防止重复串JAVA

Question

子字符串搜索这是我做过什么：

String[] conjunctions = new String[] { 
      "after", "although", "as if", 
      "as long as", "as much as", "as soon as", 
      "as though", "because", "before", "by the time", 
      "even if", "even though", "if", 

    }; 
    for (String toSearch : conjunctions) { 
     int occurrence = textToAnalyse.split("(?i)\\W" + toSearch +"\\W").length - 1; 
     System.out.println(toSearch + " X " + occurrence); 
    } 

例如，"if"和"even if"将被视为是"if"同样的事情也会被计算两次。有没有一种方法来优先搜索后者，并阻止JAVA搜索两次？非常感谢

输入：

textToAnalyse = "Even if you are smart, you are still dumb." 

预期输出：

even if X 1 
if X 0 

Answer 1

你或许应该改变你的方法有点。考虑将连词定义为互斥正则表达式的列表，然后计算匹配的数量。作为一个令人愉快的副作用，这种方法也将消除构建大量子串的需要，这应该有助于内存使用。