我真的对此感到困惑：当我在eclipse中正常运行我的程序时，我的一些代码无法运行，但是当我使用调试模式单独运行每个步骤时，它确实工作了。
代码：
public void showConnectDialog() {
ConnectDialog connectDialog = new ConnectDialog();
connectDialog.setVisible(true);
//Until here, code runs
while(! connectDialog.getConnected()) {};
//The next line does only run in debug
JOptionPane.showMessageDialog(connectDialog, "Connected", "Connected", JOptionPane.INFORMATION_MESSAGE);
}
连接器（一旦用户在对话框中点击“连接”）就会启动（作为一个线程）：
private class ServerConnector implements ActionListener, Runnable {
@Override
public void actionPerformed(ActionEvent e) {
if (! IP_field.getText().equals("")) {
if (! isConnecting) {
new Thread(new ServerConnector(), "ServerConnector").start();
}
}
else {
JOptionPane.showMessageDialog(dialog,
"Enter an IP address",
"Enter IP",
JOptionPane.WARNING_MESSAGE);
}
}
@Override
public void run() {
try {
setConnecting(true);
Socket socket = connect();
if (socket != null) {
ObjectOutputStream oOut = new ObjectOutputStream(socket.getOutputStream());
ObjectInputStream oIn = new ObjectInputStream(socket.getInputStream());
if (login(oOut, oIn)) {
isConnected = true;
setConnecting(false);
}
else {
socket.close();
}
setConnecting(false);
}
}
catch (RSPException e) {
e.printStackTrace();
System.exit(1);
}
catch (Exception e) {
//If an exception occurs, setConnecting() will be true. This
//not good, so it has to be set to false
e.printStackTrace();
setConnecting(false);
}
}
private boolean login(ObjectOutputStream oOut, ObjectInputStream oIn)
throws ClassNotFoundException, IOException, RSPException {
//Send login request action:
oOut.writeObject(new LoginAction(ActionSender.CLIENT, getID(),
getPassword()));
Object obj = oIn.readObject();
if (obj instanceof LoginActionResult) {
LoginActionResult result = (LoginActionResult) obj;
if (result.getResult() == LoginResults.SUCCES) {
return true;
}
else if (result.getResult() == LoginResults.FAIL_ON_ID) {
JOptionPane.showMessageDialog(dialog,
"Invalid password or ID",
"Can't login",
JOptionPane.ERROR_MESSAGE);
return false;
}
else if (result.getResult() == LoginResults.FAIL_ON_PASSWORD) {
JOptionPane.showMessageDialog(dialog,
"Invalid password or ID",
"Can't login",
JOptionPane.ERROR_MESSAGE);
return false;
}
else if (result.getResult() == LoginResults.SERVER_FULL) {
JOptionPane.showMessageDialog(dialog,
"Couldn't connect: \n" +
"Server is full",
"Failed to connect",
JOptionPane.WARNING_MESSAGE);
return false;
}
else {
return false;
}
}
else {
System.out.println(obj);
throw new RSPException("Server is not following the protocol.");
}
}
private void setConnecting(boolean connecting) {
if (connecting) {
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
connectButton.setEnabled(false);
}
});
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
connectButton.setText("Connecting...");
}
});
}
else {
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
connectButton.setText("Connect");
}
});
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
connectButton.setEnabled(true);
}
});
}
isConnecting = connecting;
}
private String getAddressFromTextField() {
return IP_field.getText();
}
private InetAddress getInetAddress(String fullAddress) {
try {
if (fullAddress.contains(":")) {
String[] splitAddress = fullAddress.split(":");
return InetAddress.getByName(splitAddress[0]);
}
else {
return InetAddress.getByName(fullAddress);
}
}
catch (UnknownHostException e) {
return null;
}
}
private int getPort(String fullAddress) {
try {
String[] splittedAddress = fullAddress.split(":");
return Integer.valueOf(splittedAddress[1]);
}
catch (NumberFormatException ex) {
return -1;
}
catch (NullPointerException
| ArrayIndexOutOfBoundsException
| PatternSyntaxException ex) {
//Returning default port value: 25566, because no port was given
return 25566;
}
}
@SuppressWarnings("resource")
private Socket connect() {
Socket socket = null;
InetAddress address = null;
if ((address = getInetAddress(getAddressFromTextField())) == null) {
return null;
}
int port = getPort(getAddressFromTextField());
try {
socket = new Socket(address, port);
}
catch (ConnectException e ) {
Socket retrySocket = null;
if ((retrySocket = retryConnect(address, port)) == null) {
JOptionPane.showMessageDialog(dialog,
"Connection timed out",
"Failed to connect",
JOptionPane.ERROR_MESSAGE);
setConnecting(false);
}
else {
socket = retrySocket;
}
}
catch(IOException e) {
e.printStackTrace();
}
return socket;
}
private Socket retryConnect(InetAddress address, int port) {
Thread waitThread = new Thread(new Runnable() {
@Override
public void run() {
try {
//Will wait 15(000) (milli)seconds before stopping with
//trying to connect.
//One second (1000 millis) is for debugging and testing
Thread.sleep(1000);
}
catch (InterruptedException e) {
e.printStackTrace();
}
}
});
waitThread.start();
while (waitThread.isAlive()) {
try {
return new Socket(address, port);
}
catch (ConnectException e) {
//Do nothing, will re-attempt to connect.
}
catch (IOException e) {
e.printStackTrace();
}
}
return null;
}
private String getID() {
return ID_field.getText();
}
private String getPassword() {
if (getID().equals("master")) {
return "masterPassword";
}
else {
return new String(passwordField.getPassword());
}
}
}
getConnected()一旦连接到服务器就会返回true。连接器在单独的线程上运行。
编辑：我尝试将代码置于getConnected() while块中，然后就可以了。为什么它会起作用而不是其他？
答案 0 :(得分：3)
我有同样的问题，但有更多规范。代码在32位工作正常，但我在64位中遇到了这个问题（我使用本机库，所以我需要维护它们。）
我找到的解决方案是在while循环中添加Thread.sleep（）。我不知道它为什么会起作用，所以你的猜测和我的一样好。
更好的解决方案可能是实现Observer Pattern而不是无限循环。但这需要一些重新分解。
答案 1 :(得分：2)
我和＃34;我有一个非常相似的问题。循环不会运行，循环是我的主要例程。如何让循环运行是在循环中完成的第一件事是睡眠：
try
{Thread.sleep(0);}
catch (Exception e)
{e.printStackTrace();}
这足以让一切顺利。
答案 2 :(得分：1)
正如其他答案所建议的，使用Thread.sleep()应该可以解决问题，但这不是一个非常好的方法。相反，我们应该使用Thread.yield()。
为什么yield而不是sleep？
参见： Difference between Thread.Sleep(0) and Thread.Yield()和Are Thread.sleep(0) and Thread.yield() statements equivalent?
为什么会这样？
当我们运行线程时，操作系统将它们置于＆＃34;空闲＆＃34;状态以及何时被唤醒＆＃34;唤醒＆＃34;，它没有。另一方面，在调试模式下，我们有一个受控环境。操作系统几乎无法控制它，因为一切都在逐步，缓慢地进行。如果我们在没有任何断点的情况下运行调试几次，在几次成功运行之后，我们应该看到相同的效果。
答案 3 :(得分：0)
我在UIAutomator中遇到了与UiObject2 wait（Until.findObject（），20）相同的问题。
Thread.yield（）-为我工作