我有这个代码是一个聊天客户端，可以与我正在使用的服务器一起工作。在textEnter字段中，我想要它，所以如果按Enter键，它就会像单击“发送”按钮一样执行相同的操作。如果你们中的任何一个人能帮我找到办法，我将非常感激。
package TryOne;
/* Things to do
* 1.fix (java.lang.ArrayIndexOutOfBoundsException: 2) "remove spaces and new lines after text"
* 2.fix user names not being cleared after disconnect
* 3.fix server chat logs
* 4.
*/
import java.net.*;
import java.awt.event.KeyEvent;
import java.io.*;
import java.util.*;
import javax.swing.JTextField;
public class ChatClient extends javax.swing.JFrame {
static String username; /* if user names don't copy to the field correctly remove static*/
String serverIP = "localhost";
int Port = 13;
Socket sock;
BufferedReader reader;
PrintWriter writer;
ArrayList < String > userList = new ArrayList();
Boolean isConnected = false;
static Boolean isPressed = false;
/** Creates new form Chat */
public ChatClient() {
initComponents();
}
public class IncomingReader implements Runnable {
public void run() {
String[] data;
String stream, done = "Done", connect = "Connect", disconnect = "Disconnect", chat = "Chat";
/*if(isPressed){
sendButton.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
sendButtonActionPerformed(evt);
System.out.println(evt);
}});
isPressed = false;
}*/
try {
while ((stream = reader.readLine()) != null) {
data = stream.split(":");
if (data[2].equals(chat)) {
chatTextArea.append(data[0] + ": " + data[1] + "\n");
chatTextArea.setCaretPosition(chatTextArea
.getDocument().getLength());
} else if (data[2].equals(connect)) {
chatTextArea.removeAll();
userAdd(data[0]);
} else if (data[2].equals(disconnect)) {
userRemove(data[0]);
} else if (data[2].equals(done)) {
usersList.setText("");
writeUsers();
userList.clear();
}
}
} catch (Exception ex) {}
}
}
public void ListenThread() {
Thread IncomingReader = new Thread(new IncomingReader());
IncomingReader.start();
}
public void userAdd(String data) {
userList.add(data);
}
public void userRemove(String data) {
chatTextArea.append(data + " has disconnected.\n");
}
public void writeUsers() {
String[] tempList = new String[(userList.size())];
userList.toArray(tempList);
for (String token: tempList) {
usersList.append(token + "\n");
}
}
public void sendDisconnect() {
String bye = (username + ": :Disconnect");
try {
writer.println(bye); // Sends server the disconnect signal.
writer.flush(); // flushes the buffer
} catch (Exception e) {
chatTextArea.append("Could not send Disconnect message.\n");
}
}
public void Disconnect() {
try {
chatTextArea.append("Disconnected.\n");
sock.close();
} catch (Exception ex) {
chatTextArea.append("Failed to disconnect. \n");
}
isConnected = false;
usernameField.setEditable(true);
usersList.setText("");
}
/**
* This method is called from within the constructor to initialize the form.
* WARNING: Do NOT modify this code. The content of this method is always
* regenerated by the Form Editor.
