java math 類

數學班靜態雙層(雙D) (Math Class static double floor(double d))

• This method is available in java.lang package.

  此方法在java.lang包中可用。

• In this method if the value of the given positive argument after decimal point is 0 or greater than 0 so in that case it returns the same number before decimal point else if the value of the given negative argument after decimal point is greater than 0 so it returns (the same number +1) before decimal point.

  在此方法中，如果給定的正參數的小數點后的值是0或大于0，那么在這種情況下，它在小數點前返回相同的數字，否則，如果給定的負參數的值后小數點后大于0，則它在小數點前返回(相同的數字+1)。

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

  這是一個靜態方法，因此也可以使用類名訪問此方法。

• The return type of this method is double that means it returns the greatest floating-point value of the given argument and the argument value may be less than or equal to the given argument.

  此方法的返回類型為double，這意味著它將返回給定參數的最大浮點值，并且參數值可能小于或等于給定參數。

• In this method, we pass only one parameter as an argument in the method of Math class.

  在此方法中，我們僅將一個參數作為參數傳遞給Math類的方法。

• This method does not throw any exception.

  此方法不會引發任何異常。

Syntax:

句法：

public static double floor(double d){}

Parameter(s):

參數：

double d – A double value whose greatest floating-poin value to be found.

double d-一個雙精度值，其最大浮點值將被找到。

Note:

注意：

• If we pass "NaN", it returns "NaN".

  如果我們傳遞“ NaN”，則返回“ NaN”。

• If we pass a positive infinity, it returns the same i.e. a positive infinity.

  如果我們傳遞一個正無窮大，它將返回相同的值，即一個正無窮大。

• If we pass a negative infinity, it returns the same i.e. a negative infinity.

  如果我們傳遞一個負無窮大，它將返回相同的值，即一個負無窮大。

• If we pass 0 (-0 or 0), it returns the same.

  如果我們傳遞0(-0或0)，則返回相同值。

Return value:

返回值：

The return type of this method is double, it returns the greatest floating-point value of the given value.

此方法的返回類型為double ，它返回給定值的最大浮點值。

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

// Java program to demonstrate the example of floor(double d) // method of Math Classpublic class FloorMethod {public static void main(String[] args) {// Here we are declaring few variablesdouble d1 = 7.0 / 0.0;double d2 = -7.0 / 0.0;double d3 = 0.0;double d4 = -0.0;double d5 = -123.1;double d6 = 123.456;// Display previous value of d1,d2,d3,d4,d5 and d6 System.out.println(" Before implementing floor() so the value of d1 is :" + d1);System.out.println(" Before implementing floor() so the value of d2 is :" + d2);System.out.println(" Before implementing floor() so the value of d3 is :" + d3);System.out.println(" Before implementing floor() so the value of d4 is :" + d4);System.out.println(" Before implementing floor() so the value of d4 is :" + d5);System.out.println(" Before implementing floor() so the value of d4 is :" + d6);// Here , we will get (Infinity) because we are passing parameter // whose value is (infinity)System.out.println("After implementing floor() so the value of d1 is :" + Math.floor(d1));// Here , we will get (-Infinity) because we are passing parameter // whose value is (-infinity)System.out.println("After implementing floor() so the value of d2 is :" + Math.floor(d2));// Here , we will get (0.0) because we are passing parameter // whose value is (0.0)System.out.println("After implementing floor() so the value of d3 is :" + Math.floor(d3));// Here , we will get (-0.0) because we are passing parameter // whose value is (-0.0)System.out.println("After implementing floor() so the value of d4 is :" + Math.floor(d4));// Here , we will get (-124.0) because we are passing parameter // whose value is (-123.1)System.out.println("After implementing floor() so the value of d5 is :" + Math.floor(d5));// Here , we will get (123.0) because we are passing parameter // whose value is (123.456)System.out.println("After implementing floor() so the value of d6 is :" + Math.floor(d6));} }

Output

輸出量

E:\Programs>javac FloorMethod.javaE:\Programs>java FloorMethod Before implementing floor() so the value of d1 is :Infinity Before implementing floor() so the value of d2 is :-Infinity Before implementing floor() so the value of d3 is :0.0 Before implementing floor() so the value of d4 is :-0.0 Before implementing floor() so the value of d4 is :-123.1 Before implementing floor() so the value of d4 is :123.456After implementing floor() so the value of d1 is :Infinity After implementing floor() so the value of d2 is :-Infinity After implementing floor() so the value of d3 is :0.0 After implementing floor() so the value of d4 is :-0.0 After implementing floor() so the value of d5 is :-124.0 After implementing floor() so the value of d6 is :123.0

翻譯自: https://www.includehelp.com/java/math-class-static-double-floor-double-d-with-example.aspx

java math 類

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