Java StrictMath rint()用法及代码示例

rint()是Java中StrictMath类的内置方法，用于获取值最接近参数且等于整数的double值。它返回一个整数值，当作为整数的两个double值均相等地接近给定参数的值时，它甚至是整数。当参数值已经等于整数时，它返回与参数相同的值；当参数为NaN或无穷大或正零或负零时，它返回与参数相同的值。

用法:

public static double rint(double num)

参数：该方法接受要使用此方法转换的双精度类型的单个参数num。

返回值：该方法返回等于整数的最接近的浮点值。

例子：

Input: num =72.2
Output: 72.0

以下示例程序旨在说明rint()方法：

示例1:

// Java praogram to illustrate the 
// java.lang.StrictMath.rint() 
  
import java.lang.*; 
  
public class Geeks { 
    public static void main(String[] args) 
    { 
  
        // Get a double number 
        double num1 = 87.1; 
  
        // Convert the double number using rint() method 
        double rint_Value = StrictMath.rint(num1); 
  
        // Print the result 
        System.out.println(" The Integer value closest to "
                         + num1 + " = " + rint_Value); 
  
        // Get a double number 
        double num2 = 65.9; 
  
        // Convert the double number using rint() method 
        rint_Value = StrictMath.rint(num1); 
  
        // Print the result 
        System.out.println(" The Integer value closest to "
                         + num1 + " = " + rint_Value); 
    } 
}

输出：

The Integer value closest to 87.1 = 87.0 
The Integer value closest to 87.1 = 87.0

示例2:

// Java praogram to illustrate the 
// java.lang.StrictMath.rint() 
  
import java.lang.*; 
  
public class Geeks { 
  
    public static void main(String[] args) 
    { 
  
        // Get a double number 
        double num1 = -65.5; 
  
        // Convert the double number using rint() method 
        double rint_Value = StrictMath.rint(num1); 
  
        // Print the result 
        System.out.println(" The Integer value closest to "
                         + num1 + " = " + rint_Value); 
  
        // Get a double number 
        double num2 = -42.7; 
  
        // Convert the double number using rint() method 
        rint_Value = StrictMath.rint(num1); 
  
        // Print the result 
        System.out.println(" The Integer value closest to "
                         + num1 + " = " + rint_Value); 
    } 
}

输出：

The Integer value closest to -65.5 = -66.0 
The Integer value closest to -65.5 = -66.0

相关用法

注：本文由纯净天空筛选整理自ankita_chowrasia大神的英文原创作品 StrictMath rint() Method in Java。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。