Java StrictMath rint()方法

rint() 是Java中StrictMath类的内置方法，用于获取与参数值最接近且等于整数的双倍值。当作为整数的两个双倍值与给定参数的值同样接近时，它返回的整数值是偶数。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。
语法

public static double rint(double num)

参数： 该方法接受单参数 num ，为双数类型，使用该方法进行转换。

返回值： 该方法返回与整数最接近的浮点值。

示例 :

输入: num =72.2
输出:72.0

以下程序说明了rint()方法：

程序1 :

// Java program 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

程序2

// Java program 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