Java
/
I/O
- 1 Basics 9
-
Classes S
-
Objects S
-
Arrays S
-
Variables S
-
Loops S
-
Numbers S
-
Strings S
-
Exceptions S
-
Regexp S
- 2 OOP 9
-
Inheritance
-
Polymorphism
-
Static S
-
Abstract
-
Interfaces
-
Constructors S
-
Packages
-
Nested Classes
-
Final
- 3 Compiler 2
-
Sublime Text S
-
Apache Ant
- 4 Collections 8
-
Lists
-
Comparable S
-
Sets
-
Maps
-
Generics
-
Properties
-
Streams
-
Json
- 5 Threads 4
-
Create Thread S
-
Sleep
-
Lock
-
Scheduler
- 6 Design Patterns 4
-
Singleton
-
Observer
-
Strategy
-
Mediator
- 7 Swing 12
-
Frame
-
Panel
-
Listener
-
Combo Box
-
Label
-
Image
-
Menu
-
Table
-
Layout
-
Drawing
-
Timer
-
Designer
- 8 I/O 7
-
Streams IO
-
Socket
-
Watching Files
-
Mail
-
Logger
-
Clipboard
-
Encrypt S
- 9 Effective 7
-
Constructors S
-
Dependency Injection
-
Composition
-
Interfaces Default
-
Import Static S
-
Enums
-
Lambdas
- 10 Junit 5
-
About Junit S
-
Test Case
-
Suite Test
-
Annotations
-
Exceptions
- 11 Lambdas 7
-
Expressions S
-
Functional Interfaces
-
Streams
-
Common Operations
-
Default Methods
-
Static Methods S
-
Single Responsibility
- 12 JavaFX 6
-
Openjfx
-
Scene Builder
-
First App
-
Jar Archive
-
On Action
-
Change Listener
- 13 Maven 4
-
Demo
-
Spring Boot
-
Junit
-
Guava
- 14 Spring Boot 13
-
Quick start S
-
Rest service S
-
Consuming rest S
-
Templates S
-
Security auth S
-
Command line S
-
Scheduled task S
-
Ajax S
-
Jdbc mysql S
-
Encrypt password S
-
Https S
-
Jwt S
-
Post request S
R
Q
Server
p475 To make a Socket connection, you need to know the IP and the port. Start the server and wait for clients requests.
copy
package messages;
import java.io.*;
import java.net.*;
public class TestServer{
public static void main(String[] args) {
try {
ServerSocket serverSocket = new ServerSocket(4242);
System.out.println("Server started ...");
while(true) {
Socket socket = serverSocket.accept();
PrintWriter writer =
new PrintWriter(socket.getOutputStream());
writer.println("Hello Client!"); // write message to client
writer.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
Client
p478 Make a connection and read from server.
copy
package messages;
import java.io.*;
import java.net.*;
public class TestingApp{
public static void main(String[] args) {
System.out.println("Client started");
try {
// make a connection to the server
Socket socket = new Socket("127.0.0.1", 4242);
// ask the socket for an input stream
InputStreamReader streamReader =
new InputStreamReader(socket.getInputStream());
// read
BufferedReader reader =
new BufferedReader(streamReader);
String message = reader.readLine();
System.out.println("The server message is: " + message);
reader.close();
} catch(IOException e) {
e.printStackTrace();
}
}
}
➥ Questions