Java Math BigDecimal.round() 方法 Java Math Bigdecimal Remainder_mc Java Math BigDecimal.scale() 方法 Java Math BigDecimal.round() 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("5.46497"); MathContext mc = new MathContext(3); // 3 precision // bg1 is rounded using mc bg2 = bg1.round(mc); String str = "The value " + bg1 + " after rounding is " + bg2; // print bg2 value System.out.println( str ); } } Java Math Bigdecimal Remainder_mc Java Math BigDecimal.scale() 方法