java - Binary I/O Classes (Summing all the integers in a binary data file) -

could please me through problem? i'm not binary i/o classes.

suppose binary data file named exercise 13b_1.dat has been created using writeint(int) in dataoutputstream. file contains unspecified number of integers. write program find sum of integers.

here simple solution.

fileinputstream fis = new fileinputstream("13b_1.dat"); datainputstream dis = new datainputstream(fis); int count = 0;  try {     while (true) {         dis.readint();         count++;     }  } catch (eofexception e) {}  system.out.println("there " + count + " integers."); 

for efficiency, can read in bunch of bytes , divide number of bytes four, since 1 integer 4 bytes.