Java之通讯录系统

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通讯录系统：
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("请先添加联系人!");                if(this.number>99)                return "添加失败";                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("请先添加联系人!");                for(int i=0;i<number;i++)                {                      if((a[i].name).equals(name))                    {                        System.out.println("联系人： "+a[i].name+"   电话："+a[i].number);                        return a[i];                    }                }                return null;                }            public void look()            {                if(number == 0)                System.out.println("请先添加联系人！");                for(int i=0;i<number;i++)                {                    System.out.println("联系人 "+a[i].name+" 电话 "+a[i].number);                }            }            public String delete(String name)            {                if(number == 0)                System.out.println("请先添加联系人：");                for(int i=0;i<number;i++)                {                     if((a[i].name).equals(name))                    {                        a[i]=a[this.number-1];                        number=number-1;                        return "删除成功";                    }                }                return "删除失败";            }}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欢迎使用通讯录系统\n");        System.out.println("\t\t\t1.创建用户\n\n\t\t\t2.退出\n");        System.out.println("____________________________________________________________________\n\n");        System.out.print("请选择相应选项：");        int num2 = sc.nextInt();          while(num2!=2)            {                switch (num2)                {                case 1:                    {                        connect c = new connect();                        System.out.println("\t\t\t1.浏览\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.删除\n");                        System.out.println("\t\t\t5.退出\n");System.out.println("请选择相应选项：");                        System.out.println("输入指令：");                        int num1 = input.nextInt();                        switch (num1)                        {                            case 1:c.look();break;                            case 2:                            {                                System.out.println("输入查找的名字：");                                String n1 = sc.next();c.seek(n1);                            }break;                            case 3:                            {                                System.out.println("输入要添加的人数：");                                    System.out.println("enter:");                                int s=sc.nextInt();                                for(int i=0;i<s;i++)                                {                                    System.out.println("请输入第"+(i+1)+"个人的名字：");                                    String name=sc.next();                                    String number=sc.next();                                    c.add(name,number);                                }                            }break;                            case 4:                            {                                System.out.println("输入删除的姓名：");                                String n3 = sc.next();c.delete(n3);                            }break;                            default:                                {                                    System.out.println("\t\t\t谢谢您的使用\n");                                    System.exit(0);                                }                            }                           }break;                case 2:System.out.println("\t\t\t谢谢您的使用\n");break;                default:System.out.println("输入有误！");num2=2;                }            }    }}
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