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Format currency with Java MessageFormat
To format message with currency fillers in Java, we use the MessageFormat class. The MessageFormat class gives us a way to produce concatenated messages which are not dependent on the language. The MessageFormat class extends the Serializable and Cloneable interfaces.
Declaration −The java.text.MessageFormat class is declared as follows −
public class MessageFormat extends Format
The MessageFormat.format(pattern, params) method formats the message and fills in the missing parts using the objects in the params array matching up the argument numbers and the array indices.
The format method has two arguments, a pattern and an array of arguments. The pattern contains placeholder in {} curly braces which have a index that indicate the position in the array where the value of the argument is stored, a number argument indicating that the filler is a number and a currency parameter indicating that the number is a currency representing money. They are as follows −
MessageFormat.format("{0,number,currency} loss and {1,number,currency} profit", obj);Let us see a program to format the message with currency fillers −
Example
import java.text.MessageFormat;
public class Example {
public static void main(String[] args) throws Exception {
Object[] obj = new Object[] { new Float(23.21), new Float(56.86) };
String str = MessageFormat.format("{0,number,currency} loss and {1,number,currency} profit", obj);
System.out.println(str);
}
}Output
$23.21 loss and $56.86 profit
The currency parameter in the placeholder adds an extra dollar sign to denote currency −
String str = MessageFormat.format("{0,number,currency} loss and {1,number,currency} profit", obj);It will give the subsequent output −
$23.21 loss and $56.86 profit
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