Merge pull request #2663 from 1312255201/patch-2

建议:修改RoundingMode的样例中注释采用的数据

Author: Snailclimb

docs/java/basis/bigdecimal.md

@@ -99,20 +99,20 @@ public BigDecimal divide(BigDecimal divisor, int scale, RoundingMode roundingMod
 
 ```java
 public enum RoundingMode {
-   // 2.5 -> 3 , 1.6 -> 2
-   // -1.6 -> -2 , -2.5 -> -3
+   // 2.4 -> 3 , 1.6 -> 2
+   // -1.6 -> -2 , -2.4 -> -3
    UP(BigDecimal.ROUND_UP),
-   // 2.5 -> 2 , 1.6 -> 1
-   // -1.6 -> -1 , -2.5 -> -2
+   // 2.4 -> 2 , 1.6 -> 1
+   // -1.6 -> -1 , -2.4 -> -2
    DOWN(BigDecimal.ROUND_DOWN),
-   // 2.5 -> 3 , 1.6 -> 2
-   // -1.6 -> -1 , -2.5 -> -2
+   // 2.4 -> 3 , 1.6 -> 2
+   // -1.6 -> -1 , -2.4 -> -2
    CEILING(BigDecimal.ROUND_CEILING),
    // 2.5 -> 2 , 1.6 -> 1
    // -1.6 -> -2 , -2.5 -> -3
    FLOOR(BigDecimal.ROUND_FLOOR),
-   // 2.5 -> 3 , 1.6 -> 2
-   // -1.6 -> -2 , -2.5 -> -3
+   // 2.4 -> 2 , 1.6 -> 2
+   // -1.6 -> -2 , -2.4 -> -2
    HALF_UP(BigDecimal.ROUND_HALF_UP),
    //......
 }