java - FileInputStream/DataInputStream -

so, got assignment make guessing game. program has generate number , user has guess. after users guesses right, program shows "highscore" (how many times user had guess before got right).

then should save highscore in text-file, saved on computer, , if restart computer not lost. struggeling how program supposed read file saved.

this "write-code":

try {     fileoutputstream write = new fileoutputstream      dataoutputstream out = new dataoutputstream(write);     out.writebytes(""+highscore);     write.close();} catch(ioexception ioexception ){     system.err.println( "could not write file" );     return;} 

which works fine, don't know how read again. "read-code": (i guessed, don't know if work)

try{     fileinputstream read = new fileinputstream     datainputstream in = new datainputstream(read);     in.readbytes(""+highscore);     joptionpane.showmessagedialog(null, "your highscore is" + highscore); catch(ioexception ioexception ){     system.err.println( "could not read file" );     return;} 

now, dont know if in.readbytes(""+highscore); command correct. guessed (i thought if out.writebytes(""+highscore); worked surely read has work too)

if readbytes correct command error :

the method readbytes(string) undefined type datainputstream

what supposed do?

some information: highscore , int.

for example, if highscore int, you'll want write int file. can with

dataoutputstream out = new dataoutputstream(write); out.writeint(highscore); 

and read with

datainputstream in = new datainputstream(read); int highscore = in.readint(); 

the class datainputstream not have readbytes(). why program not compile.

the whole point of dataiostream classes read , write

primitive java data types underlying [...] stream in machine-independent way.

so use methods corresponding data type of highscore.