如何定制Java/JavaFX控制台?
有必要定制一个控制台。我有以下代码:如何定制Java/JavaFX控制台?,java,javafx-2,jconsole,Java,Javafx 2,Jconsole,有必要定制一个控制台。我有以下代码: public class Console extends OutputStream{ private Console(ResourceBundle resourceBundle) throws IOException { FXMLLoader loader = new FXMLLoader(this.getClass().getResource("Console.fxml"), resourceBundle); controller = l
public class Console extends OutputStream{
private Console(ResourceBundle resourceBundle) throws IOException {
FXMLLoader loader = new FXMLLoader(this.getClass().getResource("Console.fxml"), resourceBundle);
controller = loader.getController();
Scene scene = new Scene((Parent) loader.load());
stage = new Stage();
stage.setScene(scene);
show();
}
@Override
public void write(int b) throws IOException {
controller.append(b);
}
public static Console getInstance(ResourceBundle resourceBundle) {
if (console == null) {
try {
console = new Console(resourceBundle);
} catch (IOException e) {
e.printStackTrace(); //To change body of catch statement use File | Settings | File Templates.
}
}
return console;
}
public void show() {
stage.show();
}
private static Console console = null;
private ConsoleController controller;
private Stage stage;
}
public class Console{
private Console(ResourceBundle resourceBundle) throws IOException {
FXMLLoader loader = new FXMLLoader(this.getClass().getResource("Console.fxml"), resourceBundle);
Parent root = (Parent) loader.load();
controller = loader.getController();
Scene scene = new Scene(root);
stage = new Stage();
stage.setScene(scene);
show();
if (errorOutputThread != null) {
errorOutputThread.interrupt();
try {
errorOutputThread.join();
} catch (InterruptedException e) {
e.printStackTrace(); //To change body of catch statement use File | Settings | File Templates.
}
errorOutputThread = null;
}
if (outOutputThread != null) {
outOutputThread.interrupt();
try {
outOutputThread.join();
} catch (InterruptedException e) {
e.printStackTrace(); //To change body of catch statement use File | Settings | File Templates.
}
outOutputThread = null;
}
System.err.flush();
System.out.flush();
outPipedInputStream = new PipedInputStream();
outPipedOutputStream = new PipedOutputStream(outPipedInputStream);
System.setOut(new PrintStream(outPipedOutputStream));
errorPipedInputStream = new PipedInputStream();
errorPipedOutputStream = new PipedOutputStream(errorPipedInputStream);
System.setErr(new PrintStream(errorPipedOutputStream));
outOutputThread = new Thread(new ConsoleStream(outPipedInputStream, "OUT"));
outOutputThread.setDaemon(true);
outOutputThread.start();
errorOutputThread = new Thread(new ConsoleStream(errorPipedInputStream, "ERROR"));
errorOutputThread.setDaemon(true);
errorOutputThread.start();
controller.appendText("Start Console");
}
public static Console getInstance(ResourceBundle resourceBundle) {
if (console == null) {
try {
console = new Console(resourceBundle);
} catch (IOException e) {
e.printStackTrace(); //To change body of catch statement use File | Settings | File Templates.
}
}
return console;
}
public void show() {
stage.show();
}
private class ConsoleStream implements Runnable {
private ConsoleStream(InputStream in, String type) {
inputStream = in;
this.type = type;
}
public void run() {
try {
InputStreamReader is = new InputStreamReader(inputStream);
BufferedReader br = new BufferedReader(is);
String read = null;
read = br.readLine();
while(read != null) {
controller.appendText(read + "\n");
read = br.readLine();
}
} catch (IOException e) {
e.printStackTrace(); //To change body of catch statement use File | Settings | File Templates.
}
controller.appendText("Thread" + type + "started");
}
private final InputStream inputStream;
private String type;
}
private static Console console = null;
private ConsoleController controller;
private Stage stage;
private PrintStream printStream;
private PipedOutputStream customPipedOutputStream;
private PipedOutputStream errorPipedOutputStream;
private PipedOutputStream outPipedOutputStream;
private PipedInputStream customPipedInputStream;
private PipedInputStream errorPipedInputStream;
private PipedInputStream outPipedInputStream;
private Thread customOutputThread;
private Thread outOutputThread;
private Thread errorOutputThread;
}
控制器文件:
public class ConsoleController implements Initializable {
@Override
public void initialize(URL url, ResourceBundle resourceBundle) {
}
@FXML
public void append(int i) {
textArea.appendText(String.valueOf((char) i));
}
@FXML
private TextArea textArea;
}
所有这些都是从“start()”调用的:
在异常期间,Console.fxml的textArea
中不会打印任何内容,但会引发以下异常:
线程“JavaFX应用程序线程”中出现异常
异常:java.lang.NullPointerException从线程“JavaFX应用程序线程”中的UncaughtExceptionHandler引发
我做错了什么
------编辑--------
了解了使用多个线程的必要性后,我有以下代码:
public class Console extends OutputStream{
private Console(ResourceBundle resourceBundle) throws IOException {
FXMLLoader loader = new FXMLLoader(this.getClass().getResource("Console.fxml"), resourceBundle);
controller = loader.getController();
Scene scene = new Scene((Parent) loader.load());
stage = new Stage();
stage.setScene(scene);
show();
}
@Override
public void write(int b) throws IOException {
controller.append(b);
}
public static Console getInstance(ResourceBundle resourceBundle) {
if (console == null) {
try {
console = new Console(resourceBundle);
} catch (IOException e) {
e.printStackTrace(); //To change body of catch statement use File | Settings | File Templates.
