NumberFormat setCurrency() method in Java with Examples

The setCurrency() method is a built-in method of the java.text.NumberFormat which sets the currency used by this number format when formatting currency values. This does not update the minimum or maximum number of fraction digits used by the number format. It overwrites the initially currency.

Syntax:

public void setCurrency(Currency currency)

Parameters: The function accepts a mandatory parameter currency which specifies the currency to be set up.

Return Value: The function returns nothing, hence has a return type void.

Errors and Exceptions: The function throws two types of exceptions which can be described as below:

  • UnsupportedOperationException: it is thrown if the number format class doesn’t implement currency formatting
  • NullPointerException it is thrown if currency is null

Below is the implementation of the above function:

Program 1:

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// Java program to implement
// the above function
  
import java.text.NumberFormat;
import java.util.Locale;
import java.util.Currency;
  
public class Main {
    public static void main(String[] args)
        throws Exception
    {
  
        NumberFormat nF
            = NumberFormat.getNumberInstance();
  
        // Initially currency
        System.out.println("Initially Currency: "
                           + nF.getCurrency());
  
        // Currency set to US
        nF.setCurrency(Currency
                           .getInstance(Locale.CANADA));
  
        // Print the currency
        System.out.println("Currency set as: "
                           + nF.getCurrency());
    }
}

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Output:

Initially Currency: USD
Currency set as: CAD

Program 2:

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// Java program to implement
// the above function
  
import java.text.NumberFormat;
import java.util.Locale;
import java.util.Currency;
  
public class Main {
    public static void main(String[] args)
        throws Exception
    {
        try {
  
            NumberFormat nF
                = NumberFormat.getNumberInstance();
  
            // Initially currency
            System.out.println("Initially Currency: "
                               + nF.getCurrency());
  
            // Currency set to US
            nF.setCurrency(null);
  
            // Print the currency
            System.out.println("Currency set as: "
                               + nF.getCurrency());
        }
        catch (Exception e) {
            System.out.println("Exception is: " + e);
        }
    }
}

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Output:

Initially Currency: USD
Exception is: java.lang.NullPointerException

Reference: https://docs.oracle.com/javase/10/docs/api/java/text/NumberFormat.html#setCurrency(java.util.Currency)



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