Someone wanted to learn this too, so Grasp built them a personal learning path.
You can keep exploring this one or create a path like this one shaped around you.
Recommended resources
Module 1
Java Fundamentals and Setup
Module 2
Variables, Data Types, and Input
Module 3
Operators and Expressions
Module 4
Control Flow: Conditional Statements
Module 5
Control Flow: Loops
Module 6
Methods and Scope
Module 7
Working with Arrays
Module 8
Introduction to Object-Oriented Programming
Module 9
OOP Principles: Encapsulation and Statics
Module 10
OOP Principles: Inheritance and Polymorphism
Module 11
Exception Handling and Collections
Module 12