strictmath

StrictMath类rint()方法 (StrictMath Class rint() method)

• rint() Method is available in java.lang package.

  rint()方法在java.lang包中可用。

• rint() Method is used to return the double type value and if the value of the given argument after decimal point is greater than 4 then the value is incremented by 1 before the decimal point is returned else if the value of the given argument after decimal point is less than or equal to 4 then the same value before the decimal point is returned.

  rint()方法用于返回双精度类型值，如果小数点后给定参数的值大于4，则在返回小数点前将值加1，否则，如果小数点后给定参数的值如果小数点小于或等于4，则返回小数点前的相同值。

• rint() Method is a static method so it is accessible with the class name and if we try to access the method with the class object then we will not get any error.

  rint()方法是一个静态方法，因此可以使用类名进行访问，如果尝试使用类对象访问该方法，则不会出现任何错误。

• rint() Method does not throw any exception.

  rint()方法不会引发任何异常。

Syntax:

句法：

    public static double rint(double d);

Parameter(s):

参数：

• double d – represents a double type value.

  double d –表示双精度型值。

Return value:

返回值：

The return type of the method is double, it returns the double floating point number which will be equivalent to mathematical integer.

该方法的返回类型为double ，它返回等于数学整数的双精度浮点数。

Note:

注意：

• If we pass NaN, the method returns the NaN.

  如果传递NaN，则该方法返回NaN。

• If we an infinity, the method returns the same (i.e. infinity).

  如果我们无穷大，则该方法将返回相同的值(即无穷大)。

• If we pass an argument whose value after the decimal point is greater than 4, the method returns the value incremented by 1 before the decimal point.

  如果我们传递的参数的小数点后的值大于4，则该方法返回的值在小数点前增加1。

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

  如果传递零，则该方法返回具有相同符号的相同值。

Example:

例：

// Java program to demonstrate the example of
// rint(double d) method of StrictMath Class.
public class Rint {public static void main(String[] args) {// variable declarations
double d1 = -0.0;
double d2 = 0.0;
double d3 = -1.0 / 0.0;
double d4 = 1.0 / 0.0;
double d5 = 1234.56;
double d6 = 1234.12;
// Here , we will get (-0.0) because we are
// passing parameter whose value is (-0.0)
System.out.println("StrictMath.rint(d1): " + StrictMath.rint(d1));
// Here , we will get (0.0) and we are
// passing parameter whose value is (0.0)
System.out.println("StrictMath.rint(d2): " + StrictMath.rint(d2));
// Here , we will get (-Infinity) and we are
// passing parameter whose value is (-Infinity)
System.out.println("StrictMath.rint(d3): " + StrictMath.rint(d3));
// Here , we will get (Infinity) and we are
// passing parameter whose value is (Infinity)
System.out.println("StrictMath.rint(d4): " + StrictMath.rint(d4));
// Here , we will get (1235.0) and we are
// passing parameter whose value is (1234.56)
System.out.println("StrictMath.rint(d5): " + StrictMath.rint(d5));
// Here , we will get (1234.0) and we are
// passing parameter whose value is (1234.12)
System.out.println("StrictMath.rint(d6): " + StrictMath.rint(d6));
}
}

Output

输出量

StrictMath.rint(d1): -0.0
StrictMath.rint(d2): 0.0
StrictMath.rint(d3): -Infinity
StrictMath.rint(d4): Infinity
StrictMath.rint(d5): 1235.0
StrictMath.rint(d6): 1234.0

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

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