}
}
return console;
}
public void show() {
stage.show();
}
private static Console console = null;
private ConsoleController controller;
private Stage stage;
}
public class Console{
private Console(ResourceBundle resourceBundle) throws IOException {
FXMLLoader loader = new FXMLLoader(this.getClass().getResource("Console.fxml"), resourceBundle);
Parent root = (Parent) loader.load();
controller = loader.getController();
Scene scene = new Scene(root);
stage = new Stage();
stage.setScene(scene);
show();
if (errorOutputThread != null) {
errorOutputThread.interrupt();
try {
errorOutputThread.join();
} catch (InterruptedException e) {
e.printStackTrace(); //To change body of catch statement use File | Settings | File Templates.
}
errorOutputThread = null;
}
if (outOutputThread != null) {
outOutputThread.interrupt();
try {
outOutputThread.join();
} catch (InterruptedException e) {
e.printStackTrace(); //To change body of catch statement use File | Settings | File Templates.
}
outOutputThread = null;
}
System.err.flush();
System.out.flush();
outPipedInputStream = new PipedInputStream();
outPipedOutputStream = new PipedOutputStream(outPipedInputStream);
System.setOut(new PrintStream(outPipedOutputStream));
errorPipedInputStream = new PipedInputStream();
errorPipedOutputStream = new PipedOutputStream(errorPipedInputStream);
System.setErr(new PrintStream(errorPipedOutputStream));
outOutputThread = new Thread(new ConsoleStream(outPipedInputStream, "OUT"));
outOutputThread.setDaemon(true);
outOutputThread.start();
errorOutputThread = new Thread(new ConsoleStream(errorPipedInputStream, "ERROR"));
errorOutputThread.setDaemon(true);
errorOutputThread.start();
controller.appendText("Start Console");
}
public static Console getInstance(ResourceBundle resourceBundle) {
if (console == null) {
try {
console = new Console(resourceBundle);
} catch (IOException e) {
e.printStackTrace(); //To change body of catch statement use File | Settings | File Templates.
}
}
return console;
}
public void show() {
stage.show();
}
private class ConsoleStream implements Runnable {
private ConsoleStream(InputStream in, String type) {
inputStream = in;
this.type = type;
}
public void run() {
try {
InputStreamReader is = new InputStreamReader(inputStream);
BufferedReader br = new BufferedReader(is);
String read = null;
read = br.readLine();
while(read != null) {
controller.appendText(read + "\n");
read = br.readLine();
}
} catch (IOException e) {
e.printStackTrace(); //To change body of catch statement use File | Settings | File Templates.
}
controller.appendText("Thread" + type + "started");
}
private final InputStream inputStream;
private String type;
}
private static Console console = null;
private ConsoleController controller;
private Stage stage;
private PrintStream printStream;
private PipedOutputStream customPipedOutputStream;
private PipedOutputStream errorPipedOutputStream;
private PipedOutputStream outPipedOutputStream;
private PipedInputStream customPipedInputStream;
private PipedInputStream errorPipedInputStream;
private PipedInputStream outPipedInputStream;
private Thread customOutputThread;
private Thread outOutputThread;
private Thread errorOutputThread;
}
但是结果只有:“启动控制台”,没有controller.appendText(“线程”+类型+“启动”)的结果代码>所以看起来这个线程没有启动。但是为什么呢?我认为您必须先加载表单,然后才能获取控制器实例
FXMLLoader loader = new FXMLLoader(this.getClass().getResource("Console.fxml"),resourceBundle);
Parent p = (Parent) loader.load()
controller = loader.getController();
Scene scene = new Scene(p);
有些东西是空的(我不知道是什么)。允许你去。如果您在Java 8中使用未捕获的异常处理程序集测试您的应用程序,您将能够获得更多信息(例如堆栈跟踪),这些信息可能有助于您调试问题。您可能还对我为JavaFX mini IDE项目创建的这个感兴趣。这可能不是最有效的处理方法,但对我来说很有效。@jewelsea:我使用了你的日志代码,并且明白我需要为控制台提供单独的线程。现在我有另一个问题-这些线程不想启动。