Java 内存泄漏和runnable类的奇怪错误-如何正确处理对象？_Java_Multithreading_Swing_Memory Leaks_Runnable

Java 内存泄漏和runnable类的奇怪错误-如何正确处理对象？

java multithreading swing memory-leaks

Java 内存泄漏和runnable类的奇怪错误-如何正确处理对象？,java,multithreading,swing,memory-leaks,runnable,Java,Multithreading,Swing,Memory Leaks,Runnable,我正在构建一个服务器应用程序，以跟踪有多少人正在运行我最近构建的另一个应用程序。这更多的是为了测试我自己，看看我能用这门语言做些什么，在几乎没有时间的情况下，我就能够让事情顺利进行。然而，在应用程序上运行人工测试时，我遇到了一个严重的问题。我会发布我的代码主要类别： public class ServerGUIStatistics { public static MainWindow mw = null; private static int _port = 33672; public s

我正在构建一个服务器应用程序，以跟踪有多少人正在运行我最近构建的另一个应用程序。这更多的是为了测试我自己，看看我能用这门语言做些什么，在几乎没有时间的情况下，我就能够让事情顺利进行。然而，在应用程序上运行人工测试时，我遇到了一个严重的问题。我会发布我的代码

主要类别：

public class ServerGUIStatistics {

public static MainWindow mw = null;
private static int _port = 33672;

public static void main(String[] args) {
    mw = new MainWindow();
    new ServerGUIStatistics();
}

public ServerGUIStatistics(){
    ServerSocket listener = null;
    try{
        listener = new ServerSocket(_port, 100);
        while(true){
           System.out.println("Waiting for connection....");
           Socket connection = listener.accept(); 
           Connection nc = new Connection(connection);
        }
    }
    catch(Exception ex){
        mw.setConsoleOutput(ex.getMessage(), 2);// Prints to a console output window...
    }
}

我认为引起这些问题的是可燃类

class Connection implements Runnable {
private static int _totalConnections = 0;
private static long _totalConnectionsAllTime = 0;
private Socket socket = null;
private boolean stopFlag = true;

@Override
public void run(){
    while(stopFlag){
        stopFlag = false;
        ServerGUIStatistics.mw.setConsoleOutput("New connection from \"" + socket.getInetAddress().toString() + "\" on port " + socket.getPort(), 0);// Prints to a console output window... 
        ServerGUIStatistics.mw.updateConNumber(_totalConnections);
        ServerGUIStatistics.mw.updateConAllTimeNumber(_totalConnectionsAllTime);//Updates a field on the main window which displays the total number of users connected
        boolean stayAlive = true;
        try{
            socket.setSoTimeout(10000);
            BufferedInputStream connectionStatus = new BufferedInputStream(socket.getInputStream());
            do{
                int holder = connectionStatus.read();
                switch(holder){
                    case 1:
                        stayAlive = true;
                        break;
                    case 0:
                        stayAlive = false;
                        break;
                } 
            }
            while(stayAlive);
        }
        catch(IOException ex){
            ServerGUIStatistics.mw.setConsoleOutput(socket.getInetAddress().toString() + " " + ex.getMessage(), 2); // Prints to a console output window...
        }
        _totalConnections--;
        ServerGUIStatistics.mw.updateConNumber(_totalConnections); //Updates a field on the main window which displays the current number of users connected
        return;
    }
}

Connection(Socket soc){
    socket = soc;
    _totalConnections++;
    _totalConnectionsAllTime++;
    new Thread(this).start();
}

