如何在Eclipse中连接Java源码
工具/原料
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安装了Eclipse开发工具
电脑中下载有对应源码的zip包或JAR包
1打开我们Eclipse开发工具，点击菜单栏中的“Window”选项，这里有用于设置Eclipse的一些基本操作，如下图：
2点击“Window”弹出的下拉菜单中，我们看到“Preferences”这个选项，然后点击“Preferences”，将会弹出属性设置窗口，如下图：
3弹出“Preferences”属性设置窗口，你会看到窗口左边栏有一列可选项，我们点击“Java”选项，展开下拉选项，然后选中“Installed JREs”，如下图：
4在选中“Installed JREs”后，右边栏中，我们点击已经安装了的JREs，然后点击“Edit”按钮，将会进入编辑JREs窗口界面，如下图：
5
弹窗编辑JRE窗口，窗口中列出JRE在本地安装的路径、JRE名称和JRE里面包含的类库。在类库中，点击展开选项，在选项中看到“Source Attachment”并选中选项，然后点击“Source Attachment”，如下图：
6点击“Source Attachment”按钮后弹窗的窗口，是需要设置关联Java源代码的窗口，选中“External location”，然后选择本地种Zip包或JAR包文件，最后点击“OK”即可
请问能不能帮我写一个Java的聊天窗口文件源代码，不要很复杂，只要能运行，聊天就行了！我用淘宝金币换,谢
话说网上真的好多啊...
package client;
import java.awt.Color;
import java.awt.Container;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.net.Socket;
import java.util.Date;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;
public class ClientFrame extends JFrame{
private JTextArea allmsg;
private JTextField welcome,copyright,chatmsg;
private JButton send;
private JScrollPane js;
private boolean isConnected = true;
public DataOutputStream out;
public DataInputStream in;
public Socket s = null;
String nic; /* -- 保存用户昵称 --*/
/**
* 初始化客户端资源
* 1.获取从LoginFrame传递过来的参数
* 2.初始化界面元素
* 3.初始化通信所需要的资源 EG：输入/输出流(DataInputStream/DataOutputStream)
* */
public ClientFrame(String name,Socket socket)
{
this.setSize(310,660);
this.setLocation(290,50);
this.setTitle("聊天室客户端"+name+"");/* -- 指定窗口的标题 --*/
this.s = socket;/* -- 接收从LoginFrame中传递过来的Socket --*/
this.nic = name+" 说： ";
welcome = new JTextField(" "+name+" 欢迎您来到聊天室 ",100);
welcome.setBackground(Color.blue);
welcome.setEnabled(false);
copyright = new JTextField(" ----- all copyright @ TOP-king -----");
copyright.setEnabled(false);
allmsg = new JTextArea();
allmsg.setEditable(false);
allmsg.append(" 系统消息: 欢迎登录在线聊天室 \n");
js = new JScrollPane(allmsg);//为JTextArea添加滚动条
chatmsg = new JTextField("在此输入聊天信息");
chatmsg.addActionListener(new listen());
send = new JButton("发送");
send.addActionListener(new listen());/* -- 添加事件监听器 --*/
try {
out = new DataOutputStream(s.getOutputStream());
in = new DataInputStream(s.getInputStream());
} catch (IOException e) {JOptionPane.showMessageDialog(null, "系统异常","错误",JOptionPane.OK_CANCEL_OPTION);}
addcomponettocontainer();
/* -- 当用户关闭窗口时进行相关的处理 eg:Socket Data(Input/Output)Stream 的关闭--*/
this.addWindowListener(new WindowAdapter(){
public void windowClosing(WindowEvent we)
{
sendmsg("quitlogout");/* -- 向服务器端发送关闭信息 --*/
isConnected = false;
destory();/* -- 销毁窗口资源 --*/
}
});
new Thread(new linread()).start();/* -- 启动读取信息线程 --*/
}
public void addcomponettocontainer()
{
Container c = this.getContentPane();
c.setLayout(null);
welcome.setBounds(75,10,150,20);
js.setBounds(10,50,280,500);
chatmsg.setBounds(10,560,180,30);
send.setBounds(220,560,70,30);
copyright.setBounds(10,600,280,20);
c.add(welcome);
c.add(js);
c.add(chatmsg);
c.add(send);
c.add(copyright);
this.setVisible(true);
this.setResizable(false);
}
class listen implements ActionListener
{
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
if(e.getSource()==send||e.getSource()==chatmsg)
{
String msg = chatmsg.getText().trim();
if("".equals(msg))
{
JOptionPane.showMessageDialog(null,"发送信息不能为空!","错误",JOptionPane.OK_OPTION);
}
else
{sendmsg((new Date()).toLocaleString()+"\n"+nic+msg+"\n");chatmsg.setText("");}
}
}
}
/* -- 向服务器端发送信息 --*/
public void sendmsg(String m)
{
if(isConnected)//如果socket的输出流没关闭
{
try {
out.writeUTF(m);
} catch (IOException e) {
JOptionPane.showMessageDialog(null,"发送信息失败!(系统异常)","错误",JOptionPane.OK_OPTION);
}
}
else
{
