Java schedule sample

Core Java 24-Day Learning Schedule

1 Hour Per Day | Goal: Basics to OOP, Exceptions, File Handling + 3 Mini Projects

WEEK 1: Basics + Syntax | "Make the computer do things"

Day	Topic	What You Learn	10 Min Code Task
Day 1	Setup + First Program	JDK, JRE, JVM, main, System.out.println	Print name, age, city
Day 2	Variables + Data Types	int, double, char, boolean, String, final	Calculator: input 2 numbers, print sum
Day 3	Operators	Arithmetic, Relational, Logical, Ternary, ++ --	Swap 2 numbers without 3rd variable
Day 4	Input + Output	Scanner class. nextInt, nextLine	Cashbill input: item name, qty, price
Day 5	Decision Making	if-else, nested if, switch-case	Grade system: 90=A, 75=B
Day 6	Loops	for, while, do-while, break, continue	Print multiplication table 1-10
Day 7	Mini Project 1	Combine Days 1-6	ATM Menu: Deposit, Withdraw, Check Balance

WEEK 2: Arrays + Strings + Methods | "Organize data"

Day	Topic	What You Learn	10 Min Code Task
Day 8	Arrays 1D	Declaration, init, loop, length	Find max/min in array of 5 marks
Day 9	Arrays 2D	Matrix, row/col traversal	Print 3x3 matrix + sum of diagonals
Day 10	Methods	method(), parameters, return, void	Method isPrime(n)
Day 11	Method Overloading	Same name, different parameters	add(int,int) and add(double,double)
Day 12	Strings	String vs StringBuffer, length, charAt, substring	Palindrome checker
Day 13	String Methods	split, trim, toUpperCase	Count words in a sentence
Day 14	Mini Project 2	Arrays + Methods	Cash Bill Program - Array of items, formatted 50 chars

WEEK 3: OOP + Core Concepts | "Think like an object"

Day	Topic	What You Learn	10 Min Code Task
Day 15	OOP Basics	Class, Object, new, constructor, this	class Student with name, roll
Day 16	Constructors + static	Default, param. static variable/method	BankAccount with static bankName
Day 17	Encapsulation	private, getters/setters	Make Student fields private
Day 18	Inheritance	extends, super	Person → Employee
Day 19	Polymorphism	Method overriding, dynamic dispatch	shape.area() in Circle, Square
Day 20	Abstract + Interface	abstract class, interface	interface Payable
Day 21	Mini Project 3	OOP	Law Firm Client System - Array of Client objects

WEEK 4: Exceptions + Collections + File + Interview Prep

Day	Topic	What You Learn	10 Min Code Task
Day 22	Exception Handling	try-catch-finally, throw, custom exception	Handle ArithmeticException
Day 23	File + Collections	FileWriter, ArrayList, HashMap	Save bill to bill.txt
Day 24	Final Project + Revision	Revise all. Debugging tips	Final Project: Cashbill + OOP + File + Exception

Rules to Follow for 1 Hour

1. First 10 min: Revise yesterday. Write 3 questions from yesterday.
2. Next 40 min: New concept. Type every example. Don't copy-paste.
3. Last 10 min: Do the "10 Min Code Task". Debug with System.out.println

Tools Needed

• Software: JDK 17 + VS Code / IntelliJ Community / Eclipse
• Practice: After Day 14, use VS Code terminal. No IDE auto-complete.

Interview Topics Covered

JVM vs JRE vs JDK, == vs equals, Overloading vs Overriding, ArrayList vs Array, try-catch, static, final, abstract vs interface

Progress Tracker

Tick each day after completion:

Day 01 [ ]Day 02 [ ]Day 03 [ ]Day 04 [ ]Day 05 [ ]Day 06 [ ]
Day 07 [ ]Day 08 [ ]Day 09 [ ]Day 10 [ ]Day 11 [ ]Day 12 [ ]
Day 13 [ ]Day 14 [ ]Day 15 [ ]Day 16 [ ]Day 17 [ ]Day 18 [ ]
Day 19 [ ]Day 20 [ ]Day 21 [ ]Day 22 [ ]Day 23 [ ]Day 24 [ ]