我编写了这个简单的 JFRAME 程序，它由两个类组成：客户端和服务器。
服务器从客户端接收文本并打印出来。
我刚开始学习它，所以我真的不知道问题是什么。
我想问题是while循环或我获取输入的方式。请告诉我我做错了什么以及如何解决它:)
这是服务器：
import java.awt.Event;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.beans.EventHandler;
import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.net.*;
import javax.swing.*;
public class Server extends JFrame {
private int running =0;
private JPanel showInformation;
private JButton start;
private JButton stop;
private JTextArea infoArea;
private JScrollPane scroll;
private ServerSocket server;
private Socket client;
private InputStreamReader IR;
private BufferedReader BR;
public Server(){
//setting looks of Frame
setLayout(null);
showInformation=new JPanel();
start = new JButton("Start Server");
stop=new JButton("Stop Server");
infoArea= new JTextArea(20,27);
infoArea.setEnabled(false);
infoArea.setEditable(false);
scroll = new JScrollPane(infoArea);
scroll.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
scroll.setBounds(25,10,325,200);
scroll.setEnabled(true);
add(scroll);
showInformation.setSize(300, 200);
showInformation.setBounds(25,5,325,200);
add(showInformation);
infoArea.setLineWrap(true);
start.setBounds(25,225,150,50);
stop.setBounds(200,225,150,50);
add(start);
add(stop);
//events stuff
eventHandler handler = new eventHandler();
start.addActionListener(handler);
stop.addActionListener(handler);
//sockets
}
public void printOnScreen(String m){
infoArea.append("\n"+m);
}
public class eventHandler implements ActionListener{
public void actionPerformed(ActionEvent e) {
if(e.getSource()==start){
if(isServerRunning()){
printOnScreen("Server already running");
}
else{
try{
startServer();
}catch(Exception e1){
}
}
}else
if(e.getSource()==stop){
if(isServerRunning()){
try{
stopServer();
}catch(Exception e1){
}
}
else{
printOnScreen("Server Not Running yet");
}
}
}
}
public boolean isServerRunning(){
if(running==1)
return true;
else
return false;
}
public void startServer() throws Exception{
server = new ServerSocket(4444);
client = server.accept();
IR = new InputStreamReader(client.getInputStream());
BR = new BufferedReader(IR);
printOnScreen("Server started..");
getMessages();
}
public void stopServer() throws Exception{
try{
server.close();
client.close();
IR.close();
BR.close();
printOnScreen("Server stopped..");
}catch(Exception e1){
}
}
private void getMessages() throws IOException{
String M = BR.readLine();
while(true){
if(M!=null){
printOnScreen(M);
}
M = BR.readLine();
}
}
public static void main(String[]args){
Server s = new Server();
s.setDefaultCloseOperation(EXIT_ON_CLOSE);
s.setSize(385, 350);
s.setVisible(true);
s.setTitle(" ----Server----");
s.setTitle("Server Manager");
}
}
这是客户：
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.net.Socket;
import java.net.UnknownHostException;
import javax.swing.*;
public class client1 extends JFrame{
private int connected = 0;
private JTextArea txt;
private JTextField mText;
private JButton sendMessage;
private JScrollPane scroll;
private JButton connect;
private JButton disconnect;
private Socket socket;
private ObjectInputStream input;
private ObjectOutputStream output;
public client1(){
setLayout(null);
txt = new JTextArea();
scroll = new JScrollPane(txt);
scroll.setBounds(25,10,325,200);
add(scroll);
mText = new JTextField();
mText.setBounds(25,220,250,30);
add(mText);
sendMessage=new JButton("Send");
sendMessage.setBounds(280,220,70,30);
add(sendMessage);
connect= new JButton("Connect");
connect.setBounds(25,260,100,30);
add(connect);
disconnect = new JButton("Disconnect");
disconnect.setBounds(135,260,100,30);
add(disconnect);
//events stuff
eventHandler handler = new eventHandler();
sendMessage.addActionListener(handler);
connect.addActionListener(handler);
disconnect.addActionListener(handler);
}
public class eventHandler implements ActionListener{
public void actionPerformed(ActionEvent e) {
if(e.getSource()==sendMessage){
if(connected==1){
try {
sendMessage();
} catch (IOException e1) {
e1.printStackTrace();
}
}
}
else
if(e.getSource()==connect){
connected=1;
printOnScreen("connected");
}
else
if(e.getSource()==disconnect){
connected=0;
printOnScreen("Disconnected");
}
}
}
public void printOnScreen(String m){
txt.append("\n"+m);
}
public void sendMessage() throws IOException{
String message = mText.getText();
txt.append("\nclient1: "+message);
output.writeObject(message);
}
public void connect() throws UnknownHostException, IOException{
socket = new Socket("localhost",4444);
output = new ObjectOutputStream(socket.getOutputStream());
output.flush();
}
public static void main(String[]args){
client1 c1Frame = new client1();
c1Frame.setDefaultCloseOperation(EXIT_ON_CLOSE);
c1Frame.setSize(385,350);
c1Frame.setTitle(" ---___Client1___---");
c1Frame.setVisible(true);
}
}