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(); System.out.println("Client connected."); BufferedReader in = new Bu
To read character arrays and integer arrays in Java, you can use the `Scanner` class or the `BufferedReader` class. Here's how to do it using each approach:
1. Using Scanner class:
import java.util.Scanner;
public class Main {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
// Reading a character array
System.out.print("Enter a string: ");
String str = scanner.nextLine();
char[] charArray = str.toCharArray();
// Reading an integer array
System.out.print("Enter the size of the integer array: ");
int size = scanner.nextInt();
int[] intArray = new int[size];
System.out.println("Enter " + size + " integers separated by spaces:");
for (int i = 0; i < size; i++) {
intArray[i] = scanner.nextInt();
}
// Displaying the character array
System.out.print("Character array: ");
for (char ch : charArray) {
System.out.print(ch + " ");
}
System.out.println();
// Displaying the integer array
System.out.print("Integer array: ");
for (int num : intArray) {
System.out.print(num + " ");
}
scanner.close();
}
}
2. Using BufferedReader class:
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
public class Main {
public static void main(String[] args) {
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
try {
// Reading a character array
System.out.print("Enter a string: ");
String str = reader.readLine();
char[] charArray = str.toCharArray();
// Reading an integer array
System.out.print("Enter the size of the integer array: ");
int size = Integer.parseInt(reader.readLine());
int[] intArray = new int[size];
System.out.println("Enter " + size + " integers separated by spaces:");
String[] tokens = reader.readLine().split(" ");
for (int i = 0; i < size; i++) {
intArray[i] = Integer.parseInt(tokens[i]);
}
// Displaying the character array
System.out.print("Character array: ");
for (char ch : charArray) {
System.out.print(ch + " ");
}
System.out.println();
// Displaying the integer array
System.out.print("Integer array: ");
for (int num : intArray) {
System.out.print(num + " ");
}
reader.close();
} catch (IOException e) {
System.out.println("Error reading input: " + e.getMessage());
}
}
}
Both approaches allow you to read character arrays and integer arrays from the standard input and display them to the user. The Scanner class provides a simpler and more convenient way to read input, while the BufferedReader class offers more flexibility and control over input handling.
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