a form with two textfields, two buttons, click one button to locate the directory path and fill it into a textfield, and click another button to start to find the enum .class file from the directory path and show the enum class name into textfield, using javafx structure and show me the java code
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ChatGPT回答如下：
import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.TextField;
import javafx.scene.layout.HBox;
import javafx.stage.DirectoryChooser;
import javafx.stage.Stage;
import java.io.File;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.stream.Stream;
public class EnumFinder extends Application {
private TextField directoryPathTextField;
private TextField enumClassNameTextField;
public static void main(String[] args) {
launch(args);
}
@Override
public void start(Stage primaryStage) {
directoryPathTextField = new TextField();
Button directoryPathButton = new Button("Select Directory");
directoryPathButton.setOnAction(e -> {
DirectoryChooser directoryChooser = new DirectoryChooser();
below class is worked not ok under high flow pressure, please find the bug and fix for me :
public class SepI18nDataFactory {
/** 配置文件数据服务 */
public static ISepI18nDataService dataService;
/** 构建数据服务
* @param dataType
* @return
*/
public static ISepI18nDataService buildDataService(SepI18nDataType dataType, SepI18nLanguageType languageType) {
//按照数据类型判断
switch (dataType) {
//从ducc中构建多语言服务 case DUCC: return getInstance(languageType, x -> new SepI18nDuccDataService(x));
//从mysql中构建多语言服务 case MYSQL: return getInstance(languageType, x -> new SepI18nMysqlDataService(x));
//从本地配置中构建多语言服务 case CONFIG: return getInstance(languageType, x -> new SepI18nConfigDataService(x));
//空数据服务，兜底逻辑 default: return getInstance(languageType, x -> new SepI18nEmptyDataService(x));
}
}
/** 高并发下实例创建管控
* @param languageType
* @param callback
* @return
*/
private static ISepI18nDataService getInstance(SepI18nLanguageType languageType, Function callback) {
if (dataService == null) {
synchronized (SepI18nDataFactory.class) {
if (dataService == null) {
dataService = callback.apply(languageType);
}
}
}
return dataService;
}
}
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ChatGPT回答如下：
It looks like the bug is in the getInstance() method. The dataService variable is not being synchronized, which can cause issues with concurrent access. To fix this, you can add a synchronized block around the code that checks and sets the dataService variable. This will ensure that only one thread can access the variable at a time.
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很明显，一针见血的指出了高并发下存在的问题。
Sample2: 自定义锁bug
随便写了个基于AQS锁框架的自定义锁，代码如下：
class SepSync extends AbstractQueuedSynchronizer {
@Override
protected boolean tryAcquire(int arg) {
if (compareAndSetState(0, 1)) {
setExclusiveOwnerThread(Thread.currentThread());
return true;
}
return false;
}
@Override
protected boolean tryRelease(int arg) {
if (getState() == 0) {
throw new IllegalMonitorStateException();
}
setExclusiveOwnerThread(null);
setState(0);
return true;
}
public void lock() {
acquire(1);
}
public void unlock() {
release(1);
}
}
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ChatGPT问题如下（大意是帮忙看下锁写的有没有问题）：
below is the lock class, please find the bug and fix it for me :
class SepSync extends AbstractQueuedSynchronizer {
@Override protected boolean tryAcquire(int arg) {
if (compareAndSetState(0, 1)) {
setExclusiveOwnerThread(Thread.currentThread());
return true;
}
return false;
}
@Override
protected boolean tryRelease(int arg) {
if (getState() == 0) {
throw new IllegalMonitorStateException();
}
setExclusiveOwnerThread(null);
setState(0);
return true;
}
public void lock() {
acquire(1);
}
public void unlock() {
release(1);
}
}
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ChatGPT回答如下：
The bug in the above code is that the tryRelease() method does not check if the current thread is the exclusive owner thread before releasing the lock. This can lead to a situation where the lock is released by a thread that does not own it.
To fix this bug, the tryRelease() method should be modified to check if the current thread is the exclusive owner thread before releasing the lock. The modified code should look like this:
