Java Math BigDecimal.plus() 方法 Java Math Bigdecimal Negate_mc Java Math BigDecimal.plus(MathContext mc) 方法 Java Math BigDecimal.plus() 方法 package com.codingdict; import java.math.*; public class BigDecimalDemo { public static void main(String[] args) { // create 2 BigDecimal Objects BigDecimal bg1, bg2; // assign value to bg1 bg1 = new BigDecimal("-123.126"); // assign the result of plus method on bg1 to bg2 bg2 = bg1.plus(); String str = "The value of the BigDecimal is " + bg2; // print the value of bg2 System.out.println( str ); } } Java Math Bigdecimal Negate_mc Java Math BigDecimal.plus(MathContext mc) 方法