Mega Code Archive
Read different data types from DataInputStream
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/*
* Copyright (c) 1995 - 2008 Sun Microsystems, Inc. All rights reserved.
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
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import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.EOFException;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
public class DataStreams {
static final String dataFile = "invoicedata";
static final double[] prices = { 19.99, 9.99, 15.99, 3.99, 4.99 };
static final int[] units = { 12, 8, 13, 29, 50 };
static final String[] descs = { "Java T-shirt", "Java Mug",
"Duke Juggling Dolls", "Java Pin", "Java Key Chain" };
public static void main(String[] args) throws IOException {
DataOutputStream out = null;
try {
out = new DataOutputStream(new BufferedOutputStream(new FileOutputStream(
dataFile)));
for (int i = 0; i < prices.length; i++) {
out.writeDouble(prices[i]);
out.writeInt(units[i]);
out.writeUTF(descs[i]);
}
} finally {
out.close();
}
DataInputStream in = null;
double total = 0.0;
try {
in = new DataInputStream(new BufferedInputStream(new FileInputStream(
dataFile)));
double price;
int unit;
String desc;
try {
while (true) {
price = in.readDouble();
unit = in.readInt();
desc = in.readUTF();
System.out.format("You ordered %d units of %s at $%.2f%n", unit,
desc, price);
total += unit * price;
}
} catch (EOFException e) {
}
System.out.format("For a TOTAL of: $%.2f%n", total);
} finally {
in.close();
}
}
}
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