow Control
│ └── 🎲 QuizGame/ ← Mini Project!
├── 📁 06_Methods/ ← 🔧 Reusable Code
│ └── 📊 Practice_Project/ ← Grade Manager
├── 📁 07_ArrayAndString/ ← 📝 Data Structures
├── 📁 08_OOPs/ ← 🏗️ Object-Oriented Basics
│ ├── 🧱 Abstraction/
│ ├── 🛡️ Encapsulation/
│ └── 🚗 Inheritance/
├── 📁 09_ArrayAndString/ ← 📋 Advanced Collections
│ └── 📋 ArrayList/
├── 📁 10_String/ ← 🧵 Text Processing
├── 📁 11_OOPs/ ← 🧬 Advanced OOP
│ ├── 👨👩👧 inheritance/
│ ├── 🧠 OOPs1/
│ ├── 🧬 OOPs2/
│ └── 🧪 OOPs3/
├── 📁 Exception_Handling/ ← ⚠️ Error Management
├── 📁 LambdaExpression/ ← 🔗 Functional Programming
├── 📁 OOPs/Generics/ ← 🧬 Type Safety
└── 📁 SelfQuestions/ ← 🧠 Challenge Yourself!
└── 🧪 01_BasicQuestions/
git clone https://github.com/Piyush64-bit/Java-Programs.git
cd Java-Programs |
cd 01_Basic
javac HelloWorld.java |
java HelloWorld |
💡 Pro Tips & Advanced Commands
Single File Programs:
javac FileName.java && java FileName
Package-based Programs:
# Compile from root directory
javac -d . package/path/ClassName.java
# Run with full package name
java package.path.ClassName
Multiple Classes:
# Compile all files in directory
javac *.java
# Run the main class
java MainClassName
# Quick compilation for current directory
find . -name "*.java" -exec javac {} +
# Run with custom classpath
java -cp . com.example.MainClass
# Debug mode
java -Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=n,address=5005 MainClass
"What's a variable?"
Starting from scratch |
"I understand OOP!"
Concepts clicking |
"Lambda expressions!"
Advanced features |
"I'm a Java developer!"
Mission accomplished |
🧠 Technical Skills:
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🎯 Soft Skills:
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🎯 Milestone | 📅 Day | 💭 Reflection |
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✅ First "Hello World" | Day 1 | The beginning of everything |
✅ First working loop | Day 8 | Understanding iteration |
✅ First custom class | Day 25 | OOP breakthrough moment |
✅ First inheritance | Day 35 | Code reusability unlocked |
✅ Exception handling | Day 55 | Writing robust code |
✅ Lambda expressions | Day 85 | Modern Java mastery |
✅ 100th program | Day 100 | Mission Accomplished! |
Programs Written & Tested |
Concepts Mastered |
Days Dedicated Learning |
Lines Of Code |
Projects Completed |
🌟 Standout Programs & Projects
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Having mastered the fundamentals, it's time to dive into enterprise-level Java development! The journey doesn't stop here—it evolves. What's Next:
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🚀 Explore Advanced Concepts:
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📚 Core Java (✅ COMPLETED)
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🌐 Advanced Java (🚀 IN PROGRESS)
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☁️ Full Stack Development (🔜 COMING SOON)
Starting their Java journey from scratch
Zero to Hero path |
Reviewing and strengthening core concepts
Skill reinforcement |
Preparing for interviews or exams
Academic excellence |
Who prefer learning by example
Hands-on approach |
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