From e03d26e20324052b167411aafddfdaccad906716 Mon Sep 17 00:00:00 2001
From: qixiao <60742716+qq651901286@users.noreply.github.com>
Date: Sun, 30 Jun 2024 22:23:35 +0800
Subject: [PATCH] =?UTF-8?q?=E6=9B=B4=E6=96=B0Update=20java-basic-questions?=
 =?UTF-8?q?-01.md=E6=96=87=E4=BB=B6=E5=AF=B9BigDecimal=E6=8F=8F=E8=BF=B0?=
 =?UTF-8?q?=EF=BC=8C=E6=AF=94=E8=BE=83=E5=80=BC=E5=86=85=E5=AE=B9=E5=BA=94?=
 =?UTF-8?q?=E8=AF=A5=E7=94=A8compareTo?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 docs/java/basis/java-basic-questions-01.md | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/docs/java/basis/java-basic-questions-01.md b/docs/java/basis/java-basic-questions-01.md
index 3e510212e76..de037a3aa3d 100644
--- a/docs/java/basis/java-basic-questions-01.md
+++ b/docs/java/basis/java-basic-questions-01.md
@@ -662,15 +662,18 @@ System.out.println(a == b);// false
 
 ```java
 BigDecimal a = new BigDecimal("1.0");
-BigDecimal b = new BigDecimal("0.9");
+BigDecimal b = new BigDecimal("1.00");
 BigDecimal c = new BigDecimal("0.8");
 
-BigDecimal x = a.subtract(b);
+BigDecimal x = a.subtract(c);
 BigDecimal y = b.subtract(c);
 
-System.out.println(x); /* 0.1 */
-System.out.println(y); /* 0.1 */
-System.out.println(Objects.equals(x, y)); /* true */
+System.out.println(x); /* 0.2 */
+System.out.println(y); /* 0.20 */
+// 比较内容，不是比较值
+System.out.println(Objects.equals(x, y)); /* false */
+// 比较值相等用相等compareTo，相等返回0
+System.out.println(0 == x.compareTo(y)); /* true */
 ```
 
 关于 `BigDecimal` 的详细介绍，可以看看我写的这篇文章：[BigDecimal 详解](https://javaguide.cn/java/basis/bigdecimal.html)。