Mega Code Archive
Reading from a Binary File with BufferedInputStream
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import java.io.BufferedInputStream;
import java.io.DataInputStream;
import java.io.EOFException;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.text.NumberFormat;
public class ReadBinaryFile {
public static void main(String[] args) throws Exception{
NumberFormat cf = NumberFormat.getCurrencyInstance();
File file = new File("product.dat");
DataInputStream in = new DataInputStream(new BufferedInputStream(new FileInputStream(file)));
boolean eof = false;
while (!eof) {
Product movie = readMovie(in);
if (movie == null)
eof = true;
else {
String msg = Integer.toString(movie.year);
msg += ": " + movie.title;
msg += " (" + cf.format(movie.price) + ")";
System.out.println(msg);
}
}
in.close();
}
private static Product readMovie(DataInputStream in) {
String title = "";
int year = 0;
double price = 0.0;
try {
title = in.readUTF();
year = in.readInt();
price = in.readDouble();
} catch (EOFException e) {
return null;
} catch (IOException e) {
System.out.println("I/O Error");
System.exit(0);
}
return new Product(title, year, price);
}
}
class Product {
public String title;
public int year;
public double price;
public Product(String title, int year, double price) {
this.title = title;
this.year = year;
this.price = price;
}
}
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