JOptionPane.showMessageDialog(null,"发送信息失败!(服务器关闭/网络故障)","错误",JOptionPane.OK_OPTION);
}
}
/* -- 读取信息线程 --*/
class linread implements Runnable
{
public void run()
{
read();
}
public void read()
{
while(isConnected)
{
try {
String msg = in.readUTF();
if("SYSTEM_CLOSED".equals(msg))
{
JOptionPane.showMessageDialog(null,"读取消息失败(服务器关闭/网络故障)！","错误",JOptionPane.OK_OPTION);
isConnected = false;
}
else
allmsg.append(msg+"\n");
} catch (IOException e) {
}
}//end while
JOptionPane.showMessageDialog(null,"读取消息失败(服务器关闭/网络故障)！","错误",JOptionPane.OK_OPTION);
}//end read()
}
public void destory()
{
try {
this.out.close();
this.in.close();
this.s.close();
} catch (IOException e) {
}
this.dispose();
}
}
======================================================
package client;
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import java.io.*;
import java.net.*;
public class LoginFrame extends JFrame{
private JTextField name;
private JTextField ip;
private JButton ok,cancle;
public Socket socket;
public LoginFrame()
{
super("登录框");
this.setSize(400,80);
this.setLocation(100,100);
name = new JTextField("昵称");
ip = new JTextField("127.0.0.1");
ok = new JButton("登录");
cancle = new JButton("取消");
ok.addActionListener(new listenEvent());
cancle.addActionListener(new listenEvent());
//建立容器
addcomponettocontainer();
this.setDefaultCloseOperation(EXIT_ON_CLOSE);
}
/**
* 建立容器及控件
*/
public void addcomponettocontainer()
{
Container c = this.getContentPane();
c.setLayout(null);
name.setBounds(10,10,100,30);
ip.setBounds(120,10,100,30);
ok.setBounds(230,10,70,30);
cancle.setBounds(310,10,70,30);
c.add(name);
c.add(ip);
c.add(ok);
c.add(cancle);
this.setVisible(true);
this.setResizable(false);
}
public class listenEvent implements ActionListener
{
public void actionPerformed(ActionEvent event) {
// TODO Auto-generated method stub
if(event.getSource()==ok)
{
String n = name.getText().trim();
String i = ip.getText().trim();
if("".equals(n)||"".equals(i))
{
JOptionPane.showMessageDialog(null,"昵称、IP不能够为空!","错误",JOptionPane.OK_OPTION);
}
else{login(n,i);}
}
if(event.getSource()==cancle)
{
name.setText("");
ip.setText("");
}
}
}
/**
* 进行登录
* @param name
* @param ip
*/
public void login(String name,String ip)
{
try {
socket = new Socket(ip,7777);
DataOutputStream out = new DataOutputStream(socket.getOutputStream());
out.writeUTF(name);
out.flush();//强制输出缓存中的内容
//out.close();
new ClientFrame(name,socket);
destroywindow();
} catch (UnknownHostException e) {
JOptionPane.showMessageDialog(null,"找不到主机地址(IP错误/网络故障)！","错误",JOptionPane.OK_OPTION);
} catch (IOException e) {
}
}
public void destroywindow()
{
this.dispose();
}
public static void main(String[] args)
{
new LoginFrame();
}
}
==================================================
package server;
import java.awt.Container;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.ArrayList;
import java.util.Date;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;
public class ServerFrame extends JFrame{
/**
*
*/
private static final long serialVersionUID = 1L;
private JTextArea allmsg;
private JTextField currnum,totalnum,copyright,chatmsg;
private JButton send;
private JScrollPane js;
int num1,num2,port;/* -- num1:当前在线人数 num2:总上线人数 port:服务端口号 --*/
private ServerSocket ss;
ArrayListuser lists;//存放所有在线用户
public ServerFrame()
{
super("聊天室服务器端");
this.setSize(310,660);
this.setLocation(200,50);
lists = new ArrayListuser();
num1 = num2 =0;
port = 7777;
currnum = new JTextField(" 当前在线人数： "+num1);
currnum.setEnabled(false);
totalnum = new JTextField(" 上线总人数： "+num2);
totalnum.setEnabled(false);
copyright = new JTextField(" ----- all copyright @ TOP-king -----");
copyright.setEnabled(false);
