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DataInputStream/DataOutputStream

i dont understand the use of DataInputStream/DataoutputStream. It is called , these classes are usued for primitive types(int, char etc).

means what ? suppose i have a file which contains like below..

12 A B C 1245

so these are primitive data, because these are ints, chars READABLE things, right ? so i CAN use datainputstream to read these data ? but same thing i could do it using a FIleReader!!....is not it ?

so , dont u think DataInputStream/DataoutputStream is a redundant class ? (bocz FileReader/ FileWriter can do theirs job !!)

ASKER CERTIFIED SOLUTION

Mick Barry

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cofactor

ASKER

>...No it is for writing primitives in binary format

plz explain a little bit.

Mick Barry

eg. writeInt(1) does not write the character '1' to the file it writes the binary representation (4 bytes) of the integer 1

cofactor

ASKER

>eg. writeInt(1) does not write the character '1' to the file >it writes the binary representation (4 bytes) of the >integer 1

ohh. that means, it is taking a primitive param (here integer 1 ) but outputing a binary result.

what will happen when it will use readInt() ?

Filereader,Filewriter does txt--->txt conversion , so here is the difference ! right ?

Mick Barry

> what will happen when it will use readInt() ?

It will read the next 4 bytes and interpret them as an integer

> Filereader,Filewriter does txt--->txt conversion , so here is the difference ! right ?

sort of, you actually write chars to a writer