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Math round java

stackoverflow.com › questions › 13210491 › math-round-java

You could do something like this:

CopyDouble.valueOf(new DecimalFormat("#.##").format(
                                           centimeters)));  // 2 decimal-places

If you really wanted Math.round:

Copy(double)Math.round(centimeters * 100) / 100  // 2 decimal-places

You can have 3 decimal places by using 1000, 4 by using 10000 etc. I personally like the first option more.

Answer from arshajii on Stack Overflow

w3schools.com › java › ref_math_round.asp

Java Math round() Method

System.out.println(Math.round(0.60)); ...ntln(Math.round(-5.1)); System.out.println(Math.round(-5.9)); ... The round() method rounds a number to the nearest integer....

programiz.com › java-programming › library › math › round

Java Math round()

The round() method takes a single parameter. ... Note: The data type of the value should be either float or double. ... class Main { public static void main(String[] args) { // Math.round() method // value greater than 5 after decimal double a = 1.878;

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geeksforgeeks.org › java › java-math-round-method

Java Math round() Method - GeeksforGeeks

May 13, 2025 - Example 2: In this example, we will see how the round() method handles all the special cases. ... // Java program to demonstrate the working // of Math.round() method for special cases import java.lang.Math; class Geeks { // driver code public static void main(String args[]) { // float numbers float x = 4567.9874f; // find the closest long for these floats System.out.println(Math.round(x)); float y = -3421.134f; // find the closest long for these floats System.out.println(Math.round(y)); double p = Double.POSITIVE_INFINITY; // returns the Long.MAX_VALUE value when System.out.println(Math.round(p)); } }

stackoverflow.com › questions › 13210491 › math-round-java

Math round java - Stack Overflow

You could do something like this:

CopyDouble.valueOf(new DecimalFormat("#.##").format(
                                           centimeters)));  // 2 decimal-places

If you really wanted Math.round:

Copy(double)Math.round(centimeters * 100) / 100  // 2 decimal-places

You can have 3 decimal places by using 1000, 4 by using 10000 etc. I personally like the first option more.

In order to use the Math.round method you need to change only one line in your code:

Copydouble inches = Math.round(centimeters / 2.54);

If you want to keep 2 decimal digits you can use this:

Copydouble inches = Math.round( (centimeters / 2.54) * 100.0 ) / 100.0;

By the way I suggest you a better way to deal with these problems without rounding.

Your problem is only about displaying, so you don't need to change the model of the data, you can just change its display. To print the numbers in the format you need, you can let all your logic code like this and print the result in the following way:

Add this import at the beginning of your code:
```
Copyimport java.text.DecimalFormat;
```

Print the output in this way:

CopyDecimalFormat df = new DecimalFormat("#.##");
System.out.println(df.format(inches) + " Inch Is " +
                   df.format(centimeters) + " centimeters");

The string "#.##" is the way your number will be displayed (in this example with 2 decimal digits).

tutorialspoint.com › java › number_round.htm

Java - round() Method

public class Test { public static void main(String args[]) { double d = 100.675; double e = 100.500; float f = 100; float g = 90f; System.out.println(Math.round(d)); System.out.println(Math.round(e)); System.out.println(Math.round(f)); System.out.println(Math.round(g)); } } This will produce the following result − · 101 101 100 90 · java_numbers.htm ·

educative.io › answers › how-to-use-the-java-mathround-method

How to use the Java Math.round() method

If we want to round a decimal number up to specific decimal places, in this case 2 decimal places we multiply it by 100.0 , pass it to the Math.round() method and then divide it by 100.0. Note: To round a number to a specific decimal place, ...

