GeezerVison is showing github.com — Update Java Note · Seazean/JavaNote@8bd68a0
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Copy file name to clipboardExpand all lines: Java.md +1-1Lines changed: 1 addition & 1 deletion - Display the source diff
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@@ -2865,7 +2865,7 @@ public class MyArraysDemo { |
2865 | 2865 | 1. 导入包：`import java.util.Random` |
2866 | 2866 | 2. 创建对象：`Random r = new Random()` |
2867 | 2867 | 3. 随机整数：`int num = r.nextInt(10)` |
2868 | | - * 解释：10 代表的是一个范围，如果括号写 10，产生的随机数就是 0 - 9，括号写 20 的随机数则是 0 - 19 |
| 2868 | + * 解释：10 代表的是一个范围，如果括号写 10，产生的随机数就是 0 - 9，括号写 20 的随机数则是 0 - 19 |
2869 | 2869 | * 获取 0 - 10：`int num = r.nextInt(10 + 1)` |
2870 | 2870 |
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2871 | 2871 | 4. 随机小数：`public double nextDouble()` 从范围 `0.0d` 至 `1.0d` （左闭右开），伪随机地生成并返回 |
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Copy file name to clipboardExpand all lines: Prog.md +4-1Lines changed: 4 additions & 1 deletion - Display the source diff
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@@ -3593,7 +3593,10 @@ public class TestFinal { |
3593 | 3593 |
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3594 | 3594 | final 变量的赋值通过 putfield 指令来完成，在这条指令之后也会加入写屏障，保证在其它线程读到它的值时不会出现为 0 的情况 |
3595 | 3595 |
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3596 | | -其他线程访问 final 修饰的变量**会复制一份放入栈中**，效率更高 |
| 3596 | +其他线程访问 final 修饰的变量 |
| 3597 | + |
| 3598 | +* **复制一份放入栈中**直接访问，效率高 |
| 3599 | +* 大于 short 最大值会将其复制到类的常量池，访问时从常量池获取 |
3597 | 3600 |
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3598 | 3601 |
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3599 | 3602 |
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Copy file name to clipboardExpand all lines: SSM.md +1-1Lines changed: 1 addition & 1 deletion - Display the source diff
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@@ -14632,7 +14632,7 @@ ApplicationContextInitializer、SpringApplicationRunListener、CommandLineRunner |
14632 | 14632 |
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14633 | 14633 | #### 文件类型 |
14634 | 14634 |
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14635 | | -SpringBoot 是基于约定的，很多配置都有默认值，如果想使用自己的配置替换默认配置，可以使用 application.properties 或者application.yml（application.yaml）进行配置 |
| 14635 | +SpringBoot 是基于约定的，很多配置都有默认值，如果想使用自己的配置替换默认配置，可以使用 application.properties 或者 application.yml（application.yaml）进行配置 |
14636 | 14636 |
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14637 | 14637 | * 默认配置文件名称：application |
14638 | 14638 | * 在同一级目录下优先级为：properties > yml > yaml |
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