Comparing collection objects

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package javaapplication1;

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

/**
 *
 * @author sowjanya.g
 */
public class compare {

    public static void main(String args[]){

        employee e = null;
        List al=new ArrayList();
        e=new employee("sowji","sowji@gmail.com",24);
        al.add(e);
        e=new employee("sowji1","sowji1@gmail.com",30);
        al.add(e);
        boolean checkFlag = false;
        for(employee emp: al){
            if(emp.getMailId().equals("sowji1@gmail.com")){
                checkFlag = true;
                break;
            }
        }
        System.out.println("Check Flag:=="+checkFlag);
        if(!checkFlag){           
            e=new employee("sowji2","sowji1@gmail.com",40);
            al.add(e);
        }
       
        for(employee emp: al){
            System.out.println("email Id:=="+emp.getMailId());
        }


    }

}
class employee
{
    String name;
    String mailId;
    int age;

    public employee(String name,String mail,int age)
    {
        this.name=name;
        this.mailId=mail;
        this.age=age;
    }
    public int getAge() {
        return age;
    }

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

    public String getMailId() {
        return mailId;
    }

    public void setMailId(String mailId) {
        this.mailId = mailId;
    }

    public String getName() {
        return name;
    }

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

}