在Java中处理按键的最佳方法是什么？我试图设置我的KeyListener代码，但后来我看到在线KeyBinding是应该使用的但是在阅读之后
http://download.oracle.com/javase/tutorial/uiswing/misc/keybinding.html
并且无法在线找到任何教程我更加困惑。
以下是我一直在尝试的事情：
frame = new JFrame("Jay's Game Title");
Container panel = (JPanel)frame.getContentPane();
...
panel.setFocusable(true);
panel.requestFocus();
panel.addKeyListener(this);//TODO:fix me please, this is not working
frame.setSize(1024, 768);
frame.setVisible(true);
frame.setFocusable(false);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
但无济于事。任何帮助都非常感谢，与此同时，我将继续查看其他人的帖子，并将更多的头发拉出来。
注意：我的按钮代码工作得非常好，我希望能够在另一个keypresses.java文件中处理我的按键，以保持其有序
package com.jayavon.game.client;
/****************************************************************
* Author : ***REMOVED***
* Start Date : 09/04/2011
* Last Update : 10/04/2011
*
* Description
* This is the video game application
* This application is used to sending and receiving the messages
* and all of the game data(soon, hopefully :p).
*
* Remarks
* Before running the client application make sure the server is
* running.
******************************************************************/
import javax.swing.*;
import java.awt.Container;
import java.awt.event.*;
import java.io.*;
import java.net.*;
import java.util.ArrayList;
import java.util.Iterator;
public class MyClient extends JFrame implements ActionListener, KeyListener{
JFrame frame;
JTextField chatBoxTxt;
JButton sendButton, exitButton, onlineButton, backpackButton, characterButton, helpButton, optionsButton, questsButton, skillsButton;
JInternalFrame skillsFrame, onlineFrame;
DefaultListModel modelChatList;
JList listForChat;
JScrollPane chatScrollPane;
DefaultListModel modelUserList;
JList listForUsers;
JScrollPane userListScrollPane;
String name, password;
Socket s, s1, s2;
DataInputStream messageIn;
DataOutputStream messageOut;
DataInputStream userNameIn;
DataOutputStream userNameOut;
DataOutputStream userLogOut;
MyClient(String name, String password) throws IOException{
this.name = name;
initGUI();
s = new Socket("localhost",1004); //creates a socket object
s1 = new Socket("localhost",1004);
s2 = new Socket("localhost",1004);
//create input-stream for a particular socket
messageIn = new DataInputStream(s.getInputStream());
//create output-stream
messageOut = new DataOutputStream(s.getOutputStream());
//sending a message for login
messageOut.writeUTF(name + " has joined the game.");
userLogOut = new DataOutputStream(s1.getOutputStream());
userNameOut = new DataOutputStream(s2.getOutputStream());
userNameIn = new DataInputStream(s2.getInputStream());
//creating a thread for maintaining the list of user name
MyUserNameReciever userNameReciever = new MyUserNameReciever(userNameOut, modelUserList, name, userNameIn);
Thread userNameRecieverThread = new Thread(userNameReciever);
userNameRecieverThread.start();
//creating a thread for receiving a messages
MyMessageReciever messageReciever = new MyMessageReciever(messageIn, modelChatList);
Thread messageRecieverThread = new Thread(messageReciever);
messageRecieverThread.start();
}
public void initGUI(){
frame = new JFrame("Jay's Game Title");
Container panel = (JPanel)frame.getContentPane();
chatBoxTxt = new JTextField();
panel.add(chatBoxTxt);
chatBoxTxt.setBounds(5,605,650,30);
chatBoxTxt.setVisible(false);
sendButton = new JButton("Send");
sendButton.addActionListener(this);
panel.add(sendButton);
sendButton.setBounds(260,180,90,30);
modelChatList = new DefaultListModel();
listForChat = new JList(modelChatList);
chatScrollPane = new JScrollPane(listForChat);
panel.add(chatScrollPane);
chatScrollPane.setBounds(5,640,650,80);
modelUserList = new DefaultListModel();
listForUsers = new JList(modelUserList);
userListScrollPane = new JScrollPane(listForUsers);
userListScrollPane.setSize(100,250);
userListScrollPane.setVisible(false);
backpackButton = new JButton(new ImageIcon("images/gui/button_backpack.png"));
backpackButton.addActionListener(this);
backpackButton.setBounds(660,686,33,33);