public static int getTotalConnections(){
    return _totalConnections;
}

以下是swing窗口（由netbeans生成）：

import java.util.Date；
导入java.text.*；
公共类主窗口扩展了javax.swing.JFrame{
/**
*在主窗口中创建新窗体
*/
私有日期curDate=null；
私有SimpleDataFormat ft=新SimpleDataFormat（“MM/dd/yyyy@hh:MM:ss”）；
公共主窗口（）{
初始化组件（）；
此.setVisible（true）；
}
/**
*从构造函数中调用此方法来初始化表单。
*警告：不要修改此代码。此方法的内容始终为
*由表单编辑器重新生成。
*/
@抑制警告（“未选中”）
//                           
私有组件（）{
bindingGroup=new org.jdesktop.beansbinding.bindingGroup（）；
jTabbedPane1=newjavax.swing.JTabbedPane（）；
jPanel1=newjavax.swing.JPanel（）；
totalConnectionsOut=newjavax.swing.JTextField（）；
totalConnectionsAllTimeOut=newjavax.swing.JTextField（）；
jLabel1=newjavax.swing.JLabel（）；
jLabel2=newjavax.swing.JLabel（）；
jPanel3=newjavax.swing.JPanel（）；
jScrollPane2=newjavax.swing.JScrollPane（）；
consoleOutput=newjavax.swing.JTextArea（）；
setDefaultCloseOperation（javax.swing.WindowConstants.EXIT_ON_CLOSE）；
totalConnectionsOut.setFont（新的java.awt.Font（“Tahoma”，0，58））；//NOI18N
setHorizontalAlignment（javax.swing.JTextField.CENTER）；
totalConnectionsOut.setText（“0”）；
org.jdesktop.beansbinding.Binding Binding Binding=org.jdesktop.beansbinding.Bindings.createAutoBinding（org.jdesktop.beansbinding.AutoBinding.UpdateStrategy.READ_WRITE，totalConnectionsOut，org.jdesktop.beansbinding.ELProperty.create（“false”），totalConnectionsOut，org.jdesktop.beansbinding.BeanProperty.create（“可编辑”）；
bindingGroup.addBinding（绑定）；
totalConnectionsAllTimeOut.setFont（新的java.awt.Font（“Tahoma”，0，58））；//NOI18N
totalConnectionsAllTimeOut.setHorizontalAlignment（javax.swing.JTextField.CENTER）；
totalConnectionsAllTimeOut.setText（“0”）；
binding=org.jdesktop.beansbinding.Bindings.createAutoBinding（org.jdesktop.beansbinding.AutoBinding.UpdateStrategy.READ_WRITE，totalConnectionsAllTimeOut，org.jdesktop.beansbinding.ELProperty.create（“false”），totalConnectionsAllTimeOut，org.jdesktop.beansbinding.BeanProperty.create（“可编辑”）；
bindingGroup.addBinding（绑定）；
jLabel1.setHorizontalAlignment（javax.swing.SwingConstants.CENTER）；
jLabel1.setText（“总连接数：”）；
setHorizontalAlignment（javax.swing.SwingConstants.CENTER）；
jLabel2.setText（“总电流连接：”）；
javax.swing.GroupLayout jPanel1Layout=新的javax.swing.GroupLayout（jPanel1）；
setLayout（jPanel1Layout）；
jPanel1Layout.setHorizontalGroup(
jPanel1Layout.createParallelGroup（javax.swing.GroupLayout.Alignment.LEADING）
.addGroup（jpanellayout.createSequentialGroup（）
.addContainerGap（）
.addGroup（jPanel1Layout.createParallelGroup（javax.swing.GroupLayout.Alignment.LEADING）
.addComponent（总连接输出）
.addComponent（totalConnectionsAllTimeOut，javax.swing.GroupLayout.Alignment.training，javax.swing.GroupLayout.DEFAULT_SIZE，571，Short.MAX_值）
.addComponent（jLabel1，javax.swing.GroupLayout.DEFAULT\u SIZE，javax.swing.GroupLayout.DEFAULT\u SIZE，Short.MAX\u值）
.addComponent（jLabel2，javax.swing.GroupLayout.DEFAULT\u SIZE，javax.swing.GroupLayout.DEFAULT\u SIZE，Short.MAX\u VALUE））
.addContainerGap（））
);
jPanel1Layout.setVerticalGroup(
jPanel1Layout.createParallelGroup（javax.swing.GroupLayout.Alignment.LEADING）
.addGroup（jpanellayout.createSequentialGroup（）
.addComponent（jLabel2，javax.swing.GroupLayout.PREFERRED\u SIZE，29，javax.swing.GroupLayout.PREFERRED\u SIZE）
.addGap（4,4,4）
.addComponent（TotalConnectionOut，javax.swing.GroupLayout.PREFERRED_SIZE，150，javax.swing.GroupLayout.PREFERRED_SIZE）
.addPreferredGap（javax.swing.LayoutStyle.ComponentPlacement.RELATED）
.addComponent（jLabel1，javax.swing.GroupLayout.DEFAULT\u SIZE，34，Short.MAX\u值）
.addPreferredGap（javax.swing.LayoutStyle.ComponentPlacement.RELATED）
.addComponent（totalConnectionsAllTimeOut，javax.swing.GroupLayout.PREFERRED\u大小，150，javax.swing.GroupLayout.PREFERRED\u大小）
.addContainerGap（））
);
jTabbedPane1.addTab（“Info”，jPanel1）；
控制台输出设置列（20）；
控制台输出设置行（5）；
binding=org.jdesktop.beansbinding.Bindings.createAutoBinding（org.jdesktop.beansbinding.AutoBinding.UpdateStrategy.READ_WRITE，consoleOutput，org.jdesktop.beansbinding.ELProperty.create（“false”），consoleOutput，org.jdesktop.beansbinding.BeanProperty.create（“可编辑”）；
bindingGroup.addBinding（绑定）；
jScrollPane2.setViewportView（控制台输出）；
javax.swing.GroupLayout jPanel3Layout=新的javax.swing.GroupLayout（jPanel3）；
setLayout（jPanel3Layout）；
jPanel3Layout.setHorizontalGroup(
jPanel3Layout.createParallelGroup（javax.swing.GroupLayout.Alignment.LEADING）
.addGroup（jPanel3Layout.createSequentialGroup（）
.addContainerGap（）
.addComponent（jScrollPane2，javax.swing.GroupLayout.DEFAULT_SIZE，571，Short.MAX_VALUE）
.addContainerGap（））
);
jPanel3Layout.setVerticalGroup(
jPanel3Layout.createParallelGroup（javax.swing.GroupLa
import java.util.Date;
import java.text.*;

