创建一个customer类，类中的属性有姓名，年龄，性别，每个属性分别有get、set方法。然后创建两个customer对象：张立，18，女和王猛，22，男。把这两个对象存储在ArrayList对象中

import java.util.HashSet;
import java.util.Set;
import java.awt.List;
import java.util.ArrayList;

public class Customer {
	private String name;
	int age;
	String sex;
	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;
	}
	public Customer(String name,int age,String sex) {
		this.name=name;
		this.age=age;
		this.sex=sex;
		
	}
	public static void main(String[] args) {
		Customer c1 = new Customer("zhangli",18,"女");
		Customer c2 = new Customer("wangmeng",22,"男");

		ArrayList<Customer> list = new ArrayList<Customer>();
	     list.add(c1);                                       
	     list.add(c2);
	     for(Customer c:list){
	         System.out.println("姓名"+c.getName());
	         System.out.println("年龄"+c.getAge());
	         System.out.println("性别"+c.getSex());
	     }
	 }
		
	}