backpackButton.setBorderPainted(false);backpackButton.setFocusPainted(false);
backpackButton.setToolTipText("Backpack[B]");
panel.add(backpackButton);
characterButton = new JButton(new ImageIcon("images/gui/button_character.png"));
characterButton.addActionListener(this);
characterButton.setBounds(695,686,33,33);
characterButton.setBorderPainted(false);characterButton.setFocusPainted(false);
characterButton.setToolTipText("Character[C]");
panel.add(characterButton);
skillsButton = new JButton(new ImageIcon("images/gui/button_skills.png"));
skillsButton.addActionListener(this);
skillsButton.setBounds(730,686,33,33);
skillsButton.setBorderPainted(false);skillsButton.setFocusPainted(false);
skillsButton.setToolTipText("Skills[V]");
panel.add(skillsButton);
questsButton = new JButton(new ImageIcon("images/gui/button_quests.png"));
questsButton.addActionListener(this);
questsButton.setBounds(765,686,33,33);
questsButton.setBorderPainted(false);questsButton.setFocusPainted(false);
questsButton.setToolTipText("Quests[N]");
panel.add(questsButton);
onlineButton = new JButton(new ImageIcon("images/gui/button_online.png"));
onlineButton.addActionListener(this);
onlineButton.setBounds(800,686,33,33);
onlineButton.setBorderPainted(false);onlineButton.setFocusPainted(false);
onlineButton.setToolTipText("Online List[U]");
panel.add(onlineButton);
helpButton = new JButton(new ImageIcon("images/gui/button_help.png"));
helpButton.addActionListener(this);
helpButton.setBounds(835,686,33,33);
helpButton.setBorderPainted(false);helpButton.setFocusPainted(false);
helpButton.setToolTipText("Help[I]");
panel.add(helpButton);
optionsButton = new JButton(new ImageIcon("images/gui/button_options.png"));
optionsButton.addActionListener(this);
optionsButton.setBounds(870,686,33,33);
optionsButton.setBorderPainted(false);optionsButton.setFocusPainted(false);
optionsButton.setToolTipText("Options[O]");
panel.add(optionsButton);
exitButton = new JButton(new ImageIcon("images/gui/button_exit.png"));
exitButton.addActionListener(this);
exitButton.setBounds(905,686,33,33);
exitButton.setBorderPainted(false);exitButton.setFocusPainted(false);
exitButton.setToolTipText("Exit[none]");
panel.add(exitButton);
skillsFrame = new JInternalFrame("Skills", true, true, false, false);
skillsFrame.setBounds(600, 10, 400, 500);
skillsFrame.setVisible(false);
panel.add(skillsFrame);
onlineFrame = new JInternalFrame("Users", true, true, false, false);
onlineFrame.setContentPane(userListScrollPane);
onlineFrame.setBounds(850, 10, 150, 300);
onlineFrame.setVisible(false);
panel.add(onlineFrame);
panel.setLayout(null);
panel.setFocusable(true);
panel.requestFocus();
panel.addKeyListener(this);//TODO:fix me please, this is not working
frame.setSize(1024, 768);
frame.setVisible(true);
frame.setFocusable(false);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
public void actionPerformed(ActionEvent e){
// sending the messages
if(e.getSource() == sendButton && chatBoxTxt.isVisible() == false){
chatBoxTxt.setVisible(true);
chatBoxTxt.requestFocus(true);
} else if (e.getSource() == sendButton && chatBoxTxt.isVisible() == true){
String str = "";
str = chatBoxTxt.getText();
if (str != ""){
str = name + ": > " + str;
try{
messageOut.writeUTF(str);
System.out.println(str);
messageOut.flush();
}catch(IOException ae)
{System.out.println(ae);}
}
//and hide chatBoxTxt
chatBoxTxt.setText("");
chatBoxTxt.setVisible(false);
}
// show user list
if (e.getSource() == onlineButton){
if (userListScrollPane.isVisible()){
userListScrollPane.setVisible(false);
} else {
userListScrollPane.setVisible(true);
}
if (onlineFrame.isVisible()){
onlineFrame.setVisible(false);
} else {
onlineFrame.setVisible(true);
}
}
// show skill list
if (e.getSource() == skillsButton){
if (skillsFrame.isVisible()){
skillsFrame.setVisible(false);
} else {
skillsFrame.setVisible(true);
}
}
// client logout
if (e.getSource() == exitButton){
int exit = JOptionPane.showConfirmDialog(this, "Are you sure you want to exit?");
