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我已经开发了创建p2p聊天程序的代码。我的聊天服务器代码和ChatServerReturns编译，但我一直运行其他程序，并获得在公共静态无效ACTION_B_SEND和公共静态无效ACTION_B_DISCONNECT ChatClientGUI代码上的“非法开始表达式”的错误。 ChatCLIENT代码在public void SEND（String X）上出现同样的错误。我不知道为什么会出现这些错误。 Chat Server Code import java.io. ; import java.net。; import java.util。 ; import javax.swing。;Java聊天P2P代码建议
public class ChatServer
{
//Array list to hold the Sockets
public static ArrayList<Socket> ConnectionArray = new ArrayList<Socket>();
//Array list to hold all of the users
public static ArrayList<String> CurrentUsers = new ArrayList<String>();
public static void main(String[] args) throws Exception
{
try
{
final int PORT = 2345;
ServerSocket SERVER = new ServerSocket(PORT);
System.out.println("Waiting for clients");
while(true)
{
//create new socket object
Socket SOCK = SERVER.accept();
//add to array list of sockets
ConnectionArray.add(SOCK);
System.out.println("Client connected from: "+SOCK.getLocalAddress().getHostName());
AddUserName(SOCK);
ChatServerReturn CHAT = new ChatServerReturn(SOCK);
Thread X = new Thread(CHAT);
X.start();
}
}
catch(Exception X)
{
System.out.print(X);
}
}
public static void AddUserName(Socket X) throws IOException
{
//Crreate scanner object
Scanner INPUT = new Scanner(X.getInputStream());
String UserName = INPUT.nextLine();
CurrentUsers.add(UserName);
for(int i = 1; i <= ChatServer.ConnectionArray.size(); i++)
{
Socket TEMP_SOCK = (Socket) ChatServer.ConnectionArray.get(i-1);
PrintWriter OUT = new PrintWriter(TEMP_SOCK.getOutputStream());
OUT.println("!!!" + CurrentUsers);
OUT.flush();
}
}
}
ChatServerReturn import java.io. ; import java.net。; import java.util。*;
public class ChatServerReturn implements Runnable
{
//Globals
Socket SOCK;
private Scanner INPUT;
private PrintWriter OUT;
String MESSAGE = "";
public ChatServerReturn(Socket X)
{
this.SOCK = X;
}
public void CheckConnection() throws IOException
{
if(!SOCK.isConnected())
{
for(int i = 1; i <= ChatServer.ConnectionArray.size(); i++)
{
if(ChatServer.ConnectionArray.get(i) == SOCK)
{
ChatServer.ConnectionArray.remove(i);
}
}
for(int i = 1; i <= ChatServer.ConnectionArray.size(); i++)
{
Socket TEMP_SOCK = (Socket) ChatServer.ConnectionArray.get(i-1);
PrintWriter TEMP_OUT = new PrintWriter(TEMP_SOCK.getOutputStream());
TEMP_OUT.println(TEMP_SOCK.getLocalAddress().getHostName() + " disconnected.");
TEMP_OUT.flush();
//Show disconnection at SERVER
System.out.println(TEMP_SOCK.getLocalAddress().getHostName() + " disconnected.");
}
}
}
public void run()
{
try
{
try
{
//Create scanner and printwriter object
INPUT = new Scanner(SOCK.getInputStream());
OUT = new PrintWriter(SOCK.getOutputStream());
while(true)
{
CheckConnection();
if(!INPUT.hasNext())
{
return;
}
MESSAGE = INPUT.nextLine();
System.out.println("Client said; " + MESSAGE);
for(int i = 1; i <= ChatServer.ConnectionArray.size(); i++)
{
//
Socket TEMP_SOCK = (Socket) ChatServer.ConnectionArray.get(i-1);
PrintWriter TEMP_OUT = new PrintWriter(TEMP_SOCK.getOutputStream());
TEMP_OUT.println(MESSAGE);
TEMP_OUT.flush();
System.out.println("Sent to: " + TEMP_SOCK.getLocalAddress().getHostName());
}
}
}
finally
{
SOCK.close();
