Java.math.BigDecimal.scaleByPowerOfTen()方法範例


java.math.BigDecimal.scaleByPowerOfTen(int n) 返回一個BigDecimal,其數值等於 (this * 10n). 精度的結果是 (this.scale() - n).

宣告

以下是java.math.BigDecimal.scaleByPowerOfTen()方法的宣告

public BigDecimal scaleByPowerOfTen(int n)

引數

  • n - 由BigDecimal物件乘以10的冪值

返回值

此方法返回BigDecimal物件 this * 10的值

異常

  • ArithmeticException - 如果精度是一個32位元範圍以外的整數

例子

下面的例子顯示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 );
    }
}

讓我們編譯和執行上面的程式,這將產生以下結果:

235.000 raised to 10 power 3 is 235000
23500 raised to 10 power -3 is 23.500