Java: Show only n digits after decimal point

Approach 1: Using DecimalFormat.format class

For example, below statements print 2 digits after the decimal point.

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

double d1 = 1234567 / 123.0;

String formattedNumber = decimalFormat.format(d1);

App.java

package com.sample.app;

import java.io.IOException;
import java.text.DecimalFormat;

public class App {

 public static void main(String args[]) throws IOException {
  DecimalFormat decimalFormat = new DecimalFormat(".##");
  double d1 = 1234567 / 123.0;

  String formattedNumber = decimalFormat.format(d1);
  System.out.println("formattedNumber : " + formattedNumber);
  System.out.println("Actual Number : " + d1);

 }
}

Output

formattedNumber : 10037.13

Actual Number : 10037.130081300813

Approach 2: Using String.format

Below statements print 2 digits after the decimal point.

double d1 = 1234567 / 123.0;

String formattedNumber = String.format("%.2f", d1);

App.java

package com.sample.app;

import java.io.IOException;

public class App {

 public static void main(String args[]) throws IOException {

  double d1 = 1234567 / 123.0;
  String formattedNumber = String.format("%.2f", d1);
  
  System.out.println("formattedNumber : " + formattedNumber);
  System.out.println("Actual Number : " + d1);

 }
}

Output

formattedNumber : 10037.13

Actual Number : 10037.130081300813

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