集合的几种遍历

步骤：
1、创建学生类
2、创建集合对象
3、创建学生对象
4、把学生对象加入集合对象
5、遍历

package luo2;public class student{    private String name;    private int age;    public student(){}    public student(String name, int age) {        super();        this.name = name;        this.age = age;    }    public String getName() {        return name;    }    public void setName(String name) {        this.name = name;    }    public int getAge() {        return age;    }    public void setAge(int age) {        this.age = age;    }}

package luo2;import java.util.ArrayList;import java.util.Iterator;public class test {    public static void main(String[] args) {        ArrayList<student> arry = new ArrayList<student>();        student s1 = new student("林黛玉", 1);        student s2 = new student("薛宝钗", 2);        student s3 = new student("贾宝玉", 3);        student s4 = new student("史湘云" ,4);        student s5 = new student("王熙凤", 5);        arry.add(s1);        arry.add(s2);        arry.add(s3);        arry.add(s4);        arry.add(s5);        //迭代器        Iterator<student> it = arry.iterator();        while(it.hasNext()){            student s = it.next();            System.out.println(s.getName()+"*****"+s.getAge());        }        System.out.println("----------------");        //普通for循环        for(int x = 0;x<arry.size();x++){            student s = arry.get(x);            System.out.println(s.getName()+"*****"+s.getAge());        }        System.out.println("----------------");        //增强for循环        for(student s: arry){            System.out.println(s.getName()+"*****"+s.getAge());        }    }}

结果：