7 ways to print float to 2 decimal places in java

In this post, we will see how to print float to 2 decimal places in java.
There are multiple ways to how to print float to 2 decimal places in java.
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1. Using System.out.printf

In case, if you just want to print float to 2 decimal places, this is best method. You can simply use System.out.printf with format %.2f.
Here is an example:

package org.arpit.java2blog.entry;

public class PrintfFloatMain {

    public static void main(String[] args) {
        float f= 1.232312f;

        // Print float to 2 decimal places using printf
        System.out.printf("Float upto 2 decimal places: %.2f",f);
    }
}

Output:

2. Using String’s format() method

String class also provide static method format() which you can use to print float to 2 decimal places in java. This works similar to System.out.printf.
Here is an example:

package org.arpit.java2blog.entry;

public class StringFormatPrintFloat {

    public static void main(String[] args) {
        float f= 1.232312f;
        System.out.println("Float upto 2 decimal places: "+String.format("%.2f",f));
    }
}

Output:

3. Using Formatter

java.util.Formatter class provides format() method which you can use to print float to 2 decimal places in java. This works similar to System.out.printf
Here is an example:

package org.arpit.java2blog.entry;

import java.util.Formatter;

public class FormatterPrintFloat {

    public static void main(String[] args) {
        float f= 1.232312f;

        Formatter fm = new Formatter();
        fm.format("%.2f", f);
        //  Print float to 2 decimal places using Formatter
        System.out.println("Float upto 2 decimal places: " + fm.toString());
    }
}

Output:

4. Using NumberFormat

You can also use NumberFormat‘s setMaximumFractionDigits() to put constraint on number of decimal places and use its format() method to display double to 2 decimal places.
Here is an example:

package org.arpit.java2blog.entry;

import java.text.NumberFormat;
import java.util.Formatter;

public class NumberFormatPrintFloat {

    public static void main(String[] args) {
        float f1 = 1.008f;
        float f2 = 1.868f;

        NumberFormat numberFormat= NumberFormat.getInstance();
        numberFormat.setMaximumFractionDigits(2);

        // Print float to 2 decimal places using NumberFormat
        System.out.println("Float f1 upto 2 decimal places: " +numberFormat.format(f1));
        System.out.println("Float f2 upto 2 decimal places: " +numberFormat.format(f2));

    }
}

Output:

5. Using BigDecimal

You can convert float to BigDecimal and use BigDecimal‘s setScale() method to print float to 2 decimal places.
Here is an example:

package org.arpit.java2blog.entry;

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

public class BigDecimalDisplayFloat {
    public static void main(String[] args) {

        float f= 1.232312f;
        BigDecimal bd=new BigDecimal(f).setScale(2,RoundingMode.HALF_DOWN);

        // Print float to 2 decimal places using BigDecimal
        System.out.println("Float upto 2 decimal places: "+bd.doubleValue());

        // You can use RoundingMode to round double Up or Down
        BigDecimal bdDown=new BigDecimal(f).setScale(2,RoundingMode.DOWN);
        System.out.println("Float upto 2 decimal places - RoundingMode.DOWN: "+bdDown.doubleValue());

        BigDecimal bdUp=new BigDecimal(f).setScale(2,RoundingMode.UP);
        System.out.println("Float upto 2 decimal places - RoundingMode.UP: "+bdUp.doubleValue());
    }
}

Output:

6. Using DecimalFormat

You can provide formatting pattern to DecimalFormat class to print float to 2 decimal places. Here, RoundingMode can be used to control rounding behavior.
Here is an example:

package org.arpit.java2blog.entry;

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

public class DecimalFormatPrintFloat {
    public static void main(String[] args) {

        DecimalFormat df=new DecimalFormat("#.##");

        float f= 1.232312f;

        // Print float to 2 decimal places using DecimalFormat
        System.out.println("Float upto 2 decimal places: "+df.format(f));

        // Use RoundingMode to up and down the float
        df.setRoundingMode(RoundingMode.DOWN);
        System.out.println("Float upto 2 decimal places using RoundingMode.DOWN: "+df.format(f));

        df.setRoundingMode(RoundingMode.UP);
        System.out.println("Float upto 2 decimal places using RoundingMode.UP: "+df.format(f));
    }
}

Output:

7. Using Apache common library

You can use Precision‘s round() method to display double to 2 decimal places. Precision class belongs to Apache common’s common-math3 library.
You need to add following dependency to pom.xml.

    org.apache.commons
    commons-math3
    3.6.1

You can change 3.6.1 to latest version if you want from here.
Here is an example:

package org.arpit.java2blog.entry;

import org.apache.commons.math3.util.Precision;

public class ApacheCommonPrecisionFloatMain {

    public static void main(String[] args) {
        float f= 1.232312f;
        // Print float to 2 decimal places using Apache common Precision
        System.out.println("Print float upto 2 decimal places: " + Precision.round(f,2));
    }
}

Output:

That’s all about How to print float to 2 decimal places