*/
@
SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
jScrollPane1 = new javax.swing.JScrollPane();
inputTextArea = new javax.swing.JTextArea();
jScrollPane2 = new javax.swing.JScrollPane();
chatTextArea = new javax.swing.JTextArea();
jLabel1 = new javax.swing.JLabel();
usernameField = new javax.swing.JTextField();
connectButton = new javax.swing.JButton();
disconnectButton = new javax.swing.JButton();
sendButton = new javax.swing.JButton();
jScrollPane3 = new javax.swing.JScrollPane();
usersList = new javax.swing.JTextArea();
jLabel2 = new javax.swing.JLabel();
jMenuBar1 = new javax.swing.JMenuBar();
jMenu1 = new javax.swing.JMenu();
jMenuItem1 = new javax.swing.JMenuItem();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
setTitle("Chat Client");
inputTextArea.setColumns(20);
inputTextArea.setLineWrap(true);
inputTextArea.setRows(5);
jScrollPane1.setViewportView(inputTextArea);
chatTextArea.setColumns(20);
chatTextArea.setEditable(false);
chatTextArea.setFont(new java.awt.Font("Times New Roman", 0, 12)); // NOI18N
chatTextArea.setLineWrap(true);
chatTextArea.setRows(5);
jScrollPane2.setViewportView(chatTextArea);
jLabel1.setText("Username:");
usernameField.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
usernameFieldActionPerformed(evt);
}
});
connectButton.setText("Connect");
connectButton.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
connectButtonActionPerformed(evt);
}
});
disconnectButton.setText("Disconnect");
disconnectButton.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
disconnectButtonActionPerformed(evt);
}
});
sendButton.setText("Send");
sendButton.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
sendButtonActionPerformed(evt);
System.out.println(evt);
}
});
usersList.setEditable(false);
usersList.setColumns(20);
usersList.setRows(5);
jScrollPane3.setViewportView(usersList);
jLabel2.setHorizontalAlignment(javax.swing.SwingConstants.CENTER);
jLabel2.setText("Online Users");
jMenu1.setText("File");
jMenuItem1.setText("Settings");
jMenuItem1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jMenuItem1ActionPerformed(evt);
}
});
jMenu1.add(jMenuItem1);
jMenuBar1.add(jMenu1);
setJMenuBar(jMenuBar1);
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(
getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(layout
.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(
javax.swing.GroupLayout.Alignment.TRAILING,
layout.createSequentialGroup()
.addContainerGap()
.addGroup(
layout.createParallelGroup(
javax.swing.GroupLayout.Alignment.TRAILING)
.addGroup(
javax.swing.GroupLayout.Alignment.LEADING,
layout.createSequentialGroup()
.addGap(4, 4, 4)
.addComponent(
jScrollPane1,
javax.swing.GroupLayout.PREFERRED_SIZE,
336,
javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(
javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(
sendButton,
javax.swing.GroupLayout.DEFAULT_SIZE,
javax.swing.GroupLayout.DEFAULT_SIZE,
Short.MAX_VALUE))
.addComponent(
jScrollPane2,
javax.swing.GroupLayout.Alignment.LEADING,
javax.swing.GroupLayout.PREFERRED_SIZE,
419,
javax.swing.GroupLayout.PREFERRED_SIZE)
.addGroup(
layout.createSequentialGroup()
.addComponent(
jLabel1,
javax.swing.GroupLayout.PREFERRED_SIZE,
71,
javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(
javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
.addComponent(
usernameField,
javax.swing.GroupLayout.PREFERRED_SIZE,
153,
javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(
javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(
connectButton)
.addGap(18, 18,
18)
.addComponent(
disconnectButton)))
.addPreferredGap(
javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
.addGroup(
layout.createParallelGroup(
javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(
jLabel2,
javax.swing.GroupLayout.DEFAULT_SIZE,
javax.swing.GroupLayout.DEFAULT_SIZE,
Short.MAX_VALUE)
.addComponent(jScrollPane3))
.addContainerGap()));
layout.setVerticalGroup(layout
.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(
layout.createSequentialGroup()
.addContainerGap()
.addGroup(
layout.createParallelGroup(
javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(disconnectButton)
.addComponent(connectButton)