Tutorial Gateway

tutorialgateway.org › java-math-round-function

Java Math.round Function

March 28, 2025 - First, we declared a variable of type Double and performed the round function directly on the expression. double a = Math.round(10.9666 - 14.9865 + 154.9852);

tutorialspoint.com › java › lang › math_round_float.htm

Java - Math round(float x) method

package com.tutorialspoint; public class MathDemo { public static void main(String[] args) { // get float numbers float x = -0.0f; float y = 0.0f; // find the long for these float number System.out.println("Math.round(" + x + ")=" + Math.round(x)); System.out.println("Math.round(" + y + ")=" + Math.round(y)); } } Let us compile and run the above program, this will produce the following result − · Math.round(-0.0)=0 Math.round(0.0)=0 · java_lang_math.htm ·

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codecademy.com › docs › java › math methods › .round()

Java | Math Methods | .round() | Codecademy

October 24, 2022 - The Math.round() method returns an int or long value that is closest to the number provided. ... Looking for an introduction to the theory behind programming? Master Python while learning data structures, algorithms, and more!

javatpoint.com › java-math-round-method

Java Math.round() method with Examples - Javatpoint

Java Math.round() method with Examples on abs(), min(), max(), avg(), round(), ceil(), floor(), pow(), sqrt(), sin(), cos(), tan(), exp() etc.

naukri.com › code360 › library › mathround-in-java

Java Math.round() Method Explained with Examples

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docs.vultr.com › java › standard-library › java › lang › Math › round

Java Math round() - Round Decimal Value | Vultr Docs

December 3, 2024 - Discover the nuances between rounding double and float datatypes and explore practical examples to solidify your understanding of this method. Declare a float variable. Apply the Math.round() method.

codegym.cc › java blog › java math › math round() method in java

Math round() method in Java

April 2, 2025 - Value argument could be float or double. The method returns the nearest int (in case of float value) or long (in case of double value) number to the argument, with ties rounding to positive infinity.

geeksforgeeks.org › java-math-round-method-example

Java Math round() method with Example - GeeksforGeeks

April 11, 2018 - Example 2: In this example, we will see how the round() method handles all the special cases. ... // Java program to demonstrate the working // of Math.round() method for special cases import java.lang.Math; class Geeks { // driver code public static void main(String args[]) { // float numbers float x = 4567.9874f; // find the closest long for these floats System.out.println(Math.round(x)); float y = -3421.134f; // find the closest long for these floats System.out.println(Math.round(y)); double p = Double.POSITIVE_INFINITY; // returns the Long.MAX_VALUE value when System.out.println(Math.round(p)); } }

baeldung.com › home › java › java numbers › how to round a number to n decimal places in java

How to Round a Number to N Decimal Places in Java | Baeldung

September 24, 2025 - In this quick tutorial, we’ll learn how to round a number to n decimal places in Java. Java provides two primitive types that we can use for storing decimal numbers: float and double. Double is the default type: ... However, we should never use either type for precise values like currencies. For that, and also for rounding, we can use the BigDecimal class. Let’s start with the core—Math.round()—this is typically the way to go.

scaler.com › home › topics › round off in java

Java Math.round() - Scaler Topics

April 19, 2024 - Example: 9.2 will be rounded off to 9. Note: The above trick is for positive numbers; it will be vice versa for negative numbers. ... Apart from using the Math class in Java, there are other ways to round a number. One of those methods is the format() method in Java.

labex.io › tutorials › java-rounding-floating-point-numbers-in-java-117452

Java Rounding Techniques | Programming Tutorials | LabEx

The following method takes a decimal ... number. public static double round(double num, int places) { double scale = Math.pow(10, places); double roundedNum = Math.round(num * scale) / scale; return roundedNum; } public static ...

beginnersbook.com › 2022 › 10 › java-math-round-method

Java Math.round() Method

public class JavaExample { public static void main(String[] args) { double d = 15.75; float f = -7.6f; // closest long value when rounding off double System.out.println(Math.round(d)); //closest int value when rounding off float System.out.println(Math.round(f)); } }

medium.com › @AlexanderObregon › rounding-numbers-with-math-round-math-floor-and-math-ceil-in-java-d201bbeb85e2

Java’s Math Rounding Methods Explained | Medium

March 7, 2025 - When rounding functions process ... Math.round() method follows a common rounding rule: if the decimal portion is 0.5 or greater, the number rounds up; otherwise, it rounds down....

codeahoy.com › java › Math-Round-method-JI_16

Java Math.round() with Examples | CodeAhoy

October 12, 2019 - Learn how to Math.round() in Java to round a decimal to its nearest integer.