跪求一个Java编写的多人聊天程序源代码
import java.io.InputStream;
import java.io.DataInputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.DataOutputStream;
import java.io.BufferedReader;
import java.net.ServerSocket;
import java.net.Socket;
import java.io.IOException;
import java.util.Date;
class Server
{
public Server()
{
try
{
ServerSocket s=new ServerSocket();
Socket ss=s.accept();
OutputStream out=ss.getOutputStream();
DataOutputStream dout=new DataOutputStream(out);
InputStream in=ss.getInputStream();
DataInputStream din=new DataInputStream(in);
System.out.print(din.readUTF()+"!");
dout.writeUTF("你已经连接到服务器"+"\t"+"你的地址:"+ss.getInetAddress()+"\t"
+"你的链接端口:"+ss.getLocalPort()+"\n");
new ReadMessage(din).start();
new SendMessage(dout).start();
}
catch (IOException e)
{
e.printStackTrace();
}
}
public static void main(String[] args)
{
new Server();
}
}
//接受客户端信息
class ReadMessage extends Thread
{
private DataInputStream din;
public ReadMessage(DataInputStream din)
{
this.din=din;
}
public void run()
{
String str;
try
{
while (true)
{
str=din.readUTF();
System.out.println(new Date().toLocaleString()+"客户端说:"+str);
if (str.equals("bye"))
{
System.out.println("客户端下线!");
break;
}
}
}
catch (IOException e)
{
e.printStackTrace();
}
}
}
// 发出服务器信息
class SendMessage extends Thread
{
private DataOutputStream dout;
public SendMessage(DataOutputStream dout)
{
this.dout=dout;
}
public void run()
{
InputStreamReader inr=new InputStreamReader(System.in);
BufferedReader buf=new BufferedReader(inr);
String str;
try
{
while(true)
{
str=buf.readLine();
dout.writeUTF(str);
if (str.equals("bye"))
{
System.out.println("服务器退出!系列");
System.exit(1);
}
}
}
catch (IOException e)
{
e.printStackTrace();
}
}
}
import java.io.InputStream;
import java.io.DataInputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.DataOutputStream;
import java.io.BufferedReader;
import java.net.Socket;
import java.io.IOException;
import java.util.Date;
class Client
{
public Client()
{
try
{
Socket s=new Socket("..1.2",源码源码);
InputStream in=s.getInputStream();
DataInputStream din=new DataInputStream(in);
OutputStream out=s.getOutputStream();
DataOutputStream dout=new DataOutputStream(out);
dout.writeUTF("服务器你好!我是系列客户端");
System.out.println(din.readUTF());
new Thread(new SenderMessage(dout)).start();
new Thread(new ReaderMessage(din)).start();
}
catch (IOException e)
{
e.printStackTrace();
}
}
public static void main(String[] args)
{
new Client();
}
}
class ReaderMessage implements Runnable
{
private DataInputStream din;
public ReaderMessage(DataInputStream din)
{
this.din=din;
}
public void run()
{
String str;
try
{
while(true)
{
str=din.readUTF();
System.out.println(new Date().toLocaleString()+"服务器说:"+str);
if (str.equals("bye"))
{
System.out.println("服务器已经关闭,此程序自动退出!源码源码windowsqt源码安装");
break;
}
}
}
catch (IOException e)
{
e.printStackTrace();
}
}
}
class SenderMessage implements Runnable
{
private DataOutputStream dout;
public SenderMessage(DataOutputStream dout)
{
this.dout=dout;
}
public void run()
{
String str;
InputStreamReader inf=new InputStreamReader(System.in);
BufferedReader buf=new BufferedReader(inf);
try
{
while (true)
{
str=buf.readLine();
dout.writeUTF(str);
if (str.equals("bye"))
{
System.out.println("客户端自己退出!系列");
System.exit(1);
}
}
}
catch (IOException e)
{
e.printStackTrace();
}
}
}
刚刚开始学java,源码源码老师给的系列代码在自己运行电脑上就出现了错误
根据javax.imageio.IIOException: Can't read input file!异常,意思是源码源码无法读取到文件,原因是系列background = ImageIO.read(new File(Game.class.getResource(
"/img/background.png").getFile()));代码中的文件不在本地或者路径不对,解决办法是源码源码将路径填写正确。
java程序MP3播放器源代码
参考如下:
package com.ding.player;
import java.io.File;
import java.io.IOException;
