在swing applet中使用的套接字 [英] Socket using in a swing applet
问题描述
我应该制作一台服务器& Java中的客户端，基于Swing和gui。我需要以某种方式建立一个从服务器到客户端，从客户端到服务器的套接字，并且会传递某种字符串。我希望以后有一个根据套接字中的字符串执行多项操作的函数。
由于某种原因，我找不到一个简单的代码示例，以简单的方式显示它是如何完成的。
任何人都有任何简单的例子或者可以解释它是如何完成的？
基于此
package net;
import java.awt。*;
import java.awt.event。*;
import java.io. *;
import java.net。*;
import java.util.Scanner;
import javax.swing。*;
import javax.swing.text.DefaultCaret;
/ **
*一个简单的网络客户端 - 服务器对
* @http：//stackoverflow.com/questions/3245805
* /
公共类Echo实现ActionListener，Runnable {
private static final String HOST =127.0.0.1;
private static final int PORT = 12345;
private final JFrame f = new JFrame（）;
private final JTextField tf = new JTextField（25）;
私人决赛JTextArea ta = new JTextArea（15,25）;
私人决赛JButton发送=新JButton（发送）;
private volatile PrintWriter out;
私密扫描仪;
private Thread thread;
private kind kind;
public static enum Kind {
Client（100，Trying），Server（500，Awaiting）;
private int offset;
私有字符串活动;
private Kind（int offset，String activity）{
this.offset = offset;
this.activity = activity;
}
}
public Echo（善良种类）{
this.kind = kind;
f.setTitle（Echo+ kind）;
f.setDefaultCloseOperation（JFrame.EXIT_ON_CLOSE）;
f.getRootPane（）。setDefaultButton（send）;
f.add（tf，BorderLayout.NORTH）;
f.add（new JScrollPane（ta），BorderLayout.CENTER）;
f.add（send，BorderLayout.SOUTH）;
f.setLocation（kind.offset，300）;
f.pack（）;
send.addActionListener（this）;
ta.setLineWrap（true）;
ta.setWrapStyleWord（true）;
DefaultCaret caret =（DefaultCaret）ta.getCaret（）;
caret.setUpdatePolicy（DefaultCaret.ALWAYS_UPDATE）;
显示（kind.activity + HOST +on port+ PORT）;
thread = new Thread（this，kind.toString（））;
}
public void start（）{
f.setVisible（true）;
thread.start（）;
}
// @覆盖
public void actionPerformed（ActionEvent ae）{
String s = tf.getText（）;
if（out！= null）{
out.println（s）;
}
display（s）;
tf.setText（）;
}
// @覆盖
public void run（）{
try {
Socket socket;
if（kind == Kind.Client）{
socket = new Socket（HOST，PORT）;
} else {
ServerSocket ss = new ServerSocket（PORT）;
socket = ss.accept（）;
}
in = new Scanner（socket.getInputStream（））;
out = new PrintWriter（socket.getOutputStream（），true）;
显示（已连接）;
while（true）{
display（in.nextLine（））;
}
} catch（例外e）{
display（e.getMessage（））;
e.printStackTrace（System.err）;
}
}
private void display（final String s）{
EventQueue.invokeLater（new Runnable（）{
// @ Override
public void run（）{
ta.append（s +\ u23CE \ n）;
}
}）;
}
public static void main（String [] args）{
EventQueue.invokeLater（new Runnable（）{
// @ Override
public void run（）{
new Echo（Kind.Server）.start（）;
new Echo（Kind.Client）.start（）;
}
}）;
}
}
I should made a server & client in Java,based on Swing and gui.I neeed to make somehow a socket that will go from the server to the client and from the client to the server, and will pass some kind of a string.I would like to have later a function that would do several things according to the string that would be in the socket.
For some reason I couldn't find a simple example for code that shows how it's done in a simple way.
Anyone has any simple example or can explain how is it being done?
Based on this example, here's a simple network client-server pair using Swing. Note some issues related to correct synchronization: The GUI itself is constructed on the event dispatch thread using invokeLater(). In addition, the code relies on the thread safety of append(). Finally, it incorporates a handy tip from the article Text Area Scrolling.
Update: In Java 7, append() is no longer marked as thread safe; invokeLater() is used in display() to sequence updates.
package net;
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.net.*;
import java.util.Scanner;
import javax.swing.*;
import javax.swing.text.DefaultCaret;
/**
* A simple network client-server pair
* @http://stackoverflow.com/questions/3245805
*/
public class Echo implements ActionListener, Runnable {
private static final String HOST = "127.0.0.1";
private static final int PORT = 12345;
private final JFrame f = new JFrame();
private final JTextField tf = new JTextField(25);
private final JTextArea ta = new JTextArea(15, 25);
private final JButton send = new JButton("Send");
private volatile PrintWriter out;
private Scanner in;
private Thread thread;
private Kind kind;
public static enum Kind {
Client(100, "Trying"), Server(500, "Awaiting");
private int offset;
private String activity;
private Kind(int offset, String activity) {
this.offset = offset;
this.activity = activity;
}
}
public Echo(Kind kind) {
this.kind = kind;
f.setTitle("Echo " + kind);
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.getRootPane().setDefaultButton(send);
f.add(tf, BorderLayout.NORTH);
f.add(new JScrollPane(ta), BorderLayout.CENTER);
f.add(send, BorderLayout.SOUTH);
f.setLocation(kind.offset, 300);
f.pack();
send.addActionListener(this);
ta.setLineWrap(true);
ta.setWrapStyleWord(true);
DefaultCaret caret = (DefaultCaret) ta.getCaret();
caret.setUpdatePolicy(DefaultCaret.ALWAYS_UPDATE);
display(kind.activity + HOST + " on port " + PORT);
thread = new Thread(this, kind.toString());
}
public void start() {
f.setVisible(true);
thread.start();
}
//@Override
public void actionPerformed(ActionEvent ae) {
String s = tf.getText();
if (out != null) {
out.println(s);
}
display(s);
tf.setText("");
}
//@Override
public void run() {
try {
Socket socket;
if (kind == Kind.Client) {
socket = new Socket(HOST, PORT);
} else {
ServerSocket ss = new ServerSocket(PORT);
socket = ss.accept();
}
in = new Scanner(socket.getInputStream());
out = new PrintWriter(socket.getOutputStream(), true);
display("Connected");
while (true) {
display(in.nextLine());
}
} catch (Exception e) {
display(e.getMessage());
e.printStackTrace(System.err);
}
}
private void display(final String s) {
EventQueue.invokeLater(new Runnable() {
//@Override
public void run() {
ta.append(s + "\u23CE\n");
}
});
}
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
//@Override
public void run() {
new Echo(Kind.Server).start();
new Echo(Kind.Client).start();
}
});
}
}
这篇关于在swing applet中使用的套接字的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
