单选题 下列代码行中哪一个允许在文件Date.txt中写当前的数据?
   A．FileOutputStream foutStream=new FileoutputStream("Date.txt");
   ObjectInputStream iStream=new ObjectInputStream(foutStream);
   Date curDate=new Date();
   oStream.writeObject((Date)curDate);
   B．FileoutputStream foutStream=new FileOutputStream("Date.txt");
   ObjectOutputStream oStream=new ObjectOutputStream(foutStream);
   Date curDate=new Date();
   oStream.writeObject((Date)curDate);
   C．ObjectOutputStream oStream=new ObjectOutputStream("Date.txt");
   Date curDate=new Date();
   oStream.writeObject((Date)curDate);
   D．FileOutputStream foutStream=new FileOutputStream("Date.txt");
   PrintStream oStream=new PrintStream(foutStream);
   Date curDate=new Date();
   oStream.println(curDate);