Issue with reading byte array

Question

I have a binary file to be read.I want to read the whole file into a byte array. But while doing so the values which are greater than 128 are read as negative values as we have Signedbyte in java(-127 to 128).
So I tried reading the bytes into the int array as shown in the below code.
int i = 0;
     int content[]= new int[(int)size];
     FileInputStream fstream = new FileInputStream(fileName);
     DataInputStream in = new DataInputStream(fstream);
     while(i<size)
     content= in.readUnsignedByte();
     i++;
The above function 'readUnsignedByte();' reads byte and stores it into an int array.....But since the file contains around 34000 bytes ....the loop runs 340000 times .....which is a performance hazard.
After googling for hours ....I could still not find any alternative ....
I want to read byte and want to store in int array but instead of loop, I want to read the file at once.
Or is there any way to implement Unsigned Byte in java so that I can read the entire file in byte array without corrupting the values which are greater than 128..
I have to deliver the code asap .....Please help me out with an alternative solution for this...
Thanks in advance....

Answer 1

Thanks for replying ......
Actually, I need to take the bytes into an array(int or byte array) with decimal values and further process these decimal values.......
but while reading the file into a byte array the decimal values get corrupted(in case when I read a number greater than 128) but in this case I am able to read the whole file at once(without using any loop) as done by the following code
     FileInputStream fstream = new FileInputStream(fileName);
     DataInputStream in = new DataInputStream(fstream);
     byte b[] = null;
     in.readFully(b);
and while reading the file in int array as done in the below code is inefficient as the number of times the loop runs is more than 34000..... please suggest me some alternative.
int i = 0;
     int content[]= new int[(int)size];
     FileInputStream fstream = new FileInputStream(fileName);     
     DataInputStream in = new DataInputStream(fstream);
     while(i<size)
               content= in.readUnsignedByte();
               i++;