集合——ArrayList

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package com.test.code;import java.util.*;public class TestList {/** * @param args */public static void main(String[] args) {Manage mng = new Manage();//添加员工Staff st1 = new Staff("刘备",45, 2000);Staff st2 = new Staff("关羽",42, 1800);Staff st3 = new Staff("张飞",38, 1500);Staff st4 = new Staff("项羽",46, 3600);mng.addStaff(st1);mng.addStaff(st2);mng.addStaff(st3);mng.addStaff(st4);mng.delStaff();//删除员工mng.showInfo();}}/* * 员工管理类 */class Manage{private List list = null;//private ArrayList list = null;亦可，前面List为原始类型//构造方法public Manage(){list = new ArrayList();}//加入员工public void addStaff(Staff st){list.add(st);}//显示信息public void showInfo(){System.out.println("姓名\t年龄\t工资");for(int i=0; i<list.size(); i++){Staff st = (Staff)list.get(i);System.out.println(st.getName()+"\t"+st.getAge()+"\t"+st.getSal());}}//删除员工public void delStaff(){list.remove(2);//删除第三位员工}} /* * 员工类 */class Staff{private String name;private int age;private int sal;//构造方法public Staff(String name, int age, int sal){this.name = name;this.age = age;this.sal = sal;}public String getName() {return name;}public void setName(String name) {this.name = name;}public int getSal() {return sal;}public void setSal(int sal) {this.sal = sal;}public int getAge() {return age;}public void setAge(int age) {this.age = age;}}/***********************姓名年龄工资刘备452000关羽421800项羽463600***********************/
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