簡(jiǎn)單實(shí)現(xiàn)Java通訊錄系統(tǒng)

import java.util.Scanner;
class Person
  {
   String name;
   String number;
  }
class connect
{
   Person a[];
   int number;
   public connect()
   {
     a=new Person[100];
     number=0;
   } 

   public String add(String name,String number)
   {
    if(number == "0")
    System.out.println("請(qǐng)先添加聯(lián)系人!");
    if(this.number>99)
    return "添加失敗";
    a[this.number]=new Person();
    a[this.number].name=name;
    a[this.number].number=number;
    this.number++;
    return "添加成功";
   } 

   public Person seek(String name)
   {
    if(number == 0)
    System.out.println("請(qǐng)先添加聯(lián)系人!");
    for(int i=0;i<number;i++)
    { 
     if((a[i].name).equals(name))
     {
      System.out.println("聯(lián)系人： "+a[i].name+" 電話："+a[i].number);
      return a[i];
     }
    }
    return null; 
   }

   public void look()
   {
    if(number == 0)
    System.out.println("請(qǐng)先添加聯(lián)系人！");
    for(int i=0;i<number;i++)
    {
     System.out.println("聯(lián)系人 "+a[i].name+" 電話 "+a[i].number);
    }
   }

   public String delete(String name)
   {
    if(number == 0)
    System.out.println("請(qǐng)先添加聯(lián)系人：");
    for(int i=0;i<number;i++)
    { 
     if((a[i].name).equals(name))
     {
      a[i]=a[this.number-1];
      number=number-1;
      return "刪除成功";
     }
    }
    return "刪除失敗";
   }
}
public class text1
{
 public static void main(String[]args)
 {
  Scanner sc=new Scanner(System.in);
  Scanner input = new Scanner(System.in);
  System.out.println("\t\t\t歡迎使用通訊錄系統(tǒng)\n");
  System.out.println("\t\t\t1.創(chuàng)建用戶\n\n\t\t\t2.退出\n");
  System.out.println("____________________________________________________________________\n\n");
  System.out.print("請(qǐng)選擇相應(yīng)選項(xiàng)：");
  int num2 = sc.nextInt(); 
  while(num2!=2)
   {
    switch (num2)
    {
    case 1:
     {
      connect c = new connect();
      System.out.println("\t\t\t1.瀏覽\n");System.out.println("\t\t\t2.查找\n");
      System.out.println("\t\t\t3.添加\n");System.out.println("\t\t\t4.刪除\n");
      System.out.println("\t\t\t5.退出\n");System.out.println("請(qǐng)選擇相應(yīng)選項(xiàng)：");
      System.out.println("輸入指令：");
      int num1 = input.nextInt();
      switch (num1)
      {
       case 1:c.look();break;
       case 2:
       {
        System.out.println("輸入查找的名字：");
        String n1 = sc.next();c.seek(n1);
       }break;
       case 3:
       {
        System.out.println("輸入要添加的人數(shù)："); 
        System.out.println("enter:");
        int s=sc.nextInt();
        for(int i=0;i<s;i++)
        {
         System.out.println("請(qǐng)輸入第"+(i+1)+"個(gè)人的名字：");
         String name=sc.next();
         String number=sc.next();
         c.add(name,number);
        }
       }break;
       case 4:
       {
        System.out.println("輸入刪除的姓名：");
        String n3 = sc.next();c.delete(n3);
       }break;
       default:
        {
         System.out.println("\t\t\t謝謝您的使用\n");
         System.exit(0);
        }
       } 
      }break;
    case 2:System.out.println("\t\t\t謝謝您的使用\n");break;
    default:System.out.println("輸入有誤！");num2=2;
    }
   }
 }
}