.addComponent(
usernameField,
javax.swing.GroupLayout.PREFERRED_SIZE,
javax.swing.GroupLayout.DEFAULT_SIZE,
javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(
jLabel1,
javax.swing.GroupLayout.DEFAULT_SIZE,
26, Short.MAX_VALUE)
.addComponent(jLabel2))
.addPreferredGap(
javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
.addGroup(
layout.createParallelGroup(
javax.swing.GroupLayout.Alignment.TRAILING,
false)
.addGroup(
layout.createSequentialGroup()
.addComponent(
jScrollPane2,
javax.swing.GroupLayout.PREFERRED_SIZE,
261,
javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(
javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addGroup(
layout.createParallelGroup(
javax.swing.GroupLayout.Alignment.TRAILING,
false)
.addComponent(
sendButton,
javax.swing.GroupLayout.DEFAULT_SIZE,
javax.swing.GroupLayout.DEFAULT_SIZE,
Short.MAX_VALUE)
.addComponent(
jScrollPane1,
javax.swing.GroupLayout.DEFAULT_SIZE,
69,
Short.MAX_VALUE)))
.addComponent(jScrollPane3))
.addContainerGap()));
pack();
} // </editor-fold>
private void connectButtonActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
if (isConnected == false) {
username = usernameField.getText();
usernameField.setEditable(false);
try {
sock = new Socket(serverIP, Port);
InputStreamReader streamreader = new InputStreamReader(
sock.getInputStream());
reader = new BufferedReader(streamreader);
writer = new PrintWriter(sock.getOutputStream());
writer.println(username + ":has connected.:Connect"); // Displays
// to
// everyone
// that
// user
// connected.
writer.flush(); // flushes the buffer
isConnected = true; // Used to see if the client is connected.
} catch (Exception ex) {
chatTextArea.append("Cannot Connect! Try Again. \n");
usernameField.setEditable(true);
}
ListenThread();
} else if (isConnected == true) {
chatTextArea.append("You are already connected. \n");
}
}
private void disconnectButtonActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
sendDisconnect();
Disconnect();
}
public void keyPressed(KeyEvent e) {
int key = e.getKeyCode();
}
private void sendButtonActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
String nothing = "";
if ((inputTextArea.getText()).equals(nothing)) {
inputTextArea.setText("");
inputTextArea.requestFocus();
} else {
try {
writer.println(username + ":" + inputTextArea.getText() + ":" + "Chat");
writer.flush(); // flushes the buffer
} catch (Exception ex) {
chatTextArea.append("Message was not sent. \n");
}
inputTextArea.setText("");
inputTextArea.requestFocus();
}
inputTextArea.setText("");
inputTextArea.requestFocus();
}
private void jMenuItem1ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
// new SettingsWindow().setVisible(true);
}
private void usernameFieldActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
}
/**
* @param args
* the command line arguments
*/
public static void main(String args[]) {
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new ChatClient().setVisible(true);
}
});
}
// Variables declaration - do not modify
private javax.swing.JTextArea chatTextArea;
private javax.swing.JButton connectButton;
private javax.swing.JButton disconnectButton;
private javax.swing.JTextArea inputTextArea;
private javax.swing.JLabel jLabel1;
private javax.swing.JLabel jLabel2;
private javax.swing.JMenu jMenu1;
private javax.swing.JMenuBar jMenuBar1;
private javax.swing.JMenuItem jMenuItem1;
private javax.swing.JScrollPane jScrollPane1;
private javax.swing.JScrollPane jScrollPane2;
private javax.swing.JScrollPane jScrollPane3;
private javax.swing.JButton sendButton;
private javax.swing.JTextField usernameField;
private javax.swing.JTextArea usersList;
// End of variables declaration
}
答案 0 :(得分：4)
不，永远不要在文本组件中使用KeyListener。这里你只需要在你的JTextField中添加一个ActionListener，在这个按钮上使用的那个应该可以正常工作。
事实上，你已经完成了这个，但你还没有搞定它。尝试更改此内容：
usernameField.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
usernameFieldActionPerformed(evt);
}
});
到
usernameField.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
// use the actionPerformed method you've already created for the send button
sendButtonActionPerformed(evt);
System.out.println(evt);
}
});
您还应该避免使用NetBeans窗口构建器来创建GUI，而是手动编写代码，因为这将有助于您学习Swing库。