Java - StrictMath round(double x) method

---

---

Description

The Java StrictMath round(double a) returns the closest long to the argument. The result is rounded to an integer by adding 1/2, taking the floor of the result, and casting the result to type long. Special cases −

• If the argument is NaN, the result is 0.

• If the argument is negative infinity or any value less than or equal to the value of Long.MIN_VALUE, the result is equal to the value of Long.MIN_VALUE.

• If the argument is positive infinity or any value greater than or equal to the value of Long.MAX_VALUE, the result is equal to the value of Long.MAX_VALUE.

Declaration

Following is the declaration for java.lang.StrictMath.round() method

 public static long round(double a) 

Parameters

a − a floating-point value to be rounded to a long.

Return Value

This method returns the value of the argument rounded to the nearest long value.

Exception

NA

Example: Getting a Rounded long for a Positive double Value

The following example shows the usage of StrictMath round() method to get a long value for a positive double value.

 package com.tutorialspoint; public class StrictMathDemo { public static void main(String[] args) { // get a double number double x = 1654.9874; // find the closest long for this double number System.out.println("StrictMath.round(" + x + ")=" + StrictMath.round(x)); } } 

Output

Let us compile and run the above program, this will produce the following result −

 StrictMath.round(1654.9874)=1655 

Example: Getting a Rounded long for a Negative double Value

The following example shows the usage of StrictMath round() method to get a long value for a negative double value.

 package com.tutorialspoint; public class StrictMathDemo { public static void main(String[] args) { // get a double number double x = -9765.134; // find the closest long for this double number System.out.println("StrictMath.round(" + x + ")=" + StrictMath.round(x)); } } 

Output

Let us compile and run the above program, this will produce the following result −

 StrictMath.round(-9765.134)=-9765 

Example: Getting a Rounded long for a Zero double Value

The following example shows the usage of StrictMath round() method to get a long value for a zero double values.

 package com.tutorialspoint; public class StrictMathDemo { public static void main(String[] args) { // get double numbers double x = -0.0; double y = 0.0; // find the long for these double number System.out.println("StrictMath.round(" + x + ")=" + StrictMath.round(x)); System.out.println("StrictMath.round(" + y + ")=" + StrictMath.round(y)); } } 

Output

Let us compile and run the above program, this will produce the following result −

 StrictMath.round(-0.0)=0 StrictMath.round(0.0)=0