Socket communication in Java enables communication between two endpoints over a network. There are two main types of sockets: TCP sockets and UDP sockets. Let's explain both types with examples: TCP Socket Communication: 1. **Server Side**: - The server creates a `ServerSocket` object to listen for incoming connections on a specific port. - When a client connects, the server accepts the connection and creates a `Socket` object to communicate with the client. - The server reads from and writes to the socket's input and output streams to communicate with the client. import java.io.*; import java.net.*; public class TCPServer { public static void main(String[] args) throws IOException { ServerSocket serverSocket = new ServerSocket(12345); System.out.println("Server started. Waiting for client..."); Socket clientSocket = serverSocket.accept(); ...
Method Overloading in Java
Method Overloading is a feature in Java that allows a class to have multiple methods with the same name but different parameter lists. The methods can have a different number or types of parameters. The decision on which method to invoke is made by the compiler based on the arguments provided during the method call.
Example:
public class Calculator {
// Method to add two integers
public int add(int a, int b) {
return a + b;
}
// Method to add three integers
public int add(int a, int b, int c) {
return a + b + c;
}
// Method to add two doubles
public double add(double a, double b) {
return a + b;
}
// Method to concatenate two strings
public String concatenate(String str1, String str2) {
return str1 + str2;
}
}
Method Overloading in Action:
public class Main {
public static void main(String[] args) {
Calculator calculator = new Calculator();
// Overloaded methods for addition
int sum1 = calculator.add(5, 10);
int sum2 = calculator.add(2, 3, 5);
// Overloaded method for addition with doubles
double doubleSum = calculator.add(2.5, 3.7);
// Overloaded method for string concatenation
String result = calculator.concatenate("Hello, ", "World!");
// Displaying Results
System.out.println("Sum of two integers: " + sum1);
System.out.println("Sum of three integers: " + sum2);
System.out.println("Sum of two doubles: " + doubleSum);
System.out.println("Concatenated string: " + result);
}
}
In this example, the `Calculator` class demonstrates method overloading:
- Two methods for integer addition with different parameter counts.
- A method for double addition with a different parameter type.
- A method for string concatenation.
During the method calls in the `Main` class, the compiler determines the appropriate method to invoke based on the number and types of arguments passed. Method overloading enhances code readability and provides flexibility when dealing with different data types or varying numbers of parameters.
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