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@@ -640,16 +640,16 @@ Java 中有 8 种基本数据类型，分别为：
 
 这 8 种基本数据类型的默认值以及所占空间的大小如下：
 
-| 基本类型  | 位数 | 字节 | 默认值  |
-| :-------- | :--- | :--- | :------ |
-| `byte`    | 8    | 1    | 0       |
-| `short`   | 16   | 2    | 0       |
-| `int`     | 32   | 4    | 0       |
-| `long`    | 64   | 8    | 0L      |
-| `char`    | 16   | 2    | 'u0000' |
-| `float`   | 32   | 4    | 0f      |
-| `double`  | 64   | 8    | 0d      |
-| `boolean` | 1    |      | false   |
+| 基本类型  | 位数 | 字节 | 默认值  | 取值范围                                   |
+| :-------- | :--- | :--- | :------ | ------------------------------------------ |
+| `byte`    | 8    | 1    | 0       | -128 ~ 127                                 |
+| `short`   | 16   | 2    | 0       | -32768 ~ 32767                             |
+| `int`     | 32   | 4    | 0       | -2147483648 ~ 2147483647                   |
+| `long`    | 64   | 8    | 0L      | -9223372036854775808 ~ 9223372036854775807 |
+| `char`    | 16   | 2    | 'u0000' | 0 ~ 65535                                  |
+| `float`   | 32   | 4    | 0f      | 1.4E-45 ~ 3.4028235E38                     |
+| `double`  | 64   | 8    | 0d      | 4.9E-324 ~ 1.7976931348623157E308          |
+| `boolean` | 1    |      | false   | true、false                                |
 
 对于 `boolean`，官方文档未明确定义，它依赖于 JVM 厂商的具体实现。逻辑上理解是占用 1 位，但是实际中会考虑计算机高效存储因素。