java.math.BigDecimal.scaleByPowerOfTen(int n)是java上的一个内置方法,该方法返回一个BigDecimal,其数值等于(this * 10n)。结果的小数位是(this.scale() – n)。
用法:
public BigDecimal scaleByPowerOfTen(int n)
参数:
该方法接受整数类型的单个参数n,该参数n表示BigDecimal对象乘以10的幂的值。
返回值:此方法返回值BigBig的对象,其值为* 10n。
以下示例程序旨在说明上述方法:
示例1:
// Java program to demonstrate the
// scaleByPowerOfTen() method
import java.math.*;
public class Gfg {
public static void main(String[] args)
{
// Assign two bigecimal objects
BigDecimal b1 = new BigDecimal("754.000");
BigDecimal b2 = new BigDecimal("75400");
// Assign the result of method on b1, b2
// to BigDecimal objects b3, b4
BigDecimal b3 = b1.scaleByPowerOfTen(4);
BigDecimal b4 = b2.scaleByPowerOfTen(-4);
// Print b3, b4 values
System.out.println(b1 + " raised to power is " + b3);
System.out.println(b2 + " raised to power is " + b4);
}
}
输出:
754.000 raised to power is 7.54000E+6 75400 raised to power is 7.5400
示例2:
// Java program to demonstrate the
// scaleByPowerOfTen() method
import java.math.*;
public class Gfg {
public static void main(String[] args)
{
// Assign two bigecimal objects
BigDecimal b1 = new BigDecimal("200");
BigDecimal b2 = new BigDecimal("7540000000");
// Assign the result of method on b1, b2
// to BigDecimal objects b3, b4
BigDecimal b3 = b1.scaleByPowerOfTen(4);
BigDecimal b4 = b2.scaleByPowerOfTen(-4);
// Print b3, b4 values
System.out.println(b1 + " raised to power is " + b3);
System.out.println(b2 + " raised to power is " + b4);
}
}
输出:
200 raised to power is 2.00E+6 7540000000 raised to power is 754000.0000
参考: https://docs.oracle.com/javase/7/docs/api/java/math/BigDecimal.html#scaleByPowerOfTen(int)
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注:本文由纯净天空筛选整理自Twinkl Bajaj大神的英文原创作品 BigDecimal scaleByPowerOfTen() method in Java。非经特殊声明,原始代码版权归原作者所有,本译文未经允许或授权,请勿转载或复制。