把某个算法替换成另一个更清晰的算法

public String foundPerson(String[] people) {for(int i=0; i<people.length; i++) {if (people[i].equals("Don")) {return "Don";}if (people[i].equals("John")) {return "John";}if (people[i].equals("Kent")) {return "Kent";}}return "";
}

重构：将函数本体替换为另一个算法

public String foundPerson(String[] people) {List candidates = Arrays.asList(new String[]{"Don", "John", "Kent"});for(int i=0; i<people.length; i++) {if (candidates.contains(people[i])) {return people[i];}}return "";
}