}
}
catch(Exception X)
{
System.out.print(X);
}
}
}
ChatClientGUI import java.io. ; import java.net。; import java.util。 ; import javax.swing。;
public class ChatClientGUI
{
//Globals
private static ChatCLIENT ChatClient;
public static String UserName = "Anonymous";
//GUI Globals for Home Page
public static JFrame MainWindow = new JFrame();
private static JButton B_UNFOLLOW = new JButton();
private static JButton B_CONNECT = new JButton();
private static JButton B_DISCONNECT = new JButton();
private static JButton B_FOLLOW = new JButton();
private static JButton B_SEND = new JButton();
private static JLabel L_Message = new JLabel("Message: ");
public static JTextField TF_Message = new JTextField(20);
private static JLabel L_CONVERSATION = new JLabel();
public static JTextArea TA_CONVERSATION = new JTextArea();
private static JScrollPane SP_CONVERSATION = new JScrollPane();
private static JLabel L_ONLINE = new JLabel();
public static JList JL_ONLINE = new JList();
private static JScrollPane SP_ONLINE = new JScrollPane();
private static JLabel L_LoggedInAs = new JLabel();
private static JLabel L_LoggedInAsBox = new JLabel();
//GUI Globals for Login Screen
public static JFrame LogInWindow = new JFrame();
public static JTextField TF_UserNameBox = new JTextField(20);
private static JButton B_ENTER = new JButton("ENTER");
private static JLabel L_EnterUserName = new JLabel("Enter username: ");
private static JPanel P_Login = new JPanel();
public static void main(String args[])
{
BuildMainWindow();
Initialize();
}
public static void Connect()
{
try
{
final int PORT = 2345;
final String HOST = "The Plug";
Socket SOCK = new Socket(HOST,PORT);
System.out.println("You connected to: "+ HOST);
//Passing to CHATCLIENT class
ChatClient = new ChatCLIENT(SOCK);
//Send Name to add to "Online" List
PrintWriter OUT = new PrintWriter(SOCK.getOutputStream());
OUT.println(UserName);
OUT.flush();
Thread X = new Thread(ChatClient);
X.start();
}
catch(Exception X)
{
System.out.print(X);
JOptionPane.showMessageDialog(null, "Server not responding.");
System.exit(0);
}
}
public static void Initialize();
{
B_SEND.setenabled(false);
B_DISCONNECT.setEnabled(false);
B_CONNECT.setEnabled(true);
}
public static void BuildLogInWindow()
{
LogInWindow.setTitle("Enter your name: ");
LogInWindow.setSize(300,100);
LogInWindow.setLocation(300,200);
LogInWindow.setResizable(false);
P_LogIn = new JPanel();
P_LogIn.add(L_EnterUserName);
P_LogIn.add(TF_UserNameBox);
P_LogIn.add(B_ENTER);
LogInWindow.add(P_LogIn);
Login_Action();
LogInWindow.setVisible(true);
}
public static void BuildMainWindow()
{
MainWindow.setTitle(UserName + "'s Chat Box");
MainWindow.setSize(500,500);
MainWindow.setLocation(200,200);
MainWindow.setResizable(false);
ConfigureMainWindow();
MainWindow_Action();
MainWindow.setVisible(true);
}
public static void ConfigureMainWindow()
{
MainWindow.setBackground(new java.awt.Color(255, 255, 255));
MainWindow.setSize(500, 350);
MainWindow.getContentPane().setLayout(null);
B_SEND.setBackground(new java.awt.Color(0, 0, 255));
B_SEND.setForeground(new java.awt.Color(255, 255, 255));
B_SEND.setText("SEND");
MainWindow.getContentPane().add(B_SEND);
