Java BigDecimal longValueExact()方法与示例
BigDecimal類longValueExact()方法 (BigDecimal Class longValueExact() method)
longValueExact() method is available in java.math package.
longValueExact()方法在java.math包中可用。
longValueExact() method is used to convert this BigDecimal to an exact long value. When this BigDecimal holds a fractional part other than 0 or not in a range to represent long then ArithmeticException is thrown.
longValueExact()方法用于將此BigDecimal轉換為確切的long值。 當此BigDecimal的小數部分不為0或不在表示long的范圍內時,則拋出ArithmeticException。
longValueExact() method is a non-static method, it is accessible with the class object only and if we try to access the method with the class name then we will get an error.
longValueExact()方法是一種非靜態方法,只能通過類對象訪問,如果嘗試使用類名稱訪問該方法,則會收到錯誤消息。
longValueExact() method may throw an exception at the time of converting BigDecimal to the long.
在將BigDecimal轉換為long時, longValueExact()方法可能會引發異常。
ArithmeticException: This exception may throw when this BigDecimal holds a fractional part that is other than 0 or the resulting value is not enough to adjust in a long.
ArithmeticException :當此BigDecimal包含一個非0的小數部分或所得到的值不足以長時間調整時,可能會引發此異常。
Syntax:
句法:
public long longValueExact();Parameter(s):
參數:
It does not accept any parameter.
它不接受任何參數。
Return value:
返回值:
The return type of this method is long, it gets the long representation of this BigDecimal.
此方法的返回類型為long ,它獲取此BigDecimal的long表示形式。
Example:
例:
// Java program to demonstrate the example // of long longValueExact() method of BigDecimalimport java.math.*;public class LongValueExactOfBD {public static void main(String args[]) {// Initialize two variables first is// of "float" and second is of "String"// typefloat val = 11562387.23f;String str = "100";// Initialize two BigDecimal objects BigDecimal b_dec1 = new BigDecimal(val);BigDecimal b_dec2 = new BigDecimal(str);// convert this BigDecimal (b_dec1) into// a exact long, variable named l_convlong l_conv = b_dec1.longValueExact();System.out.println("b_dec1.longValueExact(): " + l_conv);// convert this BigDecimal (b_dec2) into// a exact long, variable named l_convl_conv = b_dec2.longValueExact();System.out.println("b_dec2.longValueExact(): " + l_conv);} }Output
輸出量
b_dec1.longValueExact(): 11562387 b_dec2.longValueExact(): 100翻譯自: https://www.includehelp.com/java/bigdecimal-longvalueexact-method-with-example.aspx
總結
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