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Socket (TCP & UDP) communication in Java

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();   ...
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Second Largest number in the Array

 



import java.util.Scanner; public class SecondLargestInArray { public static void main(String[] args) { Scanner scanner = new Scanner(System.in); System.out.print("Enter the size of the array: "); int size = scanner.nextInt(); int[] arr = new int[size]; System.out.println("Enter the elements of the array:"); for (int i = 0; i < size; i++) { arr[i] = scanner.nextInt(); } int largest = arr[0]; int secondLargest = Integer.MIN_VALUE; for (int i = 1; i < size; i++) { if (arr[i] > largest) { secondLargest = largest; largest = arr[i]; } else if (arr[i] > secondLargest && arr[i] != largest) { secondLargest = arr[i]; } } if (secondLargest == Integer.MIN_VALUE) { System.out.println("There is no second largest element."); } else { System.out.println("The second largest element in the array is: " + secondLargest); } scanner.close(); } }
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