chatclient.java

java应用开发详解

import java.net.*;
import java.io.*;

public class ChatClient {
	
	Socket socket;
	DataInputStream input;
	DataInputStream user;
	PrintStream output;
	
	public ChatClient() {
  		try {
  			socket = new Socket("localhost",8123);
  			input = new DataInputStream( socket.getInputStream() );
			output = new PrintStream( socket.getOutputStream() );
  		} catch(IOException e) {
  			System.out.println("Abnormal chat client socket condition: "+ e );
  		}

		user = new DataInputStream( System.in );
		String s = new String();
		
		System.out.println("This is Chat Client.");
		System.out.println("Enter your text: (Hit [Enter] twice to exit)");
		
		do {
			try {
				s = user.readLine();
				output.println(s);
				output.flush();
			} catch(IOException e) {}
			
			
			System.out.println("User entered: " + s);
		} while ( !s.equals("") );

		output.close();

	}


	public static void main(String[] args) {
		new ChatClient();
	}
}