Java Display double in 2 decimal places

In Java, there are few ways to display double in 2 decimal places.

1. DecimalFormat

package com.mkyong;
import java.math.RoundingMode;
import java.text.DecimalFormat;
public class DecimalExample {
    private static DecimalFormat df2 = new DecimalFormat("#.##");
    public static void main(String[] args) {
        double input = 3.14159265359;
        System.out.println("double : " + input);
        System.out.println("double : " + df2.format(input));    //3.14
        // DecimalFormat, default is RoundingMode.HALF_EVEN
        df2.setRoundingMode(RoundingMode.DOWN);
        System.out.println("\ndouble : " + df2.format(input));  //3.14
        df2.setRoundingMode(RoundingMode.UP);
        System.out.println("double : " + df2.format(input));    //3.15

Output

double : 3.14159265359
double : 3.14
double : 3.14
double : 3.15

2. String.format

package com.mkyong;
public class StringFormatExample {
    public static void main(String[] args) {
        double input = 3.14159265359;
        System.out.println("double : " + input);
        System.out.println("double : " + String.format("%.2f", input));
        System.out.format("double : %.2f", input);

Output

double : 3.14159265359
double : 3.14
double : 3.14

3. BigDecimal

package com.mkyong;
import java.math.BigDecimal;
import java.math.RoundingMode;
public class BigDecimalExample {
    public static void main(String[] args) {
        double input = 3.14159265359;
        System.out.println("double : " + input);
        BigDecimal bd = new BigDecimal(input).setScale(2, RoundingMode.HALF_UP);
        double newInput = bd.doubleValue();
        System.out.println("double : " + newInput);

Output

double : 3.14159265359
double : 3.14