Java实现的通讯录系统，数据无法传递到数组

Question

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

        public String add(String name,int number)
        {
            if(connect.number == 0)
            System.out.println("请先添加联系人!");
            if(connect.number>99)
            return "添加失败";
            a[connect.number]=new Person();
            a[connect.number].name=name;
            a[connect.number].number=number;
            connect.number++;

            return "添加成功";
        }   

        public Person seek(String name)
        {
            if(connect.number == 0)
            System.out.println("请先添加联系人!");
            for(int i=0;i<connect.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(connect.number == 0)
            System.out.println("请先添加联系人！");
            for(int i=0;i<connect.number;i++)
            {
                System.out.println("联系人 "+a[i].name+" 电话 "+a[i].number);
            }
        }

        public String delete(String name)
        {
            if(connect.number == 0)
            System.out.println("请先添加联系人：");
            for(int i=0;i<connect.number;i++)
            { 
                if((a[i].name).equals(name))
                {
                    a[i]=a[connect.number-1];
                    connect.number=connect.number-1;
                    return "删除成功";
                }
            }
            return "删除失败";
        }

}
public class 通讯录
{
public static void main(String[]args)
{
int num3=2;

    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.用户端进入\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();  

        do {
            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("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：");    

                            int s=sc.nextInt();
                            connect.number=s;
                            for(int i=0;i<s;i++)
                            {
                                System.out.println("请输入第"+(i+1)+"个人的个人信息：");
                                String name=sc.next();
                                int number=sc.nextInt();
                                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;
            }
            System.out.println("如果继续使用输入1，退出请输入2");
            Scanner pd=new Scanner(System.in);
             num3 = pd.nextInt();
             }while(num3==1);
    System.out.println("谢谢使用！");
}

}

Answer 1

你把报错信息截图发出来，看代码的不容易找到痛点。