Java – How to round double / float value to 2 decimal points

In Java, there are a few ways to round float or double to 2 decimal places

1. DecimalFormat

import java.math.RoundingMode;
import java.text.DecimalFormat;

public class DecimalFormat
{

private static DecimalFormat df = new DecimalFormat("0.00");

public static void main(String[] args) {

double input = 2105.1234;

System.out.println("salary : " + input);

// DecimalFormat, default is RoundingMode.HALF_EVEN
System.out.println("salary : " + df.format(input)); //1205.64

df.setRoundingMode(RoundingMode.DOWN);
System.out.println("salary : " + df.format(input)); //1205.63

df.setRoundingMode(RoundingMode.UP);
System.out.println("salary : " + df.format(input)); //1205.64

}
}

Output

salary : 2105.1234
salary : 2105.12
salary : 2105.12
salary : 2105.13

2. BigDecimal

import java.math.BigDecimal;
import java.math.RoundingMode;

public class BigDecimalExample {

public static void main(String[] args) {

double input = 3.1123435;
System.out.println("double : " + input);

BigDecimal bd = new BigDecimal(input).setScale(2, RoundingMode.HALF_UP);
double salary = bd.doubleValue();

System.out.println("salary : " + salary);

}

Output

double : 3.1123435
salary : 3.11

3. Math.round

public class MathExample {

public static void main(String[] args) {

double input = 1120.1235;

System.out.println("salary : " + input);

double salary = Math.round(input * 100.0) / 100.0;

System.out.println("salary : " + salary);

}

Output

salary : 1120.1235
salary : 1120.12

Java – How to round double / float value to 2 decimal points

Java – How to round double / float value to 2 decimal points

1. DecimalFormat

2. BigDecimal

3. Math.round

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