allmsg = new JTextArea();
allmsg.append(" --------------- 系统消息 --------------\n");
allmsg.setEditable(false);
allmsg.setLineWrap(true); //允许自动换行
js = new JScrollPane(allmsg);//为JTextArea添加滚动条
chatmsg = new JTextField("在此输入系统信息");
chatmsg.addActionListener(new ActionListener(){
@SuppressWarnings("deprecation")
public void actionPerformed(ActionEvent arg0) {
String str = chatmsg.getText().trim();
if(!"".equals(str))
{sendmsg((new Date()).toLocaleString()+" -- 系统消息： "+str);chatmsg.setText("");}
else
JOptionPane.showMessageDialog(null, "消息不能为空","错误",JOptionPane.OK_OPTION);
chatmsg.setText("");/* -- 发送信息后，将输入栏中的信息清空 -- */
}
});
send = new JButton("发送");
send.addActionListener(new ActionListener(){
@SuppressWarnings("deprecation")
public void actionPerformed(ActionEvent arg0) {
String str = chatmsg.getText().trim();
if(!"".equals(str))
{sendmsg((new Date()).toLocaleString()+" -- 系统消息： "+str);chatmsg.setText("");}
else
JOptionPane.showMessageDialog(null, "消息不能为空","错误",JOptionPane.OK_OPTION);
chatmsg.setText("");/* -- 发送信息后，将输入栏中的信息清空 -- */
}
});
//建立容器
addcomponettocontainer();
this.addWindowListener(new WindowAdapter(){
public void windowClosing(WindowEvent we)
{
sendmsg("SYSTEM_CLOSED");/* -- 向客户端发送服务器关闭信息 -- */
destory();
}
});
start(); /* -- 启动连接服务 -- */
}
public void addcomponettocontainer()
{
//Container建立容器
Container c = this.getContentPane();
c.setLayout(null);
currnum.setBounds(20,15,130,20);
totalnum.setBounds(155,15,125,20);
js.setBounds(10,50,280,500);
chatmsg.setBounds(10,560,180,30);
send.setBounds(220,560,70,30);
copyright.setBounds(10,600,280,20);
c.add(currnum);
c.add(totalnum);
c.add(js);
c.add(chatmsg);
c.add(send);
c.add(copyright);
this.setVisible(true);
this.setResizable(false);
}
/**
* start()方法监听客户的连接
* 并且保存客户端的相关信息EG：用户昵称、用户所使用的Socket
* 用户连接到服务器成功之后，将其保存到用户列表中，并为该用户启动一个线程用于通信 */
@SuppressWarnings("deprecation")
public void start()
{
boolean isStarted = false;/* -- 用于标记服务器是否已经正常启动 -- */
try {
this.ss = new ServerSocket(port);
isStarted = true;
this.allmsg.append((new Date()).toLocaleString()+" 服务器启动 @ 端口: "+port+"\n");
while(isStarted)
{
Socket client = this.ss.accept(); /* -- 监听客户端的连接 -- */
DataInputStream in = new DataInputStream(client.getInputStream());
String name = in.readUTF();
user u = new user();
u.name = name;
u.socket = client;
lists.add(u); //将该用户加到列表中去
num1++;
num2++;
currnum.setText(" 当前在线人数： "+num1);
totalnum.setText(" 上线总人数： "+num2);
this.allmsg.append((new Date()).toLocaleString()+" : "+u.name+" 登录 \n");
new Thread(new ClientThread(u)).start();/* -- 为该用户启动一个通信线程 -- */
}
} catch (IOException e) {
System.out.println("服务器已经启动......");
System.exit(0);
}
}
/**
* 通信线程主要功能包括：
* 1.监听客户端输入的信息
* 2.将接收到的信息转发给其他用户 */
class ClientThread implements Runnable
{
user user = null;
boolean isConnected = true;
DataInputStream dis = null;
DataOutputStream dos = null;
public ClientThread(user u)
{
this.user = u;
try {
this.dis = new DataInputStream(this.user.socket.getInputStream());
this.dos = new DataOutputStream(this.user.socket.getOutputStream());
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public void run()
{
readmsg();
}
/* -- 读取客户的聊天信息 -- */
@SuppressWarnings("deprecation")
public void readmsg()
{
while(isConnected)
{
try {
String msg = dis.readUTF();
if("quitlogout".equals(msg))//当用户关闭客户端窗口时，发送quit字符串 表示用户已经退出
{
num1--;
try{
this.dis.close();
this.dos.close();
this.user.socket.close();
this.isConnected = false;
}catch(IOException ioe)
{
ioe.printStackTrace();
}finally{
this.isConnected = false;
if(dis!=null) this.dis.close();
if(dos!=null) this.dos.close();
if(this.user.socket!=null) this.user.socket.close();
}
lists.remove(this.user);//从列表中删除该用户
