java遍历的一个题求助！！！！！

12345678910111213141516171819202122232425262728293031323334353637383940414243444546    import java.util.*; // 测试方法public class Main {    public static void main(String[] args){        Student student1 = new Student();        student1.setName("张三");                 Student student2 = new Student();        student2.setName("李四");                 Student student3 = new Student();        student3.setName("王五");                 List list = new ArrayList();        studentList.add(student1);        studentList.add(student2);        studentList.add(student3);                 for (Student student : list) {            System.out.println(student.getName());        }                 // 或        // for (int i = 0; i < list.size; i++) {        //     System.out.println(list.get(i).getName());        // }    }} // Student实体类public class Student{    private String name;         public Student(){             }     public void setName(String name) {        this.name = name;    }     public String getName() {        return name;    }}