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Demonstrate number and date internationalization
/*
* Copyright (c) 2000 David Flanagan. All rights reserved.
* This code is from the book Java Examples in a Nutshell, 2nd Edition.
* It is provided AS-IS, WITHOUT ANY WARRANTY either expressed or implied.
* You may study, use, and modify it for any non-commercial purpose.
* You may distribute it non-commercially as long as you retain this notice.
* For a commercial use license, or to purchase the book (recommended),
* visit http://www.davidflanagan.com/javaexamples2.
*/
import java.io.PrintWriter;
import java.text.DateFormat;
import java.text.NumberFormat;
import java.util.Date;
import java.util.Locale;
/**
* A partial implementation of a hypothetical stock portfolio class. We use it
* only to demonstrate number and date internationalization.
*/
public class Portfolio {
EquityPosition[] positions;
Date lastQuoteTime = new Date();
public Portfolio(EquityPosition[] positions, Date lastQuoteTime) {
this.positions = positions;
this.lastQuoteTime = lastQuoteTime;
}
public void print(PrintWriter out) {
// Obtain NumberFormat and DateFormat objects to format our data.
NumberFormat number = NumberFormat.getInstance();
NumberFormat price = NumberFormat.getCurrencyInstance();
NumberFormat percent = NumberFormat.getPercentInstance();
DateFormat shortdate = DateFormat.getDateInstance(DateFormat.MEDIUM);
DateFormat fulldate = DateFormat.getDateTimeInstance(DateFormat.LONG,
DateFormat.LONG);
// Print some introductory data.
out.println("Portfolio value at " + fulldate.format(lastQuoteTime)
+ ":");
out.println("Symbol Shares Purchased At " + "Quote Change");
// Display the table using the format() methods of the Format objects.
for (int i = 0; i < positions.length; i++) {
out.print(positions[i].name + " ");
out.print(number.format(positions[i].shares) + " ");
out.print(shortdate.format(positions[i].purchased) + " ");
out.print(price.format(positions[i].bought) + " ");
out.print(price.format(positions[i].current) + " ");
double change = (positions[i].current - positions[i].bought)
/ positions[i].bought;
out.println(percent.format(change));
out.flush();
}
}
static class EquityPosition {
String name; // Name of the stock.
int shares; // Number of shares held.
Date purchased; // When purchased.
double bought; // Purchase price per share
double current; // Current price per share
EquityPosition(String n, int s, Date when, double then, double now) {
name = n;
shares = s;
purchased = when;
bought = then;
current = now;
}
}
/**
* This is a test program that demonstrates the class
*/
public static void main(String[] args) {
// This is the portfolio to display. Note we use a deprecated
// Date() constructor here for convenience. It represents the year
// offset from 1900, and will cause a warning message when compiling.
EquityPosition[] positions = new EquityPosition[] {
new EquityPosition("XXX", 400, new Date(100, 1, 3), 11.90,
13.00),
new EquityPosition("YYY", 1100, new Date(100, 2, 2), 71.09,
27.25),
new EquityPosition("ZZZ", 6000, new Date(100, 4, 17), 23.37,
89.12) };
// Create the portfolio from these positions
Portfolio portfolio = new Portfolio(positions, new Date());
// Set the default locale using the language code and country code
// specified on the command line.
if (args.length == 2)
Locale.setDefault(new Locale(args[0], args[1]));
// Now print the portfolio
portfolio.print(new PrintWriter(System.out));
}
}