currnum.setText(" 当前在线人数： "+num1);
allmsg.append((new Date()).toLocaleString()+" : "+this.user.name+" 退出\n");
}
else
sendmsg(msg);
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
/* -- 将信息进行转发 -- */
public void sendmsg(String msg)
{
user us = new user();
DataOutputStream os = null;
if(lists.size()0)
{
for(int i=0;ilists.size();i++)
{
us = lists.get(i);
try {
os = new DataOutputStream(us.socket.getOutputStream());
os.writeUTF(msg);
} catch (IOException e) {
e.printStackTrace();
}
}
}
else
JOptionPane.showMessageDialog(null, "当前无用户在线。发送消息失败","失败",JOptionPane.OK_OPTION);
}
public void destory()
{
try {
this.ss.close();
} catch (IOException e) {
e.printStackTrace();
}
this.dispose();
}
public static void main(String[] args)
{
new ServerFrame();
}
}
=================================================
package server;
import java.net.*;
public class user {
String name;
Socket socket;
}
在Eclipse中，怎么查看某个类的源代码
1、首先打开eclipse，建立项目：Test，将struts2相关jar包导入到其中。在Package Explorer标签栏下操作。
2、这里查阅struts2中，struts2-core-2.3.12.jar下的源代码。在Test项目下，找到 Web App Libraries -- struts2-core-2.3.12.jar，右键单击struts2-core-2.3.12.jar，选择"Properties" 。
3、在新弹出的对话框中，选择Java Source Attachment -- External location -- External Floder...。
4、此时，又有新的对话框弹出。找到步骤1中提到的struts2-core-2.3.12.jar的源代码在硬盘中的位置，然后单击“确定”，回到上对话框，确定信息无误后，点击“OK”
5、此时，源代码就成功和Eclipse建立连接了。
求windows时间和日期属性对话框java源代码
import java.awt.*;
import java.awt.event.*;
import java.util.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.table.*;
public class MyCalendar extends JApplet {
public static final String WEEK_SUN = "SUN";
public static final String WEEK_MON = "MON";
public static final String WEEK_TUE = "TUE";
public static final String WEEK_WED = "WED";
public static final String WEEK_THU = "THU";
public static final String WEEK_FRI = "FRI";
public static final String WEEK_SAT = "SAT";
public static final Color background = Color.white;
public static final Color foreground = Color.black;
public static final Color headerBackground = Color.blue;
public static final Color headerForeground = Color.white;
public static final Color selectedBackground = Color.blue;
public static final Color selectedForeground = Color.white;
private JPanel cPane;
private JLabel yearsLabel;
private JSpinner yearsSpinner;
private JLabel monthsLabel;
private JComboBox monthsComboBox;
private JTable daysTable;
private AbstractTableModel daysModel;
private Calendar calendar;
public MyCalendar() {
cPane = (JPanel) getContentPane();
}
public void init() {
cPane.setLayout(new BorderLayout());
calendar = Calendar.getInstance();
calendar = Calendar.getInstance();
yearsLabel = new JLabel("Year: ");
yearsSpinner = new JSpinner();
yearsSpinner.setEditor(new JSpinner.NumberEditor(yearsSpinner, "0000"));
yearsSpinner.setValue(new Integer(calendar.get(Calendar.YEAR)));
yearsSpinner.addChangeListener(new ChangeListener() {
public void stateChanged(ChangeEvent changeEvent) {
int day = calendar.get(Calendar.DAY_OF_MONTH);
calendar.set(Calendar.DAY_OF_MONTH, 1);
calendar.set(Calendar.YEAR, ((Integer) yearsSpinner.getValue()).intValue());
int maxDay = calendar.getActualMaximum(Calendar.DAY_OF_MONTH);
calendar.set(Calendar.DAY_OF_MONTH, day maxDay ? maxDay : day);
updateView();
}
});
JPanel yearMonthPanel = new JPanel();
cPane.add(yearMonthPanel, BorderLayout.NORTH);
yearMonthPanel.setLayout(new BorderLayout());
yearMonthPanel.add(new JPanel(), BorderLayout.CENTER);
JPanel yearPanel = new JPanel();
yearMonthPanel.add(yearPanel, BorderLayout.WEST);
yearPanel.setLayout(new BorderLayout());
yearPanel.add(yearsLabel, BorderLayout.WEST);
yearPanel.add(yearsSpinner, BorderLayout.CENTER);
