目录 Supervised ML and Sentiment AnalysisSupervised ML (training)Sentiment analysis Vocabulary and Feature ExtractionVocabularyFeature extractionSparse representations and some of their issues Negative and Positive FrequenciesFeature extraction with freque…
一、多态性 多态在java中的体现是 父类的引用指向子类的对象 格式: 父类类型 变量名 子类对象 1、代码案例
vi Person.java
public class Person {public String name;public int age;//新增方法public void eat(){System.out.println("人吃饭");}…