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MultiThreadServer.java
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103 lines (84 loc) · 2.83 KB
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import java.io.*;
import java.net.*;
import java.util.*;
import java.awt.*;
import javax.swing.*;
public class MultiThreadServer extends JFrame {
// Text area for displaying contents
private JTextArea jta = new JTextArea();
public static void main(String[] args) {
new MultiThreadServer();
}
public MultiThreadServer() {
// Place text area on the frame
setLayout(new BorderLayout());
add(new JScrollPane(jta), BorderLayout.CENTER);
setTitle("MultiThreadServer");
setSize(500, 300);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setVisible(true); // It is necessary to show the frame here!
try {
// Create a server socket
ServerSocket serverSocket = new ServerSocket(8000);
jta.append("MultiThreadServer started at " + new Date() + '\n');
// Number a client
int clientNo = 1;
while (true) {
// Listen for a new connection request
Socket socket = serverSocket.accept();
// Display the client number
jta.append("Starting thread for client " + clientNo +
" at " + new Date() + '\n');
// Find the client's host name, and IP address
InetAddress inetAddress = socket.getInetAddress();
jta.append("Client " + clientNo + "'s host name is "
+ inetAddress.getHostName() + "\n");
jta.append("Client " + clientNo + "'s IP Address is "
+ inetAddress.getHostAddress() + "\n");
// Create a new thread for the connection
HandleAClient task = new HandleAClient(socket);
// Start the new thread
new Thread(task).start();
// Increment clientNo
clientNo++;
}
}
catch(IOException ex) {
System.err.println(ex);
}
}
// Inner class
// Define the thread class for handling new connection
class HandleAClient implements Runnable {
private Socket socket; // A connected socket
/** Construct a thread */
public HandleAClient(Socket socket) {
this.socket = socket;
}
/** Run a thread */
public void run() {
try {
// Create data input and output streams
DataInputStream inputFromClient = new DataInputStream(
socket.getInputStream());
DataOutputStream outputToClient = new DataOutputStream(
socket.getOutputStream());
// Continuously serve the client
while (true) {
// Receive radius from the client
double radius = inputFromClient.readDouble();
// Compute area
double area = radius * radius * Math.PI;
// Send area back to the client
outputToClient.writeDouble(area);
jta.append("radius received from client: " +
radius + '\n');
jta.append("Area found: " + area + '\n');
}
}
catch(IOException e) {
System.err.println(e);
}
}
}
}