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Update Java基础知识.md

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修改文本错误"NullPointExecrption"改为"NullPointException"
位于3.2异常中的 3.2.1
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冲冲冲 2021-02-07 17:34:11 +08:00 committed by GitHub
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@ -1225,7 +1225,7 @@ Java 代码在编译过程中，如果受检查异常没有被 `catch`/`throw`
Java 代码在编译过程中 ，我们即使不处理不受检查异常也可以正常通过编译。
`RuntimeException` 及其子类都统称为非受检查异常，例如：`NullPointExecrption`、`NumberFormatException`（字符串转换为数字）、`ArrayIndexOutOfBoundsException`（数组越界）、`ClassCastException`（类型转换错误）、`ArithmeticException`（算术错误）等。
`RuntimeException` 及其子类都统称为非受检查异常，例如：`NullPointException`、`NumberFormatException`（字符串转换为数字）、`ArrayIndexOutOfBoundsException`（数组越界）、`ClassCastException`（类型转换错误）、`ArithmeticException`（算术错误）等。
#### 3.2.2. Throwable 类常用方法