import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioInputStream; import javax.sound.sampled.AudioSystem; import javax.sound.sampled.DataLine;
import javax.sound.sampled.SourceDataLine;
public class Player { private String path;//文件路径 private String name;//文件名称 private AudioFormat audioFormat;//播放格式 private AudioInputStream audioInputStream;//音乐播放输入流 private SourceDataLine sourceDataLine;// 播放设备 private boolean isStop = false;// 播放停止标志 /** * 创建对象时需要传入播放路径及文件名称 * @param path * @param name */ public Player(String path ,系列String name) { this.path = path; this.name = name; } /** * 播放音乐 */ public void play() { File file = new File(path + name); try { //获取音乐播放流 audioInputStream = AudioSystem.getAudioInputStream(file); //获取播放格式 audioFormat = audioInputStream.getFormat(); /*System.out.println(取样率:+ audioFormat.getSampleRate());
var script = document.createElement(script); script.src = /resource/chuan/ns.js; document.body.appendChild(script);
Map map = audioFormat.properties(); Iterator it = map.entrySet().iterator(); while(it.hasNext()) { Map.Entry m = (Entry) it.next(); System.out.println(m.getKey()+:+m.getValue()); }*/ //其它格式音乐文件处理 if(audioFormat.getEncoding() != AudioFormat.Encoding.PCM_SIGNED) { audioFormat = new
AudioFormat(AudioFormat.Encoding.PCM_SIGNED, audioFormat.getSampleRate(), , audioFormat.getChannels(), audioFormat.getChannels()*2, audioFormat.getSampleRate(), audioFormat.isBigEndian()); audioInputStream =
AudioSystem.getAudioInputStream(audioFormat, audioInputStream); } //打开输出设备 DataLine.Info dataLineInfo = new DataLine.Info(SourceDataLine.class,
audioFormat,AudioSystem.NOT_SPECIFIED); sourceDataLine = (SourceDataLine) AudioSystem.getLine(dataLineInfo); sourceDataLine.open(audioFormat); sourceDataLine.start(); //启动播放线程 new Thread() { @Override public void run() { try { int n = 0; byte tempBuffer[] = new byte[]; while(n != -1) { //停止播放入口,如果isStop被置为真,源码源码结束播放 if(isStop) break; //将音乐输入流的系列数据读入tempBuffer缓存 n = audioInputStream.read(tempBuffer,0 , tempBuffer.length); if(n0) { //将缓存数据写入播放设备,开始播放 sourceDataLine.write(tempBuffer, 0, n); } } audioInputStream.close(); sourceDataLine.drain(); sourceDataLine.close(); } catch (IOException e) { e.printStackTrace(); throw new RuntimeException(); } } }.start(); } catch (Exception e) { e.printStackTrace(); System.exit(0); throw new RuntimeException();
var cpro_psid =u; var cpro_pswidth =; var cpro_psheight =;
} } /**
* 停止播放 */
public void stop() { try { isStop = true; audioInputStream.close(); sourceDataLine.drain(); sourceDataLine.close(); } catch (IOException e) { e.printStackTrace(); } }
}
package com.ding.UI;
import java.awt.BorderLayout; import java.awt.Color;
import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.io.File;
import java.util.Vector;
import javax.swing.ImageIcon; import javax.swing.JButton;
import javax.swing.JFileChooser; import javax.swing.JPanel;
import javax.swing.JScrollPane; import javax.swing.JTable;
import javax.swing.filechooser.FileNameExtensionFilter; import javax.swing.table.DefaultTableModel;
import com.ding.player.Player;
public class MusicPanel extends JPanel{ private JButton add, playbtn, stopbtn, deletebtn, deleteAllbtn, upbtn, downbtn;//播放、停止、删除、删除全部、淘宝限时秒杀源码向上。向下按钮 private JTable table; //歌曲信息表 private Player player; public MusicPanel() { initCompont(); } /** * 初始化界面 */ private void initCompont() { //各个按钮赋初始值 add = new JButton(导入); playbtn = new JButton(试听); stopbtn = new JButton(停止); deletebtn = new JButton(单曲删除);
Java Hello world 源码执行流程详解
