“ 
 String str = “北京市(朝阳区)(西城区)(海定区)”; 
 String ptr = “.*?(?=\()”; 
 Pattern p = Pattern.compile(ptr); 
 Matcher matcher = p.matcher(str); 
 if(matcher.find()){ 
 System.out.println(matcher.group()); 
 } 
 “`
“ 
 String str = “北京市(朝阳区)(西城区)(海定区)”; 
 String ptr = “.*?(?=\()”; 
 Pattern p = Pattern.compile(ptr); 
 Matcher matcher = p.matcher(str); 
 if(matcher.find()){ 
 System.out.println(matcher.group()); 
 } 
 “`
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