Advance Java tutorials with code examples in details
Here is an Advanced Java tutorial with detailed code examples. This tutorial covers advanced topics like Multithreading, File I/O, Networking, Java Collections, Lambda Expressions, Streams, Reflection, and more.
1. Multithreading in Java
Multithreading allows multiple threads to run concurrently, which is essential for performance, especially in multi-core processors.
1.1 Creating a Thread in Java
There are two ways to create a thread in Java:
- By extending the
Thread
class - By implementing the
Runnable
interface
Example 1: Extending Thread Class
Example 2: Implementing Runnable Interface
1.2 Thread Synchronization
When multiple threads access shared resources, synchronization is important to prevent data corruption. This can be done using the synchronized
keyword.
Example 3: Synchronizing a Method
In this example, the increment
method is synchronized to ensure only one thread can access it at a time.
2. File I/O in Java
Java provides a rich set of classes in the java.io and java.nio packages to handle file input/output.
2.1 Reading a File
Using FileReader and BufferedReader
This code reads each line of a text file and prints it to the console.
2.2 Writing to a File
Using FileWriter and BufferedWriter
This code writes two lines to the "output.txt" file.
3. Java Networking
Java provides a java.net
package that supports network communication.
3.1 Socket Programming
You can create client-server communication using Sockets in Java. The client sends a message to the server, and the server responds.
Server Program
Client Program
4. Java Collections Framework
The Java Collections Framework provides a set of classes and interfaces to store and manipulate data.
4.1 ArrayList Example
ArrayList
is a resizable array implementation of the List
interface.
4.2 HashMap Example
HashMap
is a key-value pair implementation of the Map
interface.
5. Lambda Expressions and Streams in Java
Java 8 introduced Lambda Expressions and Streams for functional-style programming.
5.1 Lambda Expressions
Lambda expressions provide a clear and concise way to represent one method interface (functional interface) using an expression.
5.2 Streams API
The Stream
API is used to process sequences of elements in a functional style. It allows operations like filtering, mapping, and collecting.
6. Reflection in Java
Reflection is a powerful feature in Java that allows you to inspect and manipulate classes, methods, fields, and constructors during runtime.
6.1 Using Reflection to Inspect Class
7. Java Design Patterns
Design Patterns are reusable solutions to common software design problems. Some common patterns in Java include:
- Singleton
- Factory
- Observer
- Decorator
- Strategy
Conclusion
This Advanced Java tutorial covered several advanced topics in Java such as Multithreading, File I/O, Networking, Java Collections, Lambda Expressions, Streams, and Reflection. These concepts help you write efficient, scalable, and maintainable code. To truly master Java, it's important to keep practicing and exploring advanced concepts like Java Memory Management, Concurrency, JVM Internals, and Distributed Systems.
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