DecimalFormat setRoundingMode() method in Java

The setRoundingMode() method is a built-in method of the java.text.DecimalFomrat class in Java and is used to set the RoundingMode to be used with this DecimalFormat instance to round-off the decimal digits.

Syntax:

public void setRoundingMode(RoundingMode roundingMode)

Parameters: The function accepts a single parameter roundingMode which is the RoundingMode instance to be set for this DecimalFormat instance.

Return Value: The function does not returns any value.

Below is the implementation of the above function:

Program 1:

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// Java program to illustrate the
// setRoundingMode() method
  
import java.text.DecimalFormat;
import java.text.DecimalFormatSymbols;
import java.math.RoundingMode;
import java.util.Currency;
import java.util.Locale;
  
public class Main {
    public static void main(String[] args)
    {
  
        // Create the DecimalFormat Instance
        DecimalFormat deciFormat = new DecimalFormat();
  
        // Set the rounding mode as CEILING
        deciFormat.setRoundingMode(RoundingMode.CEILING);
  
        System.out.println(deciFormat.format(1234.5555));
    }
}

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Output:

1, 234.556

Program 2:

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// Java program to illustrate the
// setRoundingMode() method
  
import java.text.DecimalFormat;
import java.text.DecimalFormatSymbols;
import java.math.RoundingMode;
import java.util.Currency;
import java.util.Locale;
  
public class Main {
    public static void main(String[] args)
    {
  
        // Create the DecimalFormat Instance
        DecimalFormat deciFormat = new DecimalFormat();
  
        // Set the rounding mode as HALF_DOWN
        deciFormat.setRoundingMode(RoundingMode.HALF_DOWN);
  
        System.out.println(deciFormat.format(1234.5555));
    }
}

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Output:

1, 234.555

Reference: https://docs.oracle.com/javase/7/docs/api/java/text/DecimalFormat.html#setRoundingMode(java.math.RoundingMode)



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