In the procedure requires the use of the string can be broadly classified into two categories, do not need to do is to create after the modifications and changes in string constants, and the other is created after the need to add, insert and modify characters, such as changes string variable. In java, for the constant string object is used String category, it provides a lot of comparison, such as (compareTo), search (indexOf) type operation, and for using a string variable object StringBuffer category, which provides expanded (append ), insert (insert) and other operations.

编写居民身份证源程序.doc

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