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DataIOTest.javaAPI DocExample1579Tue Dec 12 18:57:40 GMT 2000None

DataIOTest

public class DataIOTest extends Object

Fields Summary
Constructors Summary
Methods Summary
public static voidmain(java.lang.String[] args)


        // write the data out
        DataOutputStream out = new DataOutputStream(new
				   FileOutputStream("invoice1.txt"));

        double[] prices = { 19.99, 9.99, 15.99, 3.99, 4.99 };
        int[] units = { 12, 8, 13, 29, 50 };
        String[] descs = { "Java T-shirt",
			   "Java Mug",
			   "Duke Juggling Dolls",
			   "Java Pin",
			   "Java Key Chain" };
        
        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("invoice1.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("You've ordered " +
				    unit + " units of " +
				    desc + " at $" + price);
                total = total + unit * price;
            }
        } catch (EOFException e) {
        }
        System.out.println("For a TOTAL of: $" + total);
        in.close();