strictmath

StrictMath类ceil()方法 (StrictMath Class ceil() method)

• ceil() method is available in java.lang package.

  ceil()方法在java.lang包中可用。

• ceil() method is used to return the least or smallest value of the double type value which is greater than or equal to the given parameter.

  ceil()方法用于返回大于或等于给定参数的double类型值的最小值或最小值。

• ceil() method is a static method so this method is accessible with the class name too.

  ceil()方法是静态方法，因此也可以使用类名访问此方法。

• ceil() method does not throw any exception at the time of ceiling the given parameter.

  在给定参数设置上限时， ceil()方法不会引发任何异常。

Syntax:

句法：

    public static double ceil(double d);

Parameter(s):

参数：

• double d – represents the double type value whose least value to be found.

  double d –表示要找到其最小值的double类型值。

Return value:

返回值：

The return type of this method is double – it returns least value of the given parameter.

该方法的返回类型为double-返回给定参数的最小值。

Note:

注意：

• If we pass NaN as an argument, method returns the same value (NaN).

  如果我们将NaN作为参数传递，则方法将返回相同的值(NaN)。

• If we pass zero (0), method returns the same value with the same sign.

  如果传递零(0)，则方法将返回具有相同符号的相同值。

• If we pass an infinity, method returns the same value with the same sign.

  如果我们传递一个无穷大，则方法将返回带有相同符号的相同值。

• If we pass an argument which is less than 0, but greater than -1.0, method returns -0.0.

  如果我们传递的参数小于0但大于-1.0，则方法返回-0.0。

• If we pass an argument whose value after the decimal point is greater than 0, method returns the value incremented by 1.

  如果我们传递的参数的小数点后的值大于0，则方法返回的值将增加1。

Example:

例：

// Java program to demonstrate the example 
// of ceil(double d) method of StrictMath Class.
public class Ceil {
public static void main(String[] args) {
// Variable Declaration
double d1 = -0.0;
double d2 = 0.0;
double d3 = -7.0 / 0.0;
double d4 = 7.0 / 0.0;
double d5 = -0.6;
double d6 = 1000.0;
double d7 = 1000.4;
// Display previous value of d1,d2,d3,d4,d5 ,d6 and d7
System.out.println("d1: " + d1);
System.out.println("d2: " + d2);
System.out.println("d3: " + d3);
System.out.println("d4: " + d4);
System.out.println("d5: " + d5);
System.out.println("d6: " + d6);
System.out.println("d7: " + d7);
// Here , we will get (-0.0) because we are passing 
// parameter (-0.6)  because passed value is less than 0 
// but greater than -1.0
System.out.println("StrictMath.ceil(d1): " + StrictMath.ceil(d1));
// Here , we will get (0.0) because we are passing parameter (0.0)
System.out.println("StrictMath.ceil(d2): " + StrictMath.ceil(d2));
// Here , we will get (-Infinity) because we are passing parameter (-7.0/0.0) 
System.out.println("StrictMath.ceil(d3): " + StrictMath.ceil(d3));
// Here , we will get (Infinity) because we are passing parameter (7.0/0.0) 
System.out.println("StrictMath.ceil(d4): " + StrictMath.ceil(d4));
// Here , we will get (-0.0) because we are passing 
// parameter (-0.6) because passed value is less than 0 
// but greater than -1.0
System.out.println("StrictMath.ceil(d5): " + StrictMath.ceil(d5));
// Here , we will get (1000.0) because we are passing 
// parameter (1000.0) because passed value after decimal 
// point is not greater than 0 so the same number is //returned
System.out.println("StrictMath.ceil(d6): " + StrictMath.ceil(d6));
// Here , we will get (1001.0) because we are passing 
// parameter (1000.4)  because passed value after decimal 
// point is greater than 0 so the number is incremented by 1 is returned
System.out.println("StrictMath.ceil(d7): " + StrictMath.ceil(d7));
}
}

Output

输出量

d1: -0.0
d2: 0.0
d3: -Infinity
d4: Infinity
d5: -0.6
d6: 1000.0
d7: 1000.4
StrictMath.ceil(d1): -0.0
StrictMath.ceil(d2): 0.0
StrictMath.ceil(d3): -Infinity
StrictMath.ceil(d4): Infinity
StrictMath.ceil(d5): -0.0
StrictMath.ceil(d6): 1000.0
StrictMath.ceil(d7): 1001.0

翻译自: https://www.includehelp.com/java/strictmath-ceil-method-with-example.aspx

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