暂停JavaFX程序，直到完成转换

import javafx.concurrent.Task;

public class ConversionTask extends Task<Void> {
    @Override
    protected Void call() throws Exception {
        // 执行转换过程的代码
        // ...
        return null;
    }
}

ConversionTask conversionTask = new ConversionTask();
Thread thread = new Thread(conversionTask);
thread.start();

public class ConversionTask extends Task<Void> {
    private boolean isConversionCompleted = false;
    
    public boolean isConversionCompleted() {
        return isConversionCompleted;
    }
    
    @Override
    protected Void call() throws Exception {
        // 执行转换过程的代码
        // ...
        
        isConversionCompleted = true;
        synchronized (this) {
            notifyAll(); // 唤醒等待的线程
        }
        
        return null;
    }
}

synchronized (conversionTask) {
    while (!conversionTask.isConversionCompleted()) {
        try {
            conversionTask.wait();
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }
}