遍历为何报错呀？？
遍历学生对象stu课程时为啥会报错呀？
4 回答
private Set<Courses> courses;
public Set<Courses> getCourses() {
return courses;
}
public void setCourses(Set<Courses> courses) {
this.courses = courses;
} //利用foreach遍历student中选择的课程
public void travelStudent(Students student) {
for(Courses course:student.getCourses()) {
System.out.println("course:"+course.getId()+" , "+course.getName());
}
}
构造Student类的时候，需要进行泛型
private Set<Courses> courses; public Set<Courses> getCourses() { return courses; } public void setCourses(Set<Courses> courses) { this.courses = courses; } //利用foreach遍历student中选择的课程 public void travelStudent(Students student) { for(Courses course:student.getCourses()) { System.out.println("course:"+course.getId()+" , "+course.getName()); } } //用于创建新的学生 public Students(String id,String name) { this.id = id; this.name = name; this.courses = new HashSet();//位于util.HashSet类中，是Set接口下的一个重要类 //对courses进行实例化 }
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