【单选题】

在下列程序的空白处，应填入的正确选项是(      )。 

Import java．io．*； 
Pulilc class ObjectStreamTest{
Publilc static void main(string args[])throws IOEx-
ception{
OhiectOutputStream oos=new OhjectOutputStream
(new FileOutputStream("serial．bin"))； 
Java．util．Date d=new Java．util．Date()； 
Oos (d)； 
ObjectInputStream ois=
new OhjectlnputStream(new FileOutputStream("serial． 
bin"))； 
try{
java．util．date restoredDate=
(Java．util．Date)ois．readObject()； 
System．out．println
("read object back from serial．bin file："
+restoredDate)； 
}
Catch(ClassNotFoundException cnf){
System．out．println("class not found")； 
}
}
 
A．WriterObject 
B．Writer
C．BufferedWriter 
D．writerObject