java-socket-networking

Java socket networking exercises including Daytime servers, concurrency models, and port scanning.

Java Socket Networking Experiments

Overview

This project contains a collection of Java networking exercises exploring socket programming and concurrency models. It demonstrates client-server communication, multiple server architectures, and basic network scanning.

Developed as part of coursework focused on understanding TCP/IP communication and concurrent server design.

Components

DayTimeClient

Connects to a Daytime Protocol server and retrieves the current time.

DayTimeServer

Basic single-threaded server responding with the current date/time.

MultiDayTimeServer

Sequential server variant introducing simulated delay.

FinalMultithreadedDayTimeServer

Thread-per-client implementation allowing multiple simultaneous connections.

PooledDaytimeServer

Uses a fixed thread pool via ExecutorService to handle client requests efficiently.

LowPortScanner

Scans low-numbered ports on a host to detect active services.

Concepts Demonstrated

• TCP socket communication
• Client-server architecture
• Thread-per-connection design
• Thread pooling
• Java concurrency utilities
• Network service discovery

How to Run

Compile:

javac -d out src/ie/atu/sw/*.java

Run examples:

java -cp out ie.atu.sw.DayTimeServer
java -cp out ie.atu.sw.DayTimeClient
java -cp out ie.atu.sw.LowPortScanner

Author

Eoghan Fallon

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Part of my software development learning portfolio.