java实现小的搜索引擎

package 数组;

import java.util.Scanner;

/**

*@version 创建时间：2020/3/25
*类说明：字符串比较和搜索引擎
*/
public class SouSuoYQ {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        int i;
        int choice;//选择
        float money = 0;//总钱数
        float n;//个数
        String name = "王小川";
        String pass = "wxc1314520";
        String name1;
        String pass1;
        Scanner input = new Scanner(System.in);
        String num1[];
        num1 = new String[]{"原子弹","无人机","航空母舰","导弹","枪支"};
        String num;
        System.out.println("**************************");
        System.out.println("**<<<<<<<暗网系统>>>>>>>**");
        System.out.println("**************************");
        System.out.println("友情提示:该系统是私人系统");
        System.out.print("请输入用户名:");
        name1 = input.next();
        System.out.print("请输入秘钥:");
        pass1 = input.next();
        if(name1.equals(name) && pass1.equals(pass))
        {
            System.out.println("你已经进入");
              while(true)
              {
              
            
            System.out.println("**************************");
            System.out.println("**<<<<<<<军火商场>>>>>>>**");
            System.out.println("**************************");
            System.out.println("1,继续操作");
            System.out.println("2,退出系统");
            System.out.print("请输入你的选择:");
            choice = input.nextInt();
            if(choice == 1)
            {
        
      
             
        System.out.print("请输入你需要的武器:");
        num = input.next();
        for(i = 0;i < num1.length;i ++)
        {
            if(num.equals(num1[i]))
            {
                switch(num)
                {
                   
                case "原子弹":
                    n = 0;
                    System.out.println("1,品牌名称：原子弹" + "\t" + "23亿美元");
                    System.out.print("请输入数量:");
                    n = input.nextInt();
                    money += n * 23;
                    break;
                case "无人机":
                    n = 0;
                    System.out.println("1,赫尔墨斯900" + "\t" + "1亿美元");
                    System.out.println("2,RQ-4全球鹰" + "\t" + "1.9亿美元");
                    System.out.print("请输入你的选择:");
                    choice = input.nextInt();
                    if(choice == 1)
                    {
                        System.out.print("请输入数量:");
                        n = input.nextFloat();
                        money += n * 1;
                    }
                    else
                    {
                        System.out.print("请输入数量:");
                        n = input.nextFloat();
                        money += (float)(n * 1.9);
                    }
                    break;
                case "航空母舰":
                    n = 0;
                    System.out.println("1,福特号航母" + "\t" + "34亿美元");
                    System.out.println("2,尼米兹级航母" + "\t" + "20亿美元");
                    System.out.print("请输入你的选择:");
                    choice = input.nextInt();
                    if(choice == 1)
                    {
                        System.out.print("请输入数量:");
                        n = input.nextFloat();
                        money += n * 34;
                    }
                    else
                    {
                        System.out.print("请输入数量:");
                        n = input.nextFloat();
                        money += (float)(n * 20);
                    }
                    break;
                case "导弹":
                    System.out.println("1,三叉戟II型" + "\t" + "0.1亿美元");
                    System.out.println("2,撒旦" + "\t" + "0.11亿美元");
                    System.out.print("请输入你的选择:");
                    choice = input.nextInt();
                    if(choice == 1)
                    {
                        System.out.print("请输入数量:");
                        n = input.nextFloat();
                        money += (float)(n * 0.1);
                    }
                    else
                    {
                        System.out.print("请输入数量:");
                        n = input.nextFloat();
                        money += (float)(n * 0.11);
                    }
                    break;
                case "枪支":
                    n = 0;
                    System.out.println("以1千作为数量的基本单位");
                    System.out.println("1,斯塔尔SSg69" + "\t" + "一千个 ：2亿元");
                    System.out.println("2,巴雷特M82" + "\t" + "一千个 ： 1.5亿元");
                    System.out.print("请输入你的选择:");
                    choice = input.nextInt();
                    if(choice == 1)
                    {
                        System.out.print("请输入数量:");
                        n = input.nextFloat();
                        money += n * 2;
                    }
                    else
                    {
                        System.out.print("请输入数量:");
                        n = input.nextFloat();
                        money += (float)(n * 1.5);
                    }
                    break;
                }
                
                break;
            }
            
        }
        if(i == num1.length)
        {
            System.out.println("疫情当下，货源不足，暂时无货");
            
        }
        
       
        }
         else
            {
             System.out.println("总花费:" + money + "亿美元");
              money = 0;
                 System.out.println("欢迎下次使用");
                 break;
            }
    }
        
       
        }
    }

}