Java - Math nextUp(double x) method

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Description

The Java Math nextUp(double d) returns the floating-point value adjacent to d in the direction of positive infinity. This method is semantically equivalent to nextAfter(d, Double.POSITIVE_INFINITY); however, a nextUp implementation may run faster than its equivalent nextAfter call. Special cases −

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

• If the argument is positive infinity, the result is positive infinity.

• If the argument is zero, the result is Double.MIN_VALUE

Declaration

Following is the declaration for java.lang.Math.nextUp() method

 public static double nextUp(double d) 

Parameters

d − starting floating-point value

Return Value

This method returns the adjacent floating-point value closer to positive infinity.

Exception

NA

Example: Getting Next Up for a Positive double Value

The following example shows the usage of Math nextUp() method for a positive value.

 package com.tutorialspoint; public class MathDemo { public static void main(String[] args) { // get a number double x = 154.28764; // print the next number for x System.out.println("Math.nextUp(" + x + ")=" + Math.nextUp(x)); } } 

Output

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

 Math.nextUp(154.28764)=154.28764000000004 

Example: Getting Next Up for a Zero double Value

The following example shows the usage of Math nextUp() method for a zero value.

 package com.tutorialspoint; public class MathDemo { public static void main(String[] args) { // get a number double x = 0.0; // print the next number for x System.out.println("Math.nextUp(" + x + ")=" + Math.nextUp(x)); } } 

Output

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

 Math.nextUp(0.0)=4.9E-324 

Example: Getting Next Up for a Negative double Value

The following example shows the usage of Math nextUp() method for negative value.

 package com.tutorialspoint; public class MathDemo { public static void main(String[] args) { // get a number double x = -154.28764; // print the next number for x System.out.println("Math.nextUp(" + x + ")=" + Math.nextUp(x)); } } 

Output

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

 Math.nextUp(-154.28764)=-154.28763999999998