B_SEND.setBounds(250,40, 80, 25);
B_DISCONNECT.setBackground(new java.awt.Color(0, 0, 255));
B_DISCONNECT.setForegroudn(new java.awt.Color(255, 255, 255));
B_DISCONNECT.setText("End Connection");
MainWindow.getContentPane().add(B_DISCONNECT);
B_DISCONNECT.setBounds(10, 40, 110, 25);
B_CONNECT.setBackground(new java.awt.Color(0, 0, 255));
B_CONNECT.setForeground(new java.awt.Color(255, 255, 255));
B_CONNECT.setText("Connect");
B_CONNECT.setToolTipText("");
MainWindow.getContentPane().add(B_CONNECT);
B_CONNECT.setBounds(10, 40, 110, 25);
B_FOLLOW.setBackground(new java.awt.Color(0, 0, 255));
B_FOLLOW.setForeground(new java.awt.Color(255, 255, 255));
B_FOLLOW.setText("HELP");
MainWindow.getContentPane().add(B_FOLLOW);
B_FOLLOW.setBounds(10, 40, 110, 25);
B_UNFOLLOW.setBackground(new java.awt.Color(0, 0, 255));
B_UNFOLLOW.setForeground(new java.awt.Color(255, 255, 255));
B_UNFOLLOW.setText("ABOUT");
MainWindow.getContentPane().add(B_UNFOLLOW);
B_UNFOLLOW.setBounds(300, 40, 75, 25);
L_Message.setText("Message: ");
MainWindow.getContentPane().add(L_MESSAGE);
L_Message.setBounds(10, 10, 50, 20);
TF_Message.setForeground(new java.awt.Color(0, 0, 255));
TF_Message.requestFocus();
MainWindow.getContentPane().add(TF_Message);
TF_Message.setBounds(60, 5, 240, 30);
L_Conversation.setHorizontalAlignment(SwingConstants.CENTER);
L_Conversation.setText("Conversation");
MainWindow.getContentPane().add(L_Conversation);
L_Conversation.setBounds(100, 60, 120, 16);
TA_CONVERSATION.setColumns(20);
TA_CONVERSATION.setFont(new java.awt.Font("Arial", 0, 10));
TA_CONVERSATION.setForeground(new java.awt.Color(0, 0, 255));
TA_CONVERSATION.setLineWrap(true);
TA_CONVERSATION.setRows(7);
TA_CONVERSATION.setEditable(false);
SP_CONVERSATION.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
SP_CONVERSATION.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);
SP_CONVERSATION.setViewportView(TA_CONVERSATION);
MainWindow.getContentPane().add(SP_CONVERSATION);
SP_CONVERSATION.setBounds(10, 100, 300, 150);
L_ONLINE.setHorizontalAlignment(SwingConstants.CENTER);
L_ONLINE.setText("Now Online");
L_ONLINE.setToolTipText("");
MainWindow.getContentPane().add(L_ONLINE);
L_ONLINE.setBounds(300, 50, 150, 20);
String [] TestNames = ("Brandon");
String [] TestNames = ("Mike");
String [] TestNames = ("Deloris");
String [] TestNames = ("Crystal");
JL_ONLINE.setForeground(new java.awt.Color(0, 0, 255));
JL_ONLINE.setListData(TestNames);
SP_ONLINE.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
SP_ONLINE.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);
SP_ONLINE.setViewportView(JL_ONLINE);
MainWindow.getContentPane().add(SP_ONLINE);
SP_ONLINE.setBounds(350, 100, 100, 200);
L_LoggedInAs.setFont(new java.awt.Font("Arial", 0, 10));
L_LoggedInAs.setText("Logged In As: ");
MainWindow.getContentPane().add(L_LoggedInAs);
L_LoggedInAs.setBounds(300, 0, 150, 15);
L_LoggedInAsBox.setHorizontalAlignment(SwingConstants.CENTER);
L_LoggedInAsBox.setFont(new java.awt.Font("Arial", 0, 10));
L_LoggedInAsBox.setForeground(new java.awt.Color(255, 0, 0));
L_LoggedInAsBox.setBorder(BorderFactory.createLineBorder(new java.awt.Color(0, 0, 0)));
