Java Math BigDecimal.scale() 方法 Java Math BigDecimal.round() 方法 Java Math BigDecimal.scaleByPowerOfTen() 方法 Java Math BigDecimal.scale() 方法 package com.codingdict; import java.math.*; public class BigDecimalDemo { public static void main(String[] args) { // create 2 BigDecimal Objects BigDecimal bg1, bg2; bg1 = new BigDecimal("123.0"); bg2 = new BigDecimal("-1.123"); // create two int objects int i1,i2; // assign the result of scale on bg1, bg2 to i1,i2 i1 = bg1.scale(); i2 = bg2.scale(); String str1 = "The scale of " + bg1 + " is " + i1; String str2 = "The scale of " + bg2 + " is " + i2; // print the values of i1,i2; System.out.println( str1 ); System.out.println( str2 ); } } Java Math BigDecimal.round() 方法 Java Math BigDecimal.scaleByPowerOfTen() 方法