ArrayList的用法

/**
 * 作者：
 * 日期：2013-11-16
 * 功能：ArrayList集合的使用
 */
package com.cg;

import java.util.*;

public class Demo2 {
	
	public static void main(String[] args) {
		
		ArrayList al = new ArrayList();
		Clerk clerk1 = new Clerk("松鼠",20,100);
		Clerk clerk2 = new Clerk("松鼠2",22,1002);
		//将雇员加入到集合
		al.add(clerk1);
		al.add(clerk2);
		System.out.println("al大小"+al.size());
		//遍历集合中的元素
		for(int i=0;i<al.size();i++){
			
			Clerk cle = (Clerk)al.get(i);
			System.out.println("雇员名字："+cle.getName());
		}
		//从集合中删除雇员
		al.remove(0);
		System.out.println("al大小"+al.size());
		//遍历集合中的元素
		for(int i=0;i<al.size();i++){
			
			Clerk cle = (Clerk)al.get(i);
			System.out.println("雇员名字："+cle.getName());
		}
	}
}

//雇员类
class Clerk{
	
	//雇员属性
	String name;
	int age;
	float salary;
	
	public Clerk(){
	}
	
	public Clerk(String name,int age,int sal){
		
		this.name = name;
		this.age = age;
		this.salary = sal;
	}

	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 float getSalary() {
		return salary;
	}

	public void setSalary(float salary) {
		this.salary = salary;
	}
	
}