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整理重点
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@@ -208,7 +208,7 @@ String是immutable,表示其值是不能更改的;一旦给一个String类
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例如:
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```
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``` java
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import java.util.Scanner;
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public class PalindromeIgnoreNonAlphanumeric {
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@@ -262,4 +262,8 @@ public class PalindromeIgnoreNonAlphanumeric {
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}
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```
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##
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## 4. 本章重点
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1. 掌握原始类型对应的封装类型;
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2. 掌握数值封装类型和原始类型,字符串的相互转换;
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3. 了解StringBuilder 的使用
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