Double類doubleToLongBits()方法 (Double class doubleToLongBits() method)

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

  doubleToLongBits()方法在java.lang包中可用。

• doubleToLongBits() method follows IEEE 754 double floating-point standards and according to standards, it returns the bits that denote floating-point value.

  doubleToLongBits()方法遵循IEEE 754雙浮點(diǎn)標(biāo)準(zhǔn)，并且根據(jù)這些標(biāo)準(zhǔn)，它返回表示浮點(diǎn)值的位。

• doubleToLongBits() method is a static method, it is accessible with the class name too and if we try to access the method with the class object then also we will not get an error.

  doubleToLongBits()方法是一個(gè)靜態(tài)方法，也可以使用類名進(jìn)行訪問，如果我們嘗試使用類對象訪問該方法，那么也不會收到錯(cuò)誤。

• doubleToLongBits() method does not throw an exception at the time of representing bits.

  doubleToLongBits()方法在表示位時(shí)不會引發(fā)異常。

Syntax:

句法：

public static long doubleToLongBits(double value);

Parameter(s):

參數(shù)：

• double value – This parameter represents the double precision floating point value.

  double value –此參數(shù)表示雙精度浮點(diǎn)值。

Return value:

返回值：

The return type of this method is long, it returns the bits that represent the double precision floating-point value.

此方法的返回類型為long ，它返回表示雙精度浮點(diǎn)值的位。

Note:

注意：

• If we pass positive infinity, it returns the value 0x7ff0000000000000L.

  如果我們傳遞正無窮大 ，它將返回值0x7ff0000000000000L 。

• If we pass negative infinity, it returns the value 0xfff0000000000000L.

  如果我們傳遞負(fù)無窮大 ，它將返回值0xfff0000000000000L 。

• If we pass NaN, it returns the value 0x7ff8000000000000L.

  如果我們通過NaN ，它將返回值0x7ff8000000000000L 。

Example:

例：

// Java program to demonstrate the example // of doubleToLongBits(double value) // method of Double classpublic class DoubleToLongBitsOfDoubleClass {public static void main(String[] args) {// Variables initializationdouble value1 = 18.20;double value2 = 19.20;// Display value1,value2 valuesSystem.out.println("value1: " + value1);System.out.println("value2: " + value2);// It returns the bits denoted by the double // floating-point argument by calling // Double.doubleToLongBits(value1)long result1 = Double.doubleToLongBits(value1);// It returns the bits denoted by the double // floating-point argument by calling // Double.doubleToLongBits(value2)long result2 = Double.doubleToLongBits(value2);// Display result1,result2 valuesSystem.out.println("Double.doubleToLongBits(value1): " + result1);System.out.println("Double.doubleToLongBits(value2): " + result2);} }

Output

輸出量

value1: 18.2 value2: 19.2 Double.doubleToLongBits(value1): 4625816062258262835 Double.doubleToLongBits(value2): 4626097537234973491

翻譯自: https://www.includehelp.com/java/double-class-doubletolongbits-method-with-example.aspx

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