client.java

简单java聊天室

import java.io.*;
import java.net.*;
import javax.swing.JOptionPane;


public class Client {
    Socket socket=null;
    public static String  host=null;
    public static String  hostname=null;
    private boolean connected = false;
    public Client(){}
    public boolean isConnected() { return connected; }
    
    public Client(String getip,String hostname){
    	host=getip;
        this.hostname=hostname;
        new ChatApplet(hostname);
           }
   
   
      
   
    
    public Client(ChatApplet applet)   {
    	
    	
        try {
        	 System.out.println("获取IP");
        	
        	//login_frame login_information=new login_frame();
        	
        	
           if(host.equals(""))JOptionPane.showMessageDialog(null,"请输入IP，该项不能为空!");
        		
        	else {
        	     	
        	//host=getip;
        	//JOptionPane.showMessageDialog(null,host);
            Thread.currentThread().sleep(2000);
            System.out.println("准备连接......");
            
            try{
            socket = new Socket(host,Server.port);
            Thread.currentThread().sleep(1000);
            System.out.println("发送请求");
            connected = true;
            System.out.println("正在连接服务......");
            new ClientRecieveThread(socket, applet).start();
            Thread.currentThread().sleep(1000);
            System.out.println("连接成功.....");
            
            
            }catch(ConnectException ex){
            	
            	System.out.print("连接失败\n");}
          }
        }
        catch(java.lang.NullPointerException ex){
        	JOptionPane.showMessageDialog(null,"请输入IP，该项不能为空!");
        }
        catch (Exception ex) {
        	
            applet.appendMessage(ex.getMessage());
            ex.printStackTrace(System.err);
        }
        
        
    }

    public PrintWriter getOutputStream() throws IOException {
        return new PrintWriter(socket.getOutputStream(), true);
    }
}