Java聊天室——实现多人聊天、私聊、群聊

客户端

package project.java;
//客户端
//输入、输出流分别为处于一个线程

import java.io.IOException;
import java.io.PrintStream;
import java.net.Socket;
import java.util.Scanner;

class OutToServer2 implements Runnable{
	private Socket client;
	
	public OutToServer2(Socket client) {
		super();
		this.client = client;
	}

	@Override
	public void run() {
		PrintStream printStream;
		try {
			printStream = new PrintStream(client.getOutputStream(),true);
			Scanner scanner = new Scanner(System.in);
			scanner.useDelimiter("\n");
			while(true) {
				System.out.println("请输入：");
				while(scanner.hasNext()) {
					String string = scanner.nextLine();
					printStream.println(string);
					if(string.equals("拜拜")) {
						System.out.println("客户端退出");
						printStream.close();
						scanner.close();
					    //client.close();
						break;
					}
				}
			}
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
	
}

class ReadFromServer2 implements Runnable{
	private Socket client;
	public ReadFromServer2(Socket client) {
		super();
		this.client = client;
	}
	public void run() {
		try {
			Scanner scanner = new Scanner(client.getInputStream());
			scanner.useDelimiter("\n");
			while(sc