MainWindow.getContentPane().add(L_LoggedInAsBox);
L_LoggedInAsBox.setBounds(350, 20, 150, 20);
}
public static void Login_Action()
{
B_ENTER.addActionListener(
new java.awt.event.ActionListener()
{
public void actionPerformed(java.awt.event.Actionevent evt)
{
ACTION_B_ENTER();
}
}
);
}
public static void ACTION_B_ENTER()
{
if(!TF_UserNameBox.getText().equals(""))
{
UserName = TF_UserNameBox.getText().trim();
L_LoggedInAsBox.setText(UserName);
ChatServer.CurrentUsers.add(UserName);
MainWindow.setTitle(UserName + "'s Chat Box");
LogInWindow.setVisible(false);
B_SEND.setEnabled(true);
B_DISCONNECT.setEnabled(true);
B_CONNECT.setEnabled(false);
Connect();
}
else
{
JOptionPane.showMessageDialog(null, "Please enter a name.");
}
}
public static void MainWindow_Action()
{
B_SEND.addActionListener(
new java.awt.event.ActionListener()
{
public void actionPerformed(java.awt.event.ActionEvent evt)
{
ACTION_B_SEND();
}
}
B_DISCONNECT.addActionListener(
new java.awt.event.ActionListener()
{
public void actionPerformed(java.awt.event.ActionEvent evt)
{
ACTION_B_DISCONNECT();
}
};
)
B_CONNECT.addActionListener(
new java.awt.event.ActionListener()
{
public void actionPerformed(java.awt.event.ActionEvent evt)
{
ACTION_B_CONNECT();
}
};
)
B_FOLLOW.addActionListener(
new java.awt.event.ActionListener()
{
public void actionPerformed(java.awt.event.ActionEvent evt)
{
ACTION_B_FOLLOW();
}
};
)
B_UNFOLLOW.addActionListener(
new java.awt.event.ActionListener()
{
public void actionPerformed(java.awt.event.ActionEvent evt)
{
ACTION_B_UNFOLLOW();
}
};
)
public static void ACTION_B_SEND()
{
if(!TF_Message.getText().equals(""))
{
ChatClient.SEND(TF_Message.getText());
TF_Message.requestFocus();
}
}
public static void ACTION_B_DISCONNECT()
{
try
{
ChatClient.DISCONNECT();
}
catch(Exception Y)
{
Y.printStackTrace();
}
}
}
ChatCLIENT代码 import java.net。 ; import java.io.; import java.util。 ; import javax.swing。;
public class ChatCLIENT implements Runnable
{
//Globals
Socket SOCK;
Scanner INPUT;
Scanner SEND = new Scanner(System.in);
PrintWriter OUT;
public ChatCLIENT(Socket X)
{
this.SOCK = X;
}
public void run()
{
try
{
try
{
INPUT = new Scanner(SOCK.getInputStream());
OUT = new PrintWriter(SOCK.getOutputStream());
OUT.flush();
CheckStream();
}
finally
{
SOCK.close();
}
}
catch(Exception X)
{
System.out.print(X);
}
}
public void DISCONNECT() throws IOException
{
OUT.println(ChatClientGUI.UserName + " has disconnected.");
OUT.flush();
SOCK.close();
JOptionPane.showMessageDialog(null, "You disconnected.");
System.exit(0);
}
public void CheckStream()
{
while(true)
{
RECEIVE();
}
}
public void RECEIVE()
{
if(INPUT.hasNext())
{
String MESSAGE = INPUT.nextLine();
if(MESSAGE.contains("!!"))
{
String TEMP1 = MESSAGE.substring(3);
TEMP1 = TEMP1.replace("[","");
TEMP1 = TEMP1.replace("]","");
String[] CurrentUsers = TEMP1.split(", ");
ChatClientGUI.JL_ONLINE.setListData(CurrentUsers);
}
else
{
ChatClientGUI.TA_CONVERSATION.append(MESSAGE + "\n");
}
}
public void SEND(String X);
{
OUT.println(ChatClientGUI.UserName + ": " + X);
OUT.flush();
ChatClientGUI.TF_Message.setText("");
}
};
删除';''后公共静态无效初始化（）;' – zapl 2014-12-08 00:49:46
谢谢@zapl那些似乎总是给我弄。 – Lucas 2014-12-08 01:05:59