public class MainWindow extends javax.swing.JFrame {

/**
 * Creates new form MainWindow
 */
private Date curDate = null;
private SimpleDateFormat ft = new SimpleDateFormat ("MM/dd/yyyy @ hh:mm:ss");

public MainWindow() {
    initComponents();
    this.setVisible(true);
}
/**
 * This method is called from within the constructor to initialize the form.
 * WARNING: Do NOT modify this code. The content of this method is always
 * regenerated by the Form Editor.
 */
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">                          
private void initComponents() {
    bindingGroup = new org.jdesktop.beansbinding.BindingGroup();

    jTabbedPane1 = new javax.swing.JTabbedPane();
    jPanel1 = new javax.swing.JPanel();
    totalConnectionsOut = new javax.swing.JTextField();
    totalConnectionsAllTimeOut = new javax.swing.JTextField();
    jLabel1 = new javax.swing.JLabel();
    jLabel2 = new javax.swing.JLabel();
    jPanel3 = new javax.swing.JPanel();
    jScrollPane2 = new javax.swing.JScrollPane();
    consoleOutput = new javax.swing.JTextArea();

    setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

    totalConnectionsOut.setFont(new java.awt.Font("Tahoma", 0, 58)); // NOI18N
    totalConnectionsOut.setHorizontalAlignment(javax.swing.JTextField.CENTER);
    totalConnectionsOut.setText("0");

    org.jdesktop.beansbinding.Binding binding = org.jdesktop.beansbinding.Bindings.createAutoBinding(org.jdesktop.beansbinding.AutoBinding.UpdateStrategy.READ_WRITE, totalConnectionsOut, org.jdesktop.beansbinding.ELProperty.create("false"), totalConnectionsOut, org.jdesktop.beansbinding.BeanProperty.create("editable"));
    bindingGroup.addBinding(binding);

    totalConnectionsAllTimeOut.setFont(new java.awt.Font("Tahoma", 0, 58)); // NOI18N
    totalConnectionsAllTimeOut.setHorizontalAlignment(javax.swing.JTextField.CENTER);
    totalConnectionsAllTimeOut.setText("0");

    binding = org.jdesktop.beansbinding.Bindings.createAutoBinding(org.jdesktop.beansbinding.AutoBinding.UpdateStrategy.READ_WRITE, totalConnectionsAllTimeOut, org.jdesktop.beansbinding.ELProperty.create("false"), totalConnectionsAllTimeOut, org.jdesktop.beansbinding.BeanProperty.create("editable"));
    bindingGroup.addBinding(binding);

    jLabel1.setHorizontalAlignment(javax.swing.SwingConstants.CENTER);
    jLabel1.setText("Total Connections:");