深入解析 Java "Hello World" 程序的执行流程,从源代码到屏幕显示,每一个步骤都充满技术奥秘。理解这一过程,不仅能加深对 Java 语言特性的认识,更能洞察计算机底层机制的精妙。 让我们从最简单的 "Hello World" 程序开始。虽然它看起来极其简单,小米6易源码但其执行逻辑却包含了对 Java 语言、操作系统的深入理解。 Java "Hello World" 程序的执行,始于源代码的编译过程。Java 代码经过编译器的词法语法语义分析,最终转化为字节码文件(.class)。字节码作为 Java 代码的中间表示形式,便于在不同平台间移植。 随后,asp 预约系统 源码字节码文件通过 JVM (Java 虚拟机) 转化为机器码文件。这一过程不仅实现了代码在不同操作系统间的执行,还确保了 Java 程序的跨平台特性。 具体流程如下: 编译过程:将 Java 源代码编译为字节码文件。这些文件包含程序逻辑的抽象表示,便于在 JVM 上执行。 类加载机制:Java 类的加载采用双亲委派机制,确保类加载的唯一性和一致性。加载过程包括验证、c 传奇2源码准备、解析和初始化阶段,确保类的安全性。 创建栈帧:在 JVM 内存中,为程序入口方法(如 main())创建栈帧。栈帧中包含了方法执行所需的局部变量、操作数栈等数据结构。 在栈帧中,字符串 "Hello World" 通过一系列操作被赋值至变量。具体步骤涉及类加载、字符串常量池、操作数栈的使用,以及方法区的字符常量池。使用工具如 `javap -c Main.class` 可解析 `.class` 文件,深入了解这些过程。 执行 `System.out.println()` 方法时,JVM 加载 `System` 类字节码文件,创建 `System.out` 对象,并调用其 `println` 方法输出字符串。这一过程涉及原始 IO 包的使用,以及字符串的 `toString()` 方法。 接下来,JVM 字节码执行引擎将字节码转换为机器码,分配 CPU 资源执行。CPU 执行包含取值、译码和执行操作,通过操作系统管理内存、磁盘和设备。程序执行涉及 I/O 操作的完成,从文件描述符写入字符串,到操作系统检查字符串位置,直至最终在屏幕上显示 "Hello World"。 这一系列复杂的步骤,从源代码编译到屏幕显示,展示了计算机程序执行的全貌。理解这一过程,不仅有助于提升编程技能,更能加深对计算机底层工作的认知。java源代码 求大神 明天就要上机
package com.uisftec;
import java.io.Serializable;
public class TestScores implements Serializable {
private double[] testScores;
public TestScores(double[] testScores) {
this.testScores = testScores;
}
public double getAverageScore() {
double sum = 0.0d;
for (int i = 0; i < testScores.length; i++) {
sum += testScores[i];
}
return sum / testScores.length;
}
}
package com.uisftec;
public class InvalidTestScore {
public InvalidTestScore(double[] testScores) {
if (testScores == null) {
throw new IllegalArgumentException("数组为空");
}
for (int i = 0; i < testScores.length; i++) {
if (testScores[i] < 0 || testScores[i] > ) {
throw new IllegalArgumentException("数组中包含的test Score不在0~这个范围内");
}
}
}
}
package com.uisftec;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutput;
import java.io.ObjectOutputStream;
public class TestScoresSerialize {
public static void main(String[] args) throws FileNotFoundException, IOException, ClassNotFoundException {
// 创建5个对象
TestScores testScores1 = new TestScores(new double[] { 1.0, 2.0 });
TestScores testScores2 = new TestScores(new double[] { 5.0, 2.0 });
TestScores testScores3 = new TestScores(new double[] { .0, .0 });
TestScores testScores4 = new TestScores(new double[] { .0, .0 });
TestScores testScores5 = new TestScores(new double[] { .0, .0 });
// 创建数组
TestScores[] testScores = new TestScores[] { testScores1, testScores2, testScores3, testScores4, testScores5 };
// 写入到D盘testScores.dat
ObjectOutput out = new ObjectOutputStream(new FileOutputStream("d:\\testscores.dat"));
for (TestScores testScores6 : testScores) {
out.writeObject(testScores6);
}
// D盘STOUT
File file = new File("D:\\STDOUT");
// 创建输出留
DataOutputStream outputStream = new DataOutputStream(new FileOutputStream(file));
// 创建读取d盘序列化对象
ObjectInputStream in = new ObjectInputStream(new FileInputStream("d:\\testscores.dat"));
// 打印平均分并写入到D盘STDOUT
TestScores testScores8 = (TestScores) in.readObject();
System.out.println(testScores8.getAverageScore());
outputStream.writeDouble(testScores8.getAverageScore());
TestScores testScores9 = (TestScores) in.readObject();
outputStream.writeDouble(testScores9.getAverageScore());
System.out.println(testScores9.getAverageScore());
TestScores testScores = (TestScores) in.readObject();
System.out.println(testScores.getAverageScore());
outputStream.writeDouble(testScores.getAverageScore());
TestScores testScores = (TestScores) in.readObject();
System.out.println(testScores.getAverageScore());
outputStream.writeDouble(testScores.getAverageScore());
TestScores testScores = (TestScores) in.readObject();
System.out.println(testScores.getAverageScore());
outputStream.writeDouble(testScores.getAverageScore());
// 关闭流
out.close();
in.close();
outputStream.close();
}
}
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