摘要：
<build> <plugins> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-antrun-plugin</artifactId> <executions> <execution> <phase>pa 阅读全文
摘要：
public static void main(String[] args) { String s= "U18A1组"; char[] chars = s.toCharArray(); for (int i = chars.length-1; i >=0 ; i--) { if ((chars[i] 阅读全文