Read different data types from ObjectInputStream
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import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.EOFException;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.math.BigDecimal;
import java.util.Calendar;
public class ObjectStreams {
static final String dataFile = "invoicedata";
static final BigDecimal[] prices = { new BigDecimal("19.99"),
new BigDecimal("9.99"), new BigDecimal("15.99"), new BigDecimal("3.99"),
new BigDecimal("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,
ClassNotFoundException {
ObjectOutputStream out = null;
try {
out = new ObjectOutputStream(new BufferedOutputStream(
new FileOutputStream(dataFile)));
out.writeObject(Calendar.getInstance());
for (int i = 0; i < prices.length; i++) {
out.writeObject(prices[i]);
out.writeInt(units[i]);
out.writeUTF(descs[i]);
}
} finally {
out.close();
}
ObjectInputStream in = null;
try {
in = new ObjectInputStream(new BufferedInputStream(new FileInputStream(
dataFile)));
Calendar date = null;
BigDecimal price;
int unit;
String desc;
BigDecimal total = new BigDecimal(0);
date = (Calendar) in.readObject();
System.out.format("On %tA, %<tB %<te, %<tY:%n", date);
try {
while (true) {
price = (BigDecimal) in.readObject();
unit = in.readInt();
desc = in.readUTF();
System.out.format("You ordered %d units of %s at $%.2f%n", unit,
desc, price);
total = total.add(price.multiply(new BigDecimal(unit)));
}
} catch (EOFException e) {
}
System.out.format("For a TOTAL of: $%.2f%n", total);
} finally {
in.close();
}
}
}
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