1. Introductory lesson. Commands and the first program in Java.
About java advantages, applications
About JavaRush academy and JavaRush
The structure of the program, method main
sout
Compiling the class into byte code from the console, running the program
About WebIDE
2. Introduction to types and keyboard input. Learning IDEA.
Saving text into a variable, outputting it into the console
Declaring and initializing String variables
Comments in the code
Variables of the int type
Elementary mathematical operations with variables of int type
Increment, Decrement
Concatenation
Integer.parseInt(), String.valueOf()
Storing primitive variables in memory
Storing String variables in memory
byte, short, char, long, float, double, boolean
Scanner methods
Installing IDEA, downloading the project, downloading the JDK
How to install the plugin, how it works
D.Z. of the Idea
3. Conditional statements.
If, if-else, if-else-if
Command blocks
Nested command blocks (nested ifs).
Method overloading, constructor call peculiarity.
Comparative operators, including double.
Boolean AND, OR, NOT
Ternary operator
Introduction to streams: Reader/Writer, FileReader/FileWriter
Comparing Primitives and String
D.Z.
4. Cycles.
A problematic example of the task of doing something many times.
while
break, continue
for
do-while
A comparison of different loops, figuring out which is better to use.
D.Z.
5. Arrays.
Creating and filling arrays.
Traversing an array
Storing arrays in memory
Two-dimensional Arrays
Notched Arrays
n-dimensional arrays
Utility class Arrays
6. Functions.
Declaring and calling methods
Parameters
Return value, void
Access modifiers
Local variables of the method
Method modifiers, method main
Constants
Hiding of variables (shadowing)
7. Working with strings. Optional (StringBuilder, String.format, encodings, character escaping...)
Literals
Encodings
Character escaping.
Basic String class methods
Auxiliary classes for working with strings
8. Data types. Introduction to OOP.
Primitive types
Introducing data types
Reference types
Objects
null
Introduction to OOP
Inheritance
9. Objects.
Object creation (new)
Constructor, default constructor
Constructor with parameters
Order of constructor calls in inheritance
Access to the fields of an object (getter, setter)
The life cycle of the object
hashCode, equals
10. Classes and static.
Load a class
Static variables
Comparing static and non-static variables
Static methods
Initialization order when using constructors and static blocks
Internal classes
11. Lists and Generics.
Wrapper classes
ArrayList
Array VS ArrayList
Static methods
ArrayList typing (generics)
12. Collections.
Hierarchy of collections
LinkedList
ArrayList VS LinkedList
Set, HashSet
Queue
Map, HashMap, TreeMap
Which collections are best to use
iterator, for-each
Collections
13. Singleton, Enum, switch.
What are enumerations for?
Enum announcements
Enum is the best singleton
switch
14. Exceptions.
Normal code execution and runtime errors
try-catch
Exception hierarchy
multicatch
finally
throw
throws
Creating your own exceptions
stack trace
try with resources
AutoCloseable
15. Input/Output streams.
InputStream
Reader
BufferedReader
OutputStream
Writer
BufferedWriter
16. Input/Output Streams 2. Pattern Chain of responsibility.
ByteArrayInputStream
RByteArrayOutputStream
Combining streams
17. I/O streams 3. java.nio.
io VS nio
FileChannel .
Selector
Path
Paths
Files
18. Working with time and date.
Date
DateFormat
Calendar
LocalDate, LocalTime, LocalDateTime
Instant
ZonedDateTime
DateTimeFormatter
19. Git. Final project.
Making a crypto-analyzer