scjp (DataInputStream)

[Sham Grandhe]

54. Which of the following will compile without error?
A) File f = new File("/","autoexec.bat");
B) DataInputStream d = new DataInputStream(System.in);
C) OutputStreamWriter o = new OutputStreamWriter(System.out);
D) RandomAccessFile r = new RandomAccessFile("OutFile");
can a datainputstream take the system.in as an parameter, the datainputstream is high level, so it needs lowlevel stream, plz make this clear
shyam
[ Jess added a more descriptive title ]
[ January 22, 2004: Message edited by: Jessica Sant ]

[Ray Stojonic]

A DataInputStream is constructed with an InputStream object.
System.in is a BufferedInputStream, which extends FilterInputStream, which extends InputStream.
Therefore, System.in 'is-a' InputStream and can be used as a constructor argument for DataInputStream.

[Sham Grandhe]

hai Ray Stojonic,
thank you fr the kind information, I've been given the exact informaion that Ineed.