Java StrictMath cbrt()方法

java.lang.StrictMath.cbrt() 是Java中的一个内置方法，用于返回一个给定的双数值的立方根。该方法显示了三个特殊的结果。

• 当给定的参数为零时，其结果是一个与参数符号相同的零。
• 当参数为无穷大时，结果为与参数符号相同的无穷大。
• 当给定参数为NaN时，结果为NaN。

语法

public static double cbrt( _double num_ )

参数： 该方法接受一个参数 num ，该参数为双数类型，需要找到其立方根。
返回值： 该方法返回 num 的立方根。
以下程序说明了java.lang.StrictMath.cbrt()方法：
程序1 :

// Java program to illustrate the
// java.lang.StrictMath.cbrt()
import java.lang.*;
 
public class Geeks {
 
    public static void main(String[] args)
    {
 
        double val1 = 8.05, val2 = 27, val3 = 0;
 
        // It returns the cube root of a double value
        double cbrtvalue = StrictMath.cbrt(val1);
        System.out.println("Cube root of "+val1+
                                  " = " + cbrtvalue);
 
        cbrtvalue = StrictMath.cbrt(val2);
        System.out.println("Cube root of "+val2+
                                  " = " + cbrtvalue);
 
 
        cbrtvalue = StrictMath.cbrt(val3);
        System.out.println("Cube root of "+val3+
                                  " = " + cbrtvalue);
 
    }
}

输出

Cube root of 8.05 = 2.0041580161269152
Cube root of 27.0 = 3.0
Cube root of 0.0 = 0.0

程序2

// Java program to illustrate the
// java.lang.StrictMath.cbrt()
import java.lang.*;
 
public class Geeks {
 
    public static void main(String[] args)
    {
 
        double val1 = -8.05, val2 = 128, val3 = 0;
 
        // It returns the cube root of a double value
        double cbrtvalue = StrictMath.cbrt(val1);
        System.out.println("Cube root of "+val1+
                                  " = " + cbrtvalue);
 
        cbrtvalue = StrictMath.cbrt(val2);
        System.out.println("Cube root of "+val2+
                                  " = " + cbrtvalue);
 
        cbrtvalue = StrictMath.cbrt(val3);
         System.out.println("Cube root of "+val3+
                                  " = " + cbrtvalue);
 
    }
}

输出

Cube root of -8.05 = -2.0041580161269152
Cube root of 128.0 = 5.039684199579493
Cube root of 0.0 = 0.0