java.math.BigDecimal.scaleByPowerOfTen(int n) 返回一个BigDecimal,其数值等于 (this * 10n). 精度的结果是 (this.scale() - n).
声明
以下是java.math.BigDecimal.scaleByPowerOfTen()方法的声明
public BigDecimal scaleByPowerOfTen(int n)
参数
-
n - 由BigDecimal对象乘以10的幂值
返回值
此方法返回BigDecimal对象 this * 10n 的值
异常
-
ArithmeticException - 如果精度是一个32位范围以外的整数
例子
下面的例子显示math.BigDecimal.scaleByPowerOfTen()方法的用法
package com.yiibai; import java.math.*; public class BigDecimalDemo { public static void main(String[] args) { // create 4 BigDecimal objects BigDecimal bg1, bg2, bg3, bg4; bg1 = new BigDecimal("235.000"); bg2 = new BigDecimal("23500"); // assign the result of method on bg1, bg2 to bg3, bg4 bg3 = bg1.scaleByPowerOfTen(3); bg4 = bg2.scaleByPowerOfTen(-3); String str1 = bg1 + " raised to 10 power 3 is " +bg3; String str2 = bg2 + " raised to 10 power -3 is " +bg4; // print bg3, bg4 values System.out.println( str1 ); System.out.println( str2 ); } }
让我们编译和运行上面的程序,这将产生以下结果:
235.000 raised to 10 power 3 is 235000 23500 raised to 10 power -3 is 23.500