    jLabel2.setHorizontalAlignment(javax.swing.SwingConstants.CENTER);
    jLabel2.setText("Total Current Connections:");

    javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);
    jPanel1.setLayout(jPanel1Layout);
    jPanel1Layout.setHorizontalGroup(
        jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGroup(jPanel1Layout.createSequentialGroup()
            .addContainerGap()
            .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                .addComponent(totalConnectionsOut)
                .addComponent(totalConnectionsAllTimeOut, javax.swing.GroupLayout.Alignment.TRAILING, javax.swing.GroupLayout.DEFAULT_SIZE, 571, Short.MAX_VALUE)
                .addComponent(jLabel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                .addComponent(jLabel2, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
            .addContainerGap())
    );
    jPanel1Layout.setVerticalGroup(
        jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGroup(jPanel1Layout.createSequentialGroup()
            .addComponent(jLabel2, javax.swing.GroupLayout.PREFERRED_SIZE, 29, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addGap(4, 4, 4)
            .addComponent(totalConnectionsOut, javax.swing.GroupLayout.PREFERRED_SIZE, 150, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
            .addComponent(jLabel1, javax.swing.GroupLayout.DEFAULT_SIZE, 34, Short.MAX_VALUE)
            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
            .addComponent(totalConnectionsAllTimeOut, javax.swing.GroupLayout.PREFERRED_SIZE, 150, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addContainerGap())
    );

    jTabbedPane1.addTab("Info", jPanel1);

    consoleOutput.setColumns(20);
    consoleOutput.setRows(5);

    binding = org.jdesktop.beansbinding.Bindings.createAutoBinding(org.jdesktop.beansbinding.AutoBinding.UpdateStrategy.READ_WRITE, consoleOutput, org.jdesktop.beansbinding.ELProperty.create("false"), consoleOutput, org.jdesktop.beansbinding.BeanProperty.create("editable"));
    bindingGroup.addBinding(binding);

    jScrollPane2.setViewportView(consoleOutput);

    javax.swing.GroupLayout jPanel3Layout = new javax.swing.GroupLayout(jPanel3);
    jPanel3.setLayout(jPanel3Layout);
    jPanel3Layout.setHorizontalGroup(
        jPanel3Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGroup(jPanel3Layout.createSequentialGroup()
            .addContainerGap()
            .addComponent(jScrollPane2, javax.swing.GroupLayout.DEFAULT_SIZE, 571, Short.MAX_VALUE)
            .addContainerGap())
    );
    jPanel3Layout.setVerticalGroup(
        jPanel3Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGroup(jPanel3Layout.createSequentialGroup()
            .addContainerGap()
            .addComponent(jScrollPane2, javax.swing.GroupLayout.DEFAULT_SIZE, 368, Short.MAX_VALUE)
            .addContainerGap())
    );

    jTabbedPane1.addTab("Console Output", jPanel3);

    javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
    getContentPane().setLayout(layout);
    layout.setHorizontalGroup(
        layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addComponent(jTabbedPane1)
    );
    layout.setVerticalGroup(
        layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addComponent(jTabbedPane1)
    );

    bindingGroup.bind();

    pack();
}// </editor-fold>                        

public void setConsoleOutput(String s, int i){
    String type = null;
    switch(i){
        case 0:
            type = "Info";
            break;
        case 1:
            type = "Error";
            break;
        case 2:
            type = "Exception";
            break;
        default:
            type = "Unknown";
            break;
    }
    curDate = new Date();
    String output = consoleOutput.getText() + "[" + ft.format(curDate) + "][" + type + "] " + s + "\n";
    consoleOutput.setText(output);
}

public void updateConNumber(int i){
    totalConnectionsOut.setText(Integer.toString(i));
}

public void updateConAllTimeNumber(long i){
    totalConnectionsAllTimeOut.setText(Long.toString(i));
}

