Java类BigDecimal（1）

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package com.ylchou.testBigDecimal;import java.math.BigDecimal;public class TestBigDecimal {public static void main(String[] args) {System.out.println(0.08+0.07);System.out.println(0.08-0.07);System.out.println(0.08*0.07);System.out.println(0.08/0.07);//System.out.println(0.05-0.02);//System.out.println(1.15*100);//System.out.println(123.3/100);System.out.println("--------------------------------------------");BigDecimal d1 = new BigDecimal(0.08);BigDecimal d2 = new BigDecimal(0.07);System.out.println(d1.add(d2));System.out.println(d1.subtract(d2));System.out.println(d1.multiply(d2));//System.out.println(d1.divide(d2));//异常System.out.println(d1.divide(d2,10,BigDecimal.ROUND_HALF_UP));System.out.println("--------------------------------------------");BigDecimal d11 = new BigDecimal("0.08");BigDecimal d22 = new BigDecimal("0.07");System.out.println(d11.add(d22));System.out.println(d11.subtract(d22));System.out.println(d11.multiply(d22));//System.out.println(d11.divide(d22));//异常System.out.println(d11.divide(d22,10,BigDecimal.ROUND_HALF_UP));System.out.println("--------------------------------------------");BigDecimal d111 = BigDecimal.valueOf(0.08);BigDecimal d222 = BigDecimal.valueOf(0.07);System.out.println(d111.add(d222));System.out.println(d111.subtract(d222));System.out.println(d111.multiply(d222));//System.out.println(d111.divide(d222));//异常 System.out.println(d111.divide(d222,10,BigDecimal.ROUND_HALF_UP));System.out.println("--------------------------------------------");}}

控制台输出：

0.15000000000000002
0.009999999999999995
0.005600000000000001
1.1428571428571428
--------------------------------------------
0.15000000000000000832667268468867405317723751068115234375
0.00999999999999999500399638918679556809365749359130859375
0.00560000000000000064948046940571658724118100550360839641493294928918135477946549372063600458204746246337890625
1.1428571429
--------------------------------------------
0.15
0.01
0.0056
1.1428571429
--------------------------------------------
0.15
0.01
0.0056
1.1428571429
--------------------------------------------