数学班双胞胎(double d) (Math Class double ceil(double d))

• This method is available in java.lang package.

  此方法在java.lang包中可用。

• This 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.

  此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。

• This is a static method so it is accessible with the class name too.

  这是一个静态方法，因此也可以使用类名进行访问。

• The return type of this method is double that means it returns the smallest value of the given parameter [double type].

  此方法的返回类型为double，这意味着它返回给定参数的最小值[double type]。

• In this method, we pass only one parameter as an argument.

  在此方法中，我们仅传递一个参数作为参数。

• This method does not throw any exception.

  此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 – A double value whose least or smallest value to be found.

double d-一个双精度值，其最小值或最小值将被找到。

Note:

注意：

• If we pass "NaN", it returns "NaN".

  如果我们传递“ NaN”，则返回“ NaN”。

• If we pass zero, it returns the same.

  如果传递零，则返回相同值。

• If we pass an infinity (positive or negative), it returns the infinity with the same sign.

  如果传递无穷大(正数或负数)，它将返回具有相同符号的无穷大。

• If we pass an argument whose value is less than 0 but greater than -1.0, it returns -0.0.

  如果我们传递的值小于0但大于-1.0的参数，则返回-0.0。

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

  如果我们传递一个参数，该参数的小数点后的值大于0，则返回的值将增加1。

Return value:

返回值：

The return type of this method is double, it returns the least or smallest value of the double type value which is greater than or equal to the given parameter.

此方法的返回类型为double ，它返回大于或等于给定参数的double类型值的最小或最小值。

Java程序演示ceil(double d)方法的示例 (Java program to demonstrate example of ceil(double d) method)

// Java program to demonstrate the example of
// ceil(double d) method of Math Class
class CeilMethod {public static void main(String[] args) {// Here we are declaring few variables
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("Old value of d1 before implementation is: " + d1);
System.out.println("Old value of d2 before implementation is :" + d2);
System.out.println("Old value of d3 before implementation is :" + d3);
System.out.println("Old value of d4 before implementation is :" + d4);
System.out.println("Old value of d5 before implementation is :" + d5);
System.out.println("Old value of d6 before implementation is :" + d6);
System.out.println("Old value of d7 before implementation is :" + 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("New value of d1 after implementation is :" + Math.ceil(d1));
// Here , we will get (0.0) because we are passing parameter (0.0)
System.out.println("New value of d2 after implementation is :" + Math.ceil(d2));
// Here , we will get (-Infinity) because we are passing
// parameter (-7.0/0.0)
System.out.println("New value of d3 after implementation is :" + Math.ceil(d3));
// Here , we will get (Infinity) because we are passing
// parameter (7.0/0.0)
System.out.println("New value of d4 after implementation is :" + Math.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("New value of d5 after implementation is :" + Math.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("New value of d6 after implementation is :" + Math.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("New value of d7 after implementation is :" + Math.ceil(d7));
}
}

Output

输出量

E:\Programs>javac CeilMethod.java
E:\Programs>java CeilMethod
Old value of d1 before implementation is :-0.0
Old value of d2 before implementation is :0.0
Old value of d3 before implementation is :-Infinity
Old value of d4 before implementation is :Infinity
Old value of d5 before implementation is :-0.6
Old value of d6 before implementation is :1000.0
Old value of d7 before implementation is :1000.4
New value of d1 after implementation is :-0.0
New value of d2 after implementation is :0.0
New value of d3 after implementation is :-Infinity
New value of d4 after implementation is :Infinity
New value of d5 after implementation is :-0.0
New value of d6 after implementation is :1000.0
New value of d7 after implementation is :1001.0

翻译自: https://www.includehelp.com/java/math-class-static-double-ceil-double-d-with-example.aspx