局域网语音java

⑴ 求 java ICMP 扫描局域网所有主机的代码

importjava.net.InetAddress;
importjava.net.UnknownHostException;
importjava.io.*;
publicclassIpName{
staticpublicvoidmain(String[]args){
try{
//通过主机名称得到IP地址
//InetAddressaddress=InetAddress.getByName(args[0]);
//System.out.println(args[0]+":"+address.getHostAddress());

//通过IP得到主机名称
Stringips="192.168.0.";
Stringip;
InetAddressaddip;
for(inti=1;i<255;i++){
ip=ips+i;
addip=InetAddress.getByName(ip);
System.out.println(ip+":"+addip.getHostName());

}

}
catch(UnknownHostExceptionuhe){
System.err.println("Unabletofind:"+ip);

}
}
}

⑵ 急求一个JAVA编写的局域网聊天代码不要求很复杂。只要可以在两台机子上简单的对话就可以。

客户端：
import java.io.*;
import java.net.*;
import java.awt.*;
import java.awt.event.*;

public class ChatClient extends Frame
{
TextArea ta = new TextArea();
TextField tf = new TextField();
public void launchFrame() throws Exception
{
this.add(ta, BorderLayout.CENTER);
this.add(tf, BorderLayout.SOUTH);
tf.addActionListener(
new ActionListener()
{
public void actionPerformed(ActionEvent ae)
{
try {
String sSend = tf.getText();
if(sSend.trim().length() == 0) return;
ChatClient.this.send(sSend);
tf.setText("");
ta.append(sSend + "\n");
}
catch (Exception e) { e.printStackTrace(); }
}
}
);

this.addWindowListener(
new WindowAdapter()
{
public void windowClosing(WindowEvent e)
{
System.exit(0);
}
}
);
setBounds(300,300,300,400);
setVisible(true);
tf.requestFocus();
}

Socket s = null;

public ChatClient() throws Exception
{
s = new Socket("127.0.0.1", 8888);
launchFrame();
(new Thread(new ReceiveThread())).start();
}

public void send(String str) throws Exception
{
DataOutputStream dos = new DataOutputStream(s.getOutputStream());
dos.writeUTF(str);
}

public void disconnect() throws Exception
{
s.close();
}

public static void main(String[] args) throws Exception
{
BufferedReader br = new BufferedReader (
new InputStreamReader(System.in));
ChatClient cc = new ChatClient();
String str = br.readLine();
while(str != null && str.length() != 0)
{
cc.send(str);
str = br.readLine();
}
cc.disconnect();
}

class ReceiveThread implements Runnable
{
public void run()
{
if(s == null) return;
try {
DataInputStream dis = new DataInputStream(s.getInputStream());
String str = dis.readUTF();
while (str != null && str.length() != 0)
{
//System.out.println(str);
ChatClient.this.ta.append(str + "\n");
str = dis.readUTF();
}
}
catch (Exception e)
{
e.printStackTrace();
}

}
}
}

服务器：
import java.net.*;
import java.util.*;
import java.io.*;
import java.awt.*;
import java.awt.event.*;

public class ChatServer extends Frame
{
TextArea ta = new TextArea();
public void launchFrame()
{
add(ta, BorderLayout.CENTER);
setBounds(0,0,200,300);
this.addWindowListener(
new WindowAdapter()
{
public void windowClosing(WindowEvent e)
{
System.exit(0);
}
}
);
setVisible(true);
}

ServerSocket server = null;
Collection cClient = new ArrayList();

public ChatServer(int port) throws Exception
{
server = new ServerSocket(port);
launchFrame();
}

public void startServer() throws Exception
{
while(true)
{
Socket s = server.accept();
cClient.add( new ClientConn(s) );
ta.append("NEW-CLIENT " + s.getInetAddress() + ":" + s.getPort());
ta.append("\n" + "CLIENTS-COUNT: " + cClient.size() + "\n\n");
}
}

class ClientConn implements Runnable
{
Socket s = null;
public ClientConn(Socket s)
{
this.s = s;
(new Thread(this)).start();
}

public void send(String str) throws IOException
{
DataOutputStream dos = new DataOutputStream(s.getOutputStream());
dos.writeUTF(str);
}

public void dispose()
{
try {
if (s != null) s.close();
cClient.remove(this);
ta.append("A client out! \n");
ta.append("CLIENT-COUNT: " + cClient.size() + "\n\n");
}
catch (Exception e)
{
e.printStackTrace();
}
}

public void run()
{
try {

DataInputStream dis = new DataInputStream(s.getInputStream());
String str = dis.readUTF();
while(str != null && str.length() !=0)
{
System.out.println(str);
for(Iterator it = cClient.iterator(); it.hasNext(); )
{
ClientConn cc = (ClientConn)it.next();
if(this != cc)
{
cc.send(str);
}
}
str = dis.readUTF();
//send(str);
}
this.dispose();
}
catch (Exception e)
{
System.out.println("client quit");
this.dispose();
}

}
}

public static void main(String[] args) throws Exception
{
ChatServer cs = new ChatServer(8888);
cs.startServer();
}
}
（来自BJSXT）