JavaSE-14.2.6【案例-List集合存储学生对象三种方式遍历】

package day5.lesson2;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

/*
2.7 案例-List集合存储学生对象三种方式遍历
    创建一个存储学生对象的集合，存储3个学生对象，使用程序实现在控制台遍历该集合
 */
public class StudentDemo {
    public static void main(String[] args) {
        List<Student> list = new ArrayList<>();
        Student s1 = new Student("zhangsan", 22);
        Student s2 = new Student("lisi", 24);
        Student s3 = new Student("wangwu", 23);
        list.add(s1);
        list.add(s2);
        list.add(s3);

        //迭代器：集合特有的遍历方式
        Iterator<Student> it = list.iterator();
        while (it.hasNext()){
            Student stu = it.next();
            System.out.println(stu.getName() + "," + stu.getAge());
        }

        //普通for：带有索引的遍历方式
        for (int i=0; i<list.size(); i++){
            Student stu = list.get(i);
            System.out.println(stu.getName() + "," + stu.getAge());
        }

        //增强for：最方便的遍历方式
        for (Student stu: list){
            System.out.println(stu.getName() + "," + stu.getAge());
        }
    }
}

package day5.lesson2;

public class Student {

    private String name;
    private int age;

    public Student() {
    }

    public Student(String name, int age) {
        this.name = name;
        this.age = age;
    }

    public void setName(String name) {
        this.name = name;
    }

    public void setAge(int age) {
        this.age = age;
    }

    public String getName() {
        return name;
    }

    public int getAge() {
        return age;
    }
}