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2010-06-01T05:03:14Z

1 версия

в 17:44, 31 мая 2010

2010-05-31T17:44:27Z

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== Format a number for a locale ==



<source lang="java">
import java.text.NumberFormat;
import java.util.Locale;
public class Main {
public static void main(String[] args) throws Exception {
NumberFormat formatter = NumberFormat.getNumberInstance(Locale.ITALY);
String number = formatter.format(123456789.12);
System.out.println("Number in Italy: " + number);
formatter = NumberFormat.getNumberInstance(Locale.JAPAN);
number = formatter.format(123456789.12);
System.out.println("Number in Japan: " + number);
}
}</source>



== Format a number with DecimalFormat ==



<source lang="java">
import java.text.DecimalFormat;
import java.text.NumberFormat;
public class Main {
public static void main(String[] args) {
double money = 123456789.12;
NumberFormat formatter = new DecimalFormat("#0.00");
System.out.println(money);
System.out.println(formatter.format(money));
}
}</source>



== Format for GERMAN locale ==



<source lang="java">
import java.text.NumberFormat;
import java.util.Locale;
public class Main {
public static void main(String[] argv) throws Exception {
Locale locale = Locale.GERMAN;
String string = NumberFormat.getNumberInstance(locale).format(-1234.56);
System.out.println(string);
}
}
//-1.234,56</source>



== Format for the default locale ==



<source lang="java">
import java.text.NumberFormat;
public class Main {
public static void main(String[] argv) throws Exception {
String string = NumberFormat.getNumberInstance().format(-1234.56);
System.out.println(string);
}
}
//-1,234.56</source>



== Formatting and Parsing a Locale-Specific Percentage ==



<source lang="java">
import java.text.NumberFormat;
import java.util.Locale;
public class Main {
public static void main(String[] argv) throws Exception {
// Format
Locale locale = Locale.CANADA;
String string = NumberFormat.getPercentInstance(locale).format(123.45);
}
}
// 12,345%</source>



== Formatting and Parsing Locale-Specific Currency ==



<source lang="java">
import java.text.NumberFormat;
import java.util.Locale;
public class Main {
public static void main(String[] argv) throws Exception {
// Format
Locale locale = Locale.GERMANY;
String string = NumberFormat.getCurrencyInstance(locale).format(123.45);
}
}
// 123,45 DM</source>



== Formatting a Number in Exponential Notation ==



<source lang="java">
The "E" symbol specifies that a number should be formatted in exponential notation.
E symbol separates the mantissa from the exponent.
E symbol must be followed by one or more "0" symbols.
The number of "0" symbols specifies the minimum number of digits used to display the exponent.</source>



== Parse a GERMAN number ==



<source lang="java">
import java.text.NumberFormat;
import java.util.Locale;
public class Main {
public static void main(String[] argv) throws Exception {
Number number = NumberFormat.getNumberInstance(Locale.GERMAN).parse("-1.234,56");
if (number instanceof Long) {
System.out.println("Long value");
} else {
System.out.println("Double value");
}
}
}</source>



== Parse a number for a locale ==



<source lang="java">
import java.text.NumberFormat;
import java.util.Locale;
public class Main {
public static void main(String[] args) throws Exception {
Number number = NumberFormat.getNumberInstance(Locale.JAPAN).parse("25,000.75");
if (number instanceof Long) {
System.out.println("Long value: " + number.longValue());
} else if (number instanceof Double) {
System.out.println("Double value: " + number.doubleValue());
}
}
}</source>



== Parse a number with NumberFormat and Locale.CANADA ==



<source lang="java">
import java.text.NumberFormat;
import java.util.Locale;
public class Main {
public static void main(String[] argv) throws Exception {
Number number = NumberFormat.getPercentInstance(Locale.CANADA).parse("123.45%");
// 1.2345
if (number instanceof Long) {
System.out.println("Long value");
} else {
System.out.println("Double value");
}
}
}</source>



== Parse number with NumberFormat and Locale ==



<source lang="java">
import java.text.NumberFormat;
import java.util.Locale;
public class Main {
public static void main(String[] argv) throws Exception {
Number number = NumberFormat.getCurrencyInstance(Locale.GERMANY).parse("$123.45");
if (number instanceof Long) {
System.out.println("Long value");
} else {
System.out.println("Double value");
}
}
}</source>



== Set format to two decimal places ==



<source lang="java">
import java.text.NumberFormat;
public class Main {
public static void main(String args[]) {
NumberFormat nf = NumberFormat.getInstance();
System.out.println("Default format: " + nf.format(1234567.678));
nf.setMaximumFractionDigits(2);
System.out.println("Format with two decimal places: " + nf.format(1234567.678));
}
}
/*
Default format: 1,234,567.678
Format with two decimal places: 1,234,567.68
*/</source>



== Use grouping to display a number ==



<source lang="java">
import java.text.NumberFormat;
public class Main {
public static void main(String args[]) {
NumberFormat nf = NumberFormat.getInstance();
System.out.println("Default format: " + nf.format(1234567.678));
nf.setGroupingUsed(false);
System.out.println("Format without groupings: " + nf.format(1234567.678));
}
}
/*
Default format: 1,234,567.678
Format without groupings: 1234567.678
*/</source>



== Use java.text.NumberFormat to format a currency value. ==



<source lang="java">
import java.text.NumberFormat;
public class Main {
public static void main(String[] argv) throws Exception {
NumberFormat nf = NumberFormat.getCurrencyInstance();
System.out.println("currency format: " + nf.format(1234.56) + " "
+ nf.format(-1234.56));
}
}
//currency format: $1,234.56 -$1,234.56</source>



== Using only 0"s to the left of E forces no decimal point ==



<source lang="java">
import java.text.DecimalFormat;
import java.text.NumberFormat;
public class Main {
public static void main(String[] argv) throws Exception {
NumberFormat formatter = new DecimalFormat("0E0");
String s = formatter.format(-1234.567);
System.out.println(s);
}
}
// -1E3</source>

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Admin: 1 версия

в 17:44, 31 мая 2010