Mega Code Archive
IO demo
<![CDATA[
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 DataIODemo1 {
public static void main(String[] args) throws IOException {
DataOutputStream out = new DataOutputStream(new FileOutputStream(
"rntsoft.txt"));
double[] prices = { 19.99, 9.99, 15.99, 3.99, 4.99 };
int[] units = { 12, 8, 13, 29, 50 };
String[] descs = { "Java", "Source ", "and",
"Support."};
for (int i = 0; i < prices.length; i++) {
out.writeDouble(prices[i]);
out.writeChar('\t');
out.writeInt(units[i]);
out.writeChar('\t');
out.writeChars(descs[i]);
out.writeChar('\n');
}
out.close();
// read it in again
DataInputStream in = new DataInputStream(new FileInputStream(
"rntsoft.txt"));
double price;
int unit;
String desc;
double total = 0.0;
try {
while (true) {
price = in.readDouble();
in.readChar(); // throws out the tab
unit = in.readInt();
in.readChar(); // throws out the tab
desc = in.readLine();
System.out.println( unit );
System.out.println( desc );
System.out.println( desc );
total = total + unit * price;
}
} catch (EOFException e) {
}
in.close();
}
}
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