java中arraylist集合

package com.ls;
//这个学生类
public class Student {
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;
}
public String getSex() {
return sex;
}
public void setSex(String sex) {
this.sex = sex;
}
private String name;
private int age;
private String sex;
}

package com.ls;

import java.util.ArrayList;

public class Class {
public ArrayList testarraylist() {
Student student = new Student();
student.setName("小明");
student.setAge(12);
student.setSex("男");
Student student2 = new Student();
student2.setName("小红");
student2.setAge(14);
student2.setSex("女");
Student student3 = new Student();
student3.setName("小东");
student3.setAge(16);
student3.setSex("男");
ArrayList al =new ArrayList();
al.add(student);
al.add(student2);
al.add(student3);
return al;
}
public static void main(String[] args) {
Class clas=new Class();
ArrayList al=clas.testarraylist();
for(int i=0;i Student student=al.get(i);
System.out.println("姓名->"+student.getName()+" "+"年龄->"+student.getAge());
}
}
}
//这样应该解决你的问题把

public class Student {
private String name;
private String sex;
private int age;
//set,get方法省略
}

public class Clazz {
private List students = new ArrayList();

//省略get/set方法
}

public class Tester{

public static void main(String[] args) {
Student stu1 = new Student("stu1","M",24);
Student stu2 = new Student("stu2","F",23);
List stus = new ArrayList();
Clazz clazz = new Clazz();
clazz.setStudents(stus);

//遍历
if(clazz.getStudents() != null && clazz.getStudents().size() != 0){
for(Student stu : clazz.getStudents()){
//处理每一个Student对象
}
}
}
}