Java 中的 StrictMath nextDown()方法
原文:https://www . geesforgeks . org/strict math-next down-method-in-Java/
下一个数字
nextDown(double num) 是 Java 中 StrictMath 类的内置方法，用于获取负无穷大方向上与 num 相邻的浮点值。当参数是 NaN 时，结果是 NaN。当数为负无穷大时，返回负无穷大。结果是双倍。参数为零时的最小值。nextDown()方法相当于 nextAfter( num，Double。NEGATIVE_INFINITY )但是 nextDown()比它的等价的 nextAfter 调用运行得更快。
语法:
public static double nextDown(*double num*)
参数:该方法接受双类型的一个参数数，该参数为起始浮点值。
返回值:该方法返回更接近负无穷大的相邻浮点值。
示例:
Input: num = 7.16
Output: 7.159999999999999
下面的程序说明了 nextDown()方法:
程序 1:
Java 语言(一种计算机语言，尤用于创建网站)
// Java program to illustrate the
// Java.lang.StrictMath.nextDown() Method
import java.lang.*;
public class Geeks {
public static void main(String[] args)
{
// Get a double number
double num1 = 62.9;
// Get the floating-point value adjacent to num
double nextDown_Value = StrictMath.nextDown(num1);
// Print the result
System.out.println("The Next down value of "
+ num1 + " = " + nextDown_Value);
// Get a double number
double num2 = 16.6226;
// Get the floating-point value adjacent to num
nextDown_Value = StrictMath.nextDown(num2);
// Print the result
System.out.println("The Next down value of "
+ num2 + " = " + nextDown_Value);
// Get a double number
double num3 = 0.0;
// Get the floating-point value adjacent to num
nextDown_Value = StrictMath.nextDown(num3);
// Print the result
System.out.println("The Next down value of "
+ num3 + " = " + nextDown_Value);
}
}
Output:
The Next down value of 62.9 = 62.89999999999999
The Next down value of 16.6226 = 16.622599999999995
The Next down value of 0.0 = -4.9E-324
下一个向下(浮点数)
nextDown(float num) 是 Java 中 StrictMath 类的内置方法，用于获取负无穷大方向上与 num 相邻的浮点值。当参数是 NaN 时，结果是 NaN。当数为负无穷大时，返回负无穷大。结果是“浮动”。参数为零时的最小值。nextDown()方法相当于 nextAfter( num，Float。NEGATIVE_INFINITY )但是 nextDown()比它的等价的 nextAfter 调用运行得更快。
语法:
public static float nextDown(*float num*)
参数:该方法接受一个浮点类型的参数数，该参数为起始浮点值。
返回值:该方法返回更接近负无穷大的相邻浮点值。
示例:
Input: num = 1.2f
Output: 1.1999999
下面的程序说明了方法:
程序 1:
Java 语言(一种计算机语言，尤用于创建网站)
// Java program to illustrate the
// Java.lang.StrictMath.nextDown() Method
import java.lang.*;
public class Geeks {
public static void main(String[] args)
{
// Get a float number
float num1 = 16.622f;
// Get the floating-point value adjacent to num
float nextDown_Value = StrictMath.nextDown(num1);
// Print the result
System.out.println("The Next down value of "
+ num1 + " = " + nextDown_Value);
// Get a float number
float num2 = 91.11f;
// Get the floating-point value adjacent to num
nextDown_Value = StrictMath.nextDown(num2);
// Print the result
System.out.println("The Next down value of "
+ num2 + " = " + nextDown_Value);
// Get a float number
float num3 = 0.0f;
// Get the floating-point value adjacent to num
nextDown_Value = StrictMath.nextDown(num3);
// Print the result
System.out.println("The Next down value of "
+ num3 + " = " + nextDown_Value);
}
}
Output:
The Next down value of 16.622 = 16.621998
The Next down value of 91.11 = 91.10999
The Next down value of 0.0 = -1.4E-45
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