Java Math.nextDown() method with Examples

by Online Tutorials Library July 22, 2022

Java Math.nextDown() method

The java.lang.Math.nextDown() is a built-in math method in java. It returns the floating-point value adjacent to the user specified parameter (d) in the direction of negative infinity. This method is equivalent to nextAfter(d, Double.NEGATIVE_INFINITY) method.

Implementation of nextDown may run faster than its equivalent nextAfter call.

Syntax

Parameter

Return

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

If the argument is a NaN, this method will return NaN.
If the argument is Zero and we are dealing with double, this method will return Double.MIN_VALUE.
If the argument is Zero and we are dealing with float, this method will return Float.MIN_VALUE.
If the argument is Negative Infinity, this method will return Negative Infinity.

Example 1

  public class NextDownExample1  {      public static void main(String[] args)       {          float x = 0.0f / 0;          // Input NaN, Output NaN          System.out.println(Math.nextDown(x));      }  }  

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Output:

NaN

Example 2

  public class NextDownExample2  {      public static void main(String[] args)       {          double x = 744.93;          // Input double value, Output adjacent floating-point          System.out.println(Math.nextDown(x));      }  }  

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Output:

744.9299999999998

Example 3

  public class NextDownExample3   {      public static void main(String[] args)       {          float a = 328.7f;          // Input float value, Output adjacent floating-point          System.out.println(Math.nextDown(a));      }  }  

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Output:

328.69998

Example 4

  public class NextDownExample4   {      public static void main(String[] args)       {          float x = 0.0f;          // Input zero, Output Float.MIN_VALUE for float          System.out.println(Math.nextDown(x));      }  }  

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Output:

-1.4E-45

Example 5

  public class NextDownExample5  {      public static void main(String[] args)       {          double x = 0.0;          // Input zero, Output Double.MIN_VALUE for double          System.out.println(Math.nextDown(x));      }  }  

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Output:

-4.9E-324

Example 6

  public class NextDownExample6  {      public static void main(String[] args)       {          Float x = -1.0f / 0;          // Input negative infinity, Output negative infinity          System.out.println(Math.nextDown(x));      }  }  

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Output:

-Infinity

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Java Math.nextDown() method with Examples

Java Math.nextDown() method

Syntax

Parameter

Return

Example 1

Example 2

Example 3

Example 4

Example 5

Example 6

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