Question

MyEclipse 如何用java 开发C/S程序，最好给个简单的例子 先谢谢了

Answer 1

package com.java.MyNotepad;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import javax.swing.JComboBox;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JOptionPane;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.filechooser.FileNameExtensionFilter;
import com.java.find.FindString;
public class MyNotepad {
    private JFrame f;
    public static JTextArea ta;
    private JMenuBar mb;
    private JMenu fileMenu, edit, FColor, help;
    private JMenuItem mOpenFile, mSave, mExit, mFind, fRed, fGreen, fBlack,
            fGray, fBlue, mAbout;
    private String[] fontTypeStr = { "宋体", "华文行楷", "隶书", "华文彩云", "华文新魏",
            "华文琥珀", "幼圆", "楷书" };
    private String fontStyleStr[] = { "常规", "倾斜", "粗体", "倾斜+粗体" };
    private String fontSizeStr[] = { "13", "15", "20", "30", "40", "50", "60",
            "70", "80", "100", "120", "150", "200", "300", "400", "500", "700",
            "1000", "1500", "2000", "4000" };
    private JComboBox fontt = new JComboBox(fontTypeStr);
    private JComboBox fontStyle = new JComboBox(fontStyleStr);
    private JComboBox fontSize = new JComboBox(fontSizeStr);
    // 文件对话框
    private JFileChooser Chooser;
    private File file;
    private int flag;
    private BufferedReader br;
    private BufferedWriter bw;
    private FileNameExtensionFilter filter;
    private int fileNum = 1;
    private FindString fs;
    public void initialized() {
        f = new JFrame("MyNotepad");
        // 多行文本框
        ta = new JTextArea();
        ta.addKeyListener(new Process());
        // 滚动条
        JScrollPane jsp = new JScrollPane(ta);
        // 元素
        fontt.addItemListener(new Process());
        fontStyle.addItemListener(new Process());
        fontSize.addItemListener(new Process());
        mOpenFile = new JMenuItem("Open");
        mOpenFile.addActionListener(new Process());
        mSave = new JMenuItem("Save to...");
        mSave.addActionListener(new Process());
        mExit = new JMenuItem("Exit");
        mExit.addActionListener(new Process());
        mFind = new JMenuItem("Find");
        mFind.addActionListener(new Process());
        fRed = new JMenuItem("Red");
        fRed.addActionListener(new Process());
        fGreen = new JMenuItem("Green");
        fGreen.addActionListener(new Process());
        fBlack = new JMenuItem("Black");
        fBlack.addActionListener(new Process());
        fGray = new JMenuItem("Gray");
        fGray.addActionListener(new Process());
        fBlue = new JMenuItem("Blue");
        fBlue.addActionListener(new Process());
        mAbout = new JMenuItem("About");
        mAbout.addActionListener(new Process());
        // 菜单列表元素
        fileMenu = new JMenu("File");
        edit = new JMenu("Edit");
        FColor = new JMenu("Font Color");
        help = new JMenu("Help");
        // 菜单
        mb = new JMenuBar();
        // 添加组件
        fileMenu.add(mOpenFile);
        fileMenu.add(mSave);
        fileMenu.add(mExit);
        fileMenu.setForeground(Color.WHITE);
        edit.add(mFind);
        edit.setForeground(Color.WHITE);
        help.add(mAbout);
        help.setForeground(Color.WHITE);
        FColor.add(fRed);
        FColor.add(fGreen);
        FColor.add(fBlack);
        FColor.add(fGray);
        FColor.add(fBlue);
        FColor.setForeground(Color.WHITE);
        mb.add(fileMenu);
        mb.add(edit);
        mb.add(FColor);
        mb.add(help);
        mb.add(fontt);
        mb.add(fontStyle);
        mb.add(fontSize);
        mb.setBackground(Color.gray);
        ta.setBackground(Color.LIGHT_GRAY);
        ta.setForeground(Color.black);
        f.add(mb, BorderLayout.NORTH);
        f.add(jsp, BorderLayout.CENTER);
        f.setLocation(400, 200);
        f.setSize(800, 450);
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.setVisible(true);
    }
}

这是写记事本中的界面代码，功能代码没有贴上来，要不你看着感觉复杂了。。。如果要源码可以留邮箱，运行这段代码直接写个main函数实例化一个该类对象，调用initialized方法

追问

1113441497@qq.com 谢谢 只要有一个功能就行 我看网上用MyEclipse 开发C/S程序 需要下载插件？要用到哪些重要的包类？

追答

网上说的插件应该是用于快速开发的，所有的组件都是自动生成，用鼠标托放的，代码自动生成，在大多数情况下会生成一部分垃圾代码，我这里所有的组件都是用手动new出来的，在开发C/S程序时，JAVA并不需要下载其它的什么包类，在JDK中自己存在所有的组件类。好了，程序已发送。

Answer 2

server.java
public class Server extends JFrame{
private JTextArea jta=new JTextArea();
public static void main(String[]args){
new Server();
}
public Server()
{
setLayout(new BorderLayout());
add(new JScrollPane(jta),BorderLayout.CENTER);

setTitle("Server");
setSize(500,300);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setVisible(true);
try
{
ServerSocket serverSocket=new ServerSocket(8000);
jta.append("Server started at"+new Date()+'\n');
Socket socket=serverSocket.accept();
DataInputStream inputFromClient=new DataInputStream(socket.getInputStream());
DataOutputStream outputToClient=new DataOutputStream(socket.getOutputStream());
while(true)
{
double radius=inputFromClient.readDouble();
double area=radius*radius*Math.PI;
outputToClient.writeDouble(area);
jta.append("Radius received from client"+radius+'\n');
jta.append("Area found:"+area+'\n');
}

}
catch(Exception e)
{
System.out.println(e);
}
}

}
client.java
import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.net.Socket;

import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;

public class Client extends JFrame{
private JTextField jtf=new JTextField();
private JTextArea jta=new JTextArea();
private DataOutputStream toServer;
private DataInputStream fromServer;
public static void main(String[]args){
new Client();

}
public Client()
{
JPanel p=new JPanel();
p.setLayout(new BorderLayout());
p.add(new JLabel("Enter radius"),BorderLayout.WEST);
p.add(jtf,BorderLayout.CENTER);
jtf.setHorizontalAlignment(JTextField.RIGHT);
setLayout(new BorderLayout());
add(p,BorderLayout.NORTH);
add(new JScrollPane(jta),BorderLayout.CENTER);
jtf.addActionListener(new ButtonListener());
setTitle("Client");
setSize(500,300);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setVisible(true);
try
{
Socket socket=new Socket("localhost",8000);
fromServer=new DataInputStream(socket.getInputStream());
toServer=new DataOutputStream(socket.getOutputStream());
}
catch(Exception e)
{
e.printStackTrace();
}
}
private class ButtonListener implements ActionListener
{

@Override
public void actionPerformed(ActionEvent e) {
try
{
double radius=Double.parseDouble(jtf.getText().trim());
toServer.writeDouble(radius);
toServer.flush();
double area=fromServer.readDouble();
jta.append("Radius is"+radius+"\n");
jta.append("Area received from the server is"+area+'\n');
}
catch(Exception ex)
{
System.out.println(ex);
}

}

}

}

追问

您好 我想问下 这个出来时什么效果的？我现在没法测试，希望您能给我发个截图