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!24 update docs/java/basis/java-basic-questions-02.md.

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Merge pull request !24 from 格致诚正，修齐治平/N/A
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@ -761,7 +761,7 @@ String d = str1 + str2; // 常量池中的对象
System.out.println(c == d);// true System.out.println(c == d);// true
``` ```
被 `final` 关键字修改之后的 `String` 会被编译器当做常量来处理，编译器在程序编译期就可以确定它的值，其效果就相当于访问常量。 被 `final` 关键字修饰之后的 `String` 会被编译器当做常量来处理，编译器在程序编译期就可以确定它的值，其效果就相当于访问常量。
如果 ，编译器在运行时才能知道其确切值的话，就无法对其优化。 如果 ，编译器在运行时才能知道其确切值的话，就无法对其优化。