monthsLabel = new JLabel("Month: ");
monthsComboBox = new JComboBox();
for (int i = 1; i = 12; i++) {
monthsComboBox.addItem(new Integer(i));
}
monthsComboBox.setSelectedIndex(calendar.get(Calendar.MONTH));
monthsComboBox.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent actionEvent) {
int day = calendar.get(Calendar.DAY_OF_MONTH);
calendar.set(Calendar.DAY_OF_MONTH, 1);
calendar.set(Calendar.MONTH, monthsComboBox.getSelectedIndex());
int maxDay = calendar.getActualMaximum(Calendar.DAY_OF_MONTH);
calendar.set(Calendar.DAY_OF_MONTH, day maxDay ? maxDay : day);
updateView();
}
});
JPanel monthPanel = new JPanel();
yearMonthPanel.add(monthPanel, BorderLayout.EAST);
monthPanel.setLayout(new BorderLayout());
monthPanel.add(monthsLabel, BorderLayout.WEST);
monthPanel.add(monthsComboBox, BorderLayout.CENTER);
daysModel = new AbstractTableModel() {
public int getRowCount() {
return 7;
}
public int getColumnCount() {
return 7;
}
public Object getValueAt(int row, int column) {
if (row == 0) {
return getHeader(column);
}
row--;
Calendar calendar = (Calendar) MyCalendar.this.calendar.clone();
calendar.set(Calendar.DAY_OF_MONTH, 1);
int dayCount = calendar.getActualMaximum(Calendar.DAY_OF_MONTH);
int moreDayCount = calendar.get(Calendar.DAY_OF_WEEK) - 1;
int index = row * 7 + column;
int dayIndex = index - moreDayCount + 1;
if (index moreDayCount || dayIndex dayCount) {
return null;
} else {
return new Integer(dayIndex);
}
}
};
daysTable = new CalendarTable(daysModel, calendar);
daysTable.setCellSelectionEnabled(true);
daysTable.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
daysTable.setDefaultRenderer(daysTable.getColumnClass(0), new TableCellRenderer() {
public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected,
boolean hasFocus, int row, int column) {
String text = (value == null) ? "" : value.toString();
JLabel cell = new JLabel(text);
cell.setOpaque(true);
if (row == 0) {
cell.setForeground(headerForeground);
cell.setBackground(headerBackground);
} else {
if (isSelected) {
cell.setForeground(selectedForeground);
cell.setBackground(selectedBackground);
} else {
cell.setForeground(foreground);
cell.setBackground(background);
}
}
return cell;
}
});
updateView();
cPane.add(daysTable, BorderLayout.CENTER);
}
public static String getHeader(int index) {
switch (index) {
case 0:
return WEEK_SUN;
case 1:
return WEEK_MON;
case 2:
return WEEK_TUE;
case 3:
return WEEK_WED;
case 4:
return WEEK_THU;
case 5:
return WEEK_FRI;
case 6:
return WEEK_SAT;
default:
return null;
}
}
public void updateView() {
daysModel.fireTableDataChanged();
daysTable.setRowSelectionInterval(calendar.get(Calendar.WEEK_OF_MONTH),
calendar.get(Calendar.WEEK_OF_MONTH));
daysTable.setColumnSelectionInterval(calendar.get(Calendar.DAY_OF_WEEK) - 1,
calendar.get(Calendar.DAY_OF_WEEK) - 1);
}
public static class CalendarTable extends JTable {
private Calendar calendar;
public CalendarTable(TableModel model, Calendar calendar) {
super(model);
this.calendar = calendar;
}
public void changeSelection(int row, int column, boolean toggle, boolean extend) {
super.changeSelection(row, column, toggle, extend);
if (row == 0) {
return;
}
Object obj = getValueAt(row, column);
if (obj != null) {
calendar.set(Calendar.DAY_OF_MONTH, ((Integer)obj).intValue());
}
}
}
public static void main(String[] args) {
JFrame frame = new JFrame("Calendar Application");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
MyCalendar myCalendar = new MyCalendar();
myCalendar.init();
frame.getContentPane().add(myCalendar);
frame.setSize(240, 172);
frame.show();
}
}
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