用java中的Arraylist实现电话本系统管理

大致思路：创建一个电话本条目的类，在主类中实例化。用实例化的对象调用构造参数接收输入值，然后将此对象存入Arraylist的对象中，实现动态添加电话本条目。

该系统具备添加、删除、修改、查询所有和按姓名查询等。

 //定义PersonIitm类
 public class PersonItem {
     private String pname;
     private char psex;
     private int page;
     private String phonenum;
     private String qnumber;
     private String paddress;
 //构造函数
     public void setName(String pname)
     {
         this.pname = pname;
     }

     public void setSex(char psex)
     {
         this.psex = psex;
     }

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

     public void setPhone(String phonenum)
     {
         this.phonenum = phonenum;
     }

     public void setQQ(String qnumber)
     {
         this.qnumber = qnumber;
     }

     public void setAddress(String paddress)
     {
         this.paddress = paddress;
     }

     public String getName()
     {
         return pname;
     }

     public char getSex()
     {
         return psex;
     }

     public int getAge()
     {
         return page;
     }

     public String getPhone()
     {
         return phonenum;
     }

     public String getQQ()
     {
         return qnumber;
     }

     public String getAddress()
     {
         return paddress;
     }

 }

 import java.util.ArrayList;
 import java.util.Scanner;

 public class MainPage {
     public static void main(String[] args)
     {
         int cho = 0;
         @SuppressWarnings("resource")
         Scanner sc = new Scanner(System.in);
         do
         {
             System.out.println("--------------------电话本管理系统"
                      + "--------------------\n"
                      + "1.添加\t2.删除\t3.修改\t4.查询所有\t5.根据姓名查询\t0.退出\n"
                      + "--------------------电话本管理业务"
                      + "--------------------\n请选择业务");
             cho = sc.nextInt();
             switch(cho)
             {
                 case 0:
                     System.out.println("退出系统");
                     break;
                 case 1:
                     InsertItem();
                     break;
                 case 2:
                     RemoveItem();
                     break;
                 case 3:
                     UpdateItem();
                     break;
                 case 4:
                     SelectAll();
                     break;
                 case 5:
                     SelectItem();
                     break;
                 default:
                     System.out.println("没有此选项！");
                     break;
             }
         }
         while(cho != 0);

     }

     static ArrayList<PersonItem> item = new ArrayList<PersonItem> ();
     //定义添加函数
     public static void InsertItem()
     {
         System.out.print("------------添加电话本------------\n姓名：");
         @SuppressWarnings("resource")
         Scanner sc = new Scanner(System.in);
         PersonItem pi = new PersonItem();  //类实例化
         pi.setName(sc.next());
         System.out.print("性别：");
         pi.setSex(sc.next().charAt(0));
         System.out.print("年龄：");
         pi.setAge(sc.nextInt());
         System.out.print("电话：");
         pi.setPhone(sc.next());
         System.out.print("QQ：");
         pi.setQQ(sc.next());
         System.out.print("地址：");
         pi.setAddress(sc.next());
         item.add(pi);
         System.out.println("姓名："+pi.getName()+",性别："+pi.getSex()+",年龄："+pi.getAge()+",电话："
                          +pi.getPhone()+",QQ："+pi.getQQ()+",地址："+pi.getAddress()+"\n添加成功");
     }

     //定义查找人名函数
     public static void SelectItem()
     {
         System.out.print("------------查找电话本------------\n"
                          + "请输入姓名：");
         @SuppressWarnings("resource")
         Scanner sc = new Scanner(System.in);
         String name = sc.next();
         int i = -1;
         for(int j = 0;j < item.size();j++)
         {
             if(item.get(j).getName().equals(name))   //切记不用“==”比较，它比较的是地址
             {
                 i = j;
                 break;
             }
         }//遍历查询人名
         if(i == -1)
             System.out.println("此人不存在");
         else
             System.out.println("姓名："+item.get(i).getName()+",性别："+item.get(i).getSex()+",年龄："+item.get(i).getAge()+",电话："
                      +item.get(i).getPhone()+",QQ："+item.get(i).getQQ()+",地址："+item.get(i).getAddress());
     }

     //定义查找所有函数
     public static void SelectAll()
     {
         System.out.println("------------打印所有电话本------------");
         for(int i = 0;i < item.size();i++)
         {
             System.out.println("姓名："+item.get(i).getName()+",性别："+item.get(i).getSex()+",年龄："+item.get(i).getAge()+",电话："
                      +item.get(i).getPhone()+",QQ："+item.get(i).getQQ()+",地址："+item.get(i).getAddress());
         }
     }

     //删除函数
     public static void RemoveItem()
     {
         System.out.print("------------删除电话本------------\n"
                          + "请输入删除的姓名 ");
         @SuppressWarnings("resource")
         Scanner sc = new Scanner(System.in);
         String name = sc.next();
         int i = -1;
         for(int j = 0;j < item.size();j++)
         {
             if(item.get(j).getName().equals(name))
             {
                 i = j;
                 break;
             }
         }
         if(i == -1)
             System.out.println("此人不存在");
         else
         {
             System.out.println("姓名："+item.get(i).getName()+",性别："+item.get(i).getSex()+",年龄："+item.get(i).getAge()+",电话："
                      +item.get(i).getPhone()+",QQ："+item.get(i).getQQ()+",地址："+item.get(i).getAddress());
             System.out.println("确定吗？1（是）0（否）");
             if(sc.nextInt() == 1)
             {
                 item.remove(i);
                 System.out.println("删除成功");
             }
         }

     }

     //修改函数
     public static void UpdateItem()
     {
         System.out.print("------------修改电话本------------\n"
                          + "输入姓名：");
         @SuppressWarnings("resource")
         Scanner sc = new Scanner(System.in);
         String name = sc.next();
         int i = -1;
         for(int j = 0;j < item.size();j++)
         {
             if(item.get(j).getName().equals(name))
             {
                 i = j;
                 break;
             }
         }
         if(i == -1)
             System.out.println("此人不存在");
         else
         {
             System.out.println("姓名："+item.get(i).getName()+",性别："+item.get(i).getSex()+",年龄："+item.get(i).getAge()+",电话："
                      +item.get(i).getPhone()+",QQ："+item.get(i).getQQ()+",地址："+item.get(i).getAddress());
             System.out.print("请输入信息\n姓名：");
             item.get(i).setName(sc.next());
             System.out.print("性别：");
             item.get(i).setSex(sc.next().charAt(0));
             System.out.print("年龄：");
             item.get(i).setAge(sc.nextInt());
             System.out.print("电话：");
             item.get(i).setPhone(sc.next());
             System.out.print("QQ：");
             item.get(i).setQQ(sc.next());
             System.out.print("地址：");
             item.get(i).setAddress(sc.next());
             System.out.println("姓名："+item.get(i).getName()+",性别："+item.get(i).getSex()+",年龄："+item.get(i).getAge()+",电话："
                      +item.get(i).getPhone()+",QQ："+item.get(i).getQQ()+",地址："+item.get(i).getAddress());
             System.out.println("修改成功");

         }
     }
 }