package test;import java.util.Map;import java.util.Map.Entry;import java.util.TreeMap;public class a23 {/** * @param args */public static void main(String[] args) {String str = "aaabbdddcc";String r =
正则表达式规则: 字符 x 字符 x \\ 反斜线字符 \0n 八进制值的字符0n (0 <= n <= 7) \0nn 八进制值的字符 0nn (0 <= n <= 7) \0mnn 八进制值的字符0mnn 0mnn (0 <= m <= 3, 0 <= n <= 7) \xhh 十六进制值的字符0xhh \uhhhh 十六进制值的字符
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