In Java, How Can A Number Be Rounded To A Specific Number Of Decimal Places?

To round a number to n decimal places in Java, you can use the DecimalFormat class. Here is an example:

import java.text.DecimalFormat;

public class Main {
    public static void main(String[] args) {
        double number = 3.14159265359;
        int decimalPlaces = 2;

        // Create the decimal format pattern
        String pattern = "#.";
        for (int i = 0; i < decimalPlaces; i++) {
            pattern += "#";

        // Create the decimal format instance
        DecimalFormat decimalFormat = new DecimalFormat(pattern);

        // Format the number
        String roundedNumber = decimalFormat.format(number);

        // Print the rounded number

In this example, the number is rounded to 2 decimal places. The DecimalFormat class is used to create a pattern that defines the format of the rounded number. The pattern is created based on the desired number of decimal places (n). The format() method of DecimalFormat is then used to format the number according to the pattern. Finally, the rounded number is printed.



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