if (exit == JOptionPane.YES_OPTION){
frame.dispose();
try{
//sending the message for logout
messageOut.writeUTF(name + " has logged out.");
userLogOut.writeUTF(name);
userLogOut.flush();
Thread.currentThread().sleep(1000);
System.exit(1);
}catch(Exception oe){}
}
}
}
public void windowClosing(WindowEvent w){
try{
userLogOut.writeUTF(name + " has logged out.");
userLogOut.flush();
Thread.currentThread().sleep(1000);
System.exit(1);
}catch(Exception oe){}
}
@Override
public void keyPressed(KeyEvent e) {
int id = e.getID();
//open up chatBoxTxt for typing
if (id == KeyEvent.VK_ENTER && !chatBoxTxt.isVisible()){
chatBoxTxt.setVisible(true);
chatBoxTxt.requestFocus(true);
} //it is open so want to send text
else if (id == KeyEvent.VK_ENTER && chatBoxTxt.isVisible()) {
//send message
String str = "";
str = chatBoxTxt.getText();
//make sure there is a message
if (str.length() > 0){
chatBoxTxt.setText("");
str = name + ": > " + str;
try{
messageOut.writeUTF(str);
System.out.println(str);
messageOut.flush();
}catch(IOException ae)
{System.out.println(ae);}
}
//and hide chatBoxTxt
chatBoxTxt.setVisible(false);
} //press (Map) key without chatBoxTxt being open
else if (id == KeyEvent.VK_M && !chatBoxTxt.isVisible()){
} //press (Character) key without chatBoxTxt being open
else if (id == KeyEvent.VK_C && !chatBoxTxt.isVisible()){
} //press (Backpack) key without chatBoxTxt being open
else if (id == KeyEvent.VK_B && !chatBoxTxt.isVisible()){
}
}
@Override
public void keyReleased(KeyEvent arg0) {
// TODO Auto-generated method stub
}
@Override
public void keyTyped(KeyEvent arg0) {
// TODO Auto-generated method stub
}
// class is used to maintain the list of user name
class MyUserNameReciever implements Runnable{
DataOutputStream userNameOut;
DefaultListModel modelUserList;
DataInputStream userNameIn;
String name, lname;
ArrayList alname = new ArrayList(); //stores the list of user names
ObjectInputStream obj; // read the list of user names
int i = 0;
MyUserNameReciever(DataOutputStream userNameOut, DefaultListModel modelUserList, String name, DataInputStream userNameIn){
this.userNameOut = userNameOut;
this.modelUserList = modelUserList;
this.name = name;
this.userNameIn = userNameIn;
}
public void run(){
try{
userNameOut.writeUTF(name); // write the user name in output stream
while(true){
obj = new ObjectInputStream(userNameIn);
//read the list of user names
alname = (ArrayList)obj.readObject();
if(i>0)
modelUserList.clear();
Iterator i1 = alname.iterator();
System.out.println(alname);
while(i1.hasNext()){
lname = (String)i1.next();
i++;
//add the user names in list box
modelUserList.addElement(lname);
}
}
}catch(Exception oe){}
}
}
//class is used to received the messages
class MyMessageReciever implements Runnable{
DataInputStream messageIn;
DefaultListModel modelChatList;
MyMessageReciever(DataInputStream messageIn, DefaultListModel modelChatList){
this.messageIn = messageIn;
this.modelChatList = modelChatList;
}
public void run(){
String incommingMessage = "";
while(true){
try{
incommingMessage = messageIn.readUTF(); // receive the message from server
// add the message in list box
modelChatList.addElement(incommingMessage);
/* forces chat to bottom of screen :TODO but doesn't allow scrolling up
chatScrollPane.getVerticalScrollBar().addAdjustmentListener(new AdjustmentListener() {
public void adjustmentValueChanged(AdjustmentEvent e) {
e.getAdjustable().setValue(e.getAdjustable().getMaximum());
}});*/
}catch(Exception e){}
}
}
}
}
答案 0 :(得分：4)
并且无法在线找到任何教程我更加困惑。
该链接是一个教程。除非你问一个特定的问题，否则我们不知道你不理解什么。
我的按钮代码很棒
看起来您希望Enter键执行与单击按钮相同的处理。在这种情况下，简单的解决方案是将ActionListener添加到文本字段而不是使用键绑定。你甚至不应该考虑使用KeyListener。
当然，这意味着您需要重新设计程序，以便为每个按钮使用不同的ActionListener。因此，您需要“发送”，“在线”，“技能”和“退出”ActionListeners。然后发送按钮和文本字段都可以使用“发送”ActionListener。
编辑：
例如：用户可以点击（VK_V）或点击技能按钮来显示技能内部框架
您可以使用Key Bindings。您可以按照教程中的说明手动执行绑定。
或者，更简单的解决方案是使用带菜单项的JMenu来调用您的操作。然后，您可以为菜单项设置加速器。有关详细信息，请阅读How to Use Menus上的Swing教程中的部分。
任何进一步的帮助都会要求您发布您的SSCCE，