个回答

• 勤奋加努力

  2016-06-06 09:54:27

  已采纳

  import java.util.HashSet;

  import java.util.Set;

  
  

  /**

   * 学生类

   * @author Administrator

   *

   */

  public class Student {

  
  

  public String id;

  public String name;

  public Set<Course> courses;

  
  

  public Student(String id, String name) {

  this.id = id;

  this.name = name;

  this.courses = new HashSet<Course>();

  }

  }

  
  

  0

• 勤奋加努力

  2016-06-06 09:44:52

  你的把鼠标移到那个x的地方看看报的错误是什么啊，

  或者你可以复制一下我的代码看会不会出错；

  package com.imooc.collection;

  
  

  import java.util.HashSet;

  import java.util.Set;

  
  

  /**

   * 学生类

   * @author Administrator

   *

   */

  public class Student {

  public String id;

  public String name;

  public Se courses;

  public Student(String id, String name) {

  this.id = id;

  this.name = name;

  this.courses = new HashSet();

  }

  }

  
  

  0