# Java.lang.StrictMath.nextAfter() Method

## Description

The **java.lang.StrictMath.nextAfter(double start, double direction) **method returns the floating-point number adjacent to the first argument in the direction of the second argument. If both arguments compare as equal the second argument is returned.It include these cases:

- If either argument is a NaN, then NaN is returned.
- If both arguments are signed zeros,
*direction*is returned unchanged. - If start is ±Double.MIN_VALUE and direction has a value such that the result should have a smaller magnitude, then a zero with the same sign as start is returned.
- If start is infinite and direction has a value such that the result should have a smaller magnitude, Double.MAX_VALUE with the same sign as start is returned.
- If start is equal to ±Double.MAX_VALUE and direction has a value such that the result should have a larger magnitude, an infinity with same sign as start is returned.

## Declaration

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

public static double nextAfter(double start, double direction)

## Parameters

**start**-- This is the starting floating-point value**direction**-- This is the value indicating which of start's neighbors or start should be returned

## Return Value

This method returns the floating-point number adjacent to start in the direction of direction.

## Exception

**NA**

## Example

The following example shows the usage of java.lang.StrictMath.nextAfter() method.

package com.tutorialspoint; import java.lang.*; public class StrictMathDemo { public static void main(String[] args) { double d1 = 102.2d, d2 = 0.0d; /* returns the floating-point number adjacent to the first argument in the direction of the second argument */ double retval = StrictMath.nextAfter(d1, 9.2d); System.out.println("NextAfter = " + retval); /* returns the floating-point number adjacent to the first argument in the direction of the second argument */ retval = StrictMath.nextAfter(d2, 9.2d); System.out.println("NextAfter = " + retval); // returns 0 if both arguments is zero retval = StrictMath.nextAfter(d2, 0.0d); System.out.println("NextAfter = " + retval); } }

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

NextAfter = 102.19999999999999 NextAfter = 4.9E-324 NextAfter = 0.0