// Variables declaration - do not modify                     
private javax.swing.JTextArea consoleOutput;
private javax.swing.JLabel jLabel1;
private javax.swing.JLabel jLabel2;
private javax.swing.JPanel jPanel1;
private javax.swing.JPanel jPanel3;
private javax.swing.JScrollPane jScrollPane2;
private javax.swing.JTabbedPane jTabbedPane1;
private javax.swing.JTextField totalConnectionsAllTimeOut;
private javax.swing.JTextField totalConnectionsOut;
private org.jdesktop.beansbinding.BindingGroup bindingGroup;
// End of variables declaration                   

class Main{
    public static void main(String[] args){
        while(true){
            try{
                Socket socket = new Socket("127.0.0.1", 33672);
                BufferedOutputStream out = new BufferedOutputStream(socket.getOutputStream());

                for(int i = 0; i < 5; i++){
                    out.write(1);
                    out.flush();
                    Thread.sleep(10);
                }

                out.write(0);
                out.flush();

                out.close();
                socket.close();
            }
            catch(Exception ex){System.out.println(ex);}
            System.out.println("Finished! Running again...");
        }
    }
}

while(stopFlag){
    stopFlag = false;
    ServerGUIStatistics.mw.setConsoleOutput("New connection from \"" + socket.getInetAddress().toString() + "\" on port " + socket.getPort(), 0);// Prints to a console output window... 
    ServerGUIStatistics.mw.updateConNumber(_totalConnections);
    ServerGUIStatistics.mw.updateConAllTimeNumber(_totalConnectionsAllTime);//Updates a field on the main window which displays the total number of users connected
    boolean stayAlive = true;
    try{
        socket.setSoTimeout(10000);
        BufferedInputStream connectionStatus = new BufferedInputStream(socket.getInputStream());
        do{
            int holder = connectionStatus.read();
            switch(holder){
                case 1:
                    stayAlive = true;
                    break;
                case 0:
                    stayAlive = false;
                    break;
            } 
        }
        while(stayAlive);
    }
    catch(IOException ex){
        ServerGUIStatistics.mw.setConsoleOutput(socket.getInetAddress().toString() + " " + ex.getMessage(), 2); // Prints to a console output window...
    }
    _totalConnections--;
    ServerGUIStatistics.mw.updateConNumber(_totalConnections); //Updates a field on the main window which displays the current number of users connected
    return;
}

ServerGUIStatistics.mw.setConsoleOutput("New connection from \"" + socket.getInetAddress().toString() + "\" on port " + socket.getPort(), 0);// Prints to a console output window... 
ServerGUIStatistics.mw.updateConNumber(_totalConnections);
ServerGUIStatistics.mw.updateConAllTimeNumber(_totalConnectionsAllTime);//Updates a field on the main window which displays the total number of users connected
boolean stayAlive = true;
try {
    socket.setSoTimeout(10000);
    try (BufferedInputStream connectionStatus = new BufferedInputStream(socket.getInputStream())) {
        do {
            System.out.println(number + " reading...");
            int holder = connectionStatus.read();
            System.out.println(number + " read " + holder + "...");
            switch (holder) {
                case 1:
                    stayAlive = true;
                    break;
                case 0:
                    stayAlive = false;
                    break;
            }
        } while (stayAlive);
    }
} catch (IOException ex) {
    ServerGUIStatistics.mw.setConsoleOutput(socket.getInetAddress().toString() + " " + ex.getMessage(), 2); // Prints to a console output window...
} finally {
    System.out.println(number + " exiting");
    _totalConnections--;
    try {
        socket.close();
    } catch (Exception e) {
        e.printStackTrace();
    }
    socket = null;
    ServerGUIStatistics.mw.updateConNumber(_totalConnections); //Updates a field on the main window which displays the current number of users connected
}

public void setConsoleOutput(String s, int i){
    String type = null;
    switch(i){
        case 0:
            type = "Info";
            break;
        case 1:
            type = "Error";
            break;
        case 2:
            type = "Exception";
            break;
        default:
            type = "Unknown";
            break;
    }
    curDate = new Date();
    String output = consoleOutput.getText() + "[" + ft.format(curDate) + "][" + type + "] " + s + "\n";
    consoleOutput.setText(output);
}

String output = consoleOutput.getText() + "[" + ft.format(curDate) + "][" + type + "] " + s + "\n";

public void setConsoleOutput(String s, int i) {
    String type = null;
    switch (i) {
        case 0:
            type = "Info";
            break;
        case 1:
            type = "Error";
            break;
        case 2:
            type = "Exception";
            break;
        default:
            type = "Unknown";
            break;
    }
    String output = "[" + ft.format(System.currentTimeMillis()) + "][" + type + "] " + s + "\n";
    consoleOutput.append(output);
}