From Python to Java

Program Structure and Execution

Programs and Their Execution

Running a Program

Example: Hello World!

Lexical Structure

Syntactical Structure

Program Comments

Data Types and Expressions

Primitive Types and Reference Types

Numeric Data Types

Strings and Characters

String Concatenation

Type Conversions

Arithmetic and Math Functions

Comparisons

Boolean Values and Logical Operators

Method Calls

Simple Statements

Import Statements

Variable Declarations and Typing

Assignment Statements

break, return, and Empty Statements

Terminal Input and Output

Terminal Output

Terminal Input

Control Statements

while Loops

for Loops

if Statements

Objects and Interfaces

Object Instantiation

Assignment, Parameters, and Casting

Interfaces

Collections

Strings

Arrays

Lists

Sets

Dictionaries or Maps

Iterators

Defining Classes

Class Structure

Visibility Modifiers

Instance Variables and Constructors

Defining Other Constructors

Instance Methods

Method Overloading

Class (static) Variables and Methods

Symbolic Constants (Final Variables)

Defining a String Representation

Defining Equality

Defining Comparisons

Defining Interfaces

Inner Classes

Defining an Iterator

Inheritance

Defining Subclasses

Abstract Classes and Methods