NumberFormat is the abstract parent class for all the number formats. This class provides methods for formatting and parsing the numbers. Also it provides methods for finding locales for the number formats. It has the direct subclasses:

• ChoiceFormat and
• DecimalFormat 

Look at the below example for the different number formats. Here I have used the DecimalFormat class for formatting the numbers.

[code lang=”java”]
package javabeat.net.text;

import java.text.DecimalFormat;
import java.text.NumberFormat;
/**
* Format number with number format example
* @author krishna
*
*/
public class NumberFormatExample {

public static void main(String[] args) {
NumberFormat numberFormatter;
String number;

// Two decimal points
numberFormatter = new DecimalFormat("0.00");
number = numberFormatter.format(1234);
System.out.println(number);

// One decimal points
numberFormatter = new DecimalFormat("0.0");
number = numberFormatter.format(1234);
System.out.println(number);

// Two decimal points with nagative symbol
numberFormatter = new DecimalFormat("-0.00");
number = numberFormatter.format(1234);
System.out.println(number);

// Two decimal points with dollar ($) symbol
numberFormatter = new DecimalFormat("$0.00");
number = numberFormatter.format(1234);
System.out.println(number);

// Format of currency display with commas
numberFormatter = new DecimalFormat("$0,00,000");
number = numberFormatter.format(1234567);
System.out.println(number);

}

}
[/code]

Output

[code]
1234.00
1234.0
-1234.00
$1234.00
$1,234,567
[/code]

The above example shows the various formatting display with the NumberFormat object.