重学java——增强for~~~

如果只是遍历使用superfor比较方便，如果是需要到索引就用普通for；

package com.cn;

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

public class SuperforDemo {
    public static void main(String[] args) {
        //creat the object about list
        List list =  new ArrayList<>();
        //creat the Student about list
        Student s1 = new Student("ytt",12);
        Student s2 = new Student("ytt",12);
        Student s3 = new Student("ytt",12);
        Student s4 = new Student("ytt",12);

        list.add(s1);
        list.add(s2);
        list.add(s3);
        list.add(s4);

        //1迭代器
        Iterator it = list.iterator();
        while (it.hasNext()){
            Student s = it.next();
            System.out.println(s.getName()+"--"+s.getAge());
        }
        //2
        for(Student s :list){
            System.out.println(s.getName()+"--"+s.getAge());
        }

    }
}