# 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.

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
```
java_lang_strictmath.htm