java *中奖程序

import java.io.*;
import java.util.Scanner;
import java.util.Random;
public class Lottery {
    public int[] Ran(int x,int z,int y,int Is_repeat){//产生z到y的x个随机数,
        //Is_repeat为0时随机数可以重复，1时不能重复
        System.out.print("中奖号：");
        int[] R=new int[x];
        Random RR=new Random();
        for(int i=0;i<x;i++){
            R[i]=RR.nextInt(y-1)+z;
            while(Is_repeat==1&&Exist(R[i],R,i)!=-1)
                R[i]=RR.nextInt(y)+1;//若随机数重复，就重新生成
            System.out.print(R[i]+"	");
        }
        return R;
    };
    public int Exist(int x,int r[],int number_r){//数字x是否存在于r
        for(int i=0;i<number_r;i++){
            if(x==r[i])
                return i;
        }
        return -1;
    }
    public int Ncount(int[] a,int number_a,int r[],int number_r,int queue){
        //两个数组之间有几个相同的数,
        //数目为number_a的a数组在数目为number_r的r数组有几个相同的数，若queue=1时
        //返回的数为有连续相同的位数的个数,为0时则不用连续
        System.out.println();
        System.out.print("选择号：");
        int count=0;
        if(queue==0){
            for(int i=0;i<number_a;i++){
                System.out.print(a[i]+"	");
                if(new Lottery().Exist(a[i], r, number_r)!=-1)
                    count++;
            }
        }
        else{
            int teap=0;
            for(int i=0;i<number_a-1;i++){
                System.out.print(a[i]+"	");
                int s=new Lottery().Exist(a[i], r, number_r);
                if(s!=-1){
                    teap++;
                    if(s<number_a-1&&a[i+1]==r[s+1]){
                        continue;
                    }
                    else{
                        if(teap>count){
                            count=teap;
                            teap=0;
                            }
                        }
                    }
                }
            System.out.print(a[number_a-1]+"	");
        }
        return count;
    }

    public static void main(String[]args){
        String game1="玩法1（21选5）：输入五个不重复的数（从1到21选）";
        System.out.println(game1);
        String game2="玩法2（6+1）：输入7个数字，最后一位特别号（从0到9选）";
        System.out.println(game2);
        System.out.print("请问您选择哪种玩法（1/2）：");
        //BufferedReader in=new BufferedReader(new InputStreamReader(System.in));
        Scanner idata=new Scanner(System.in);
        int s=idata.nextInt();
        try{
            //s=in.readLine();
            if(s==1||s==2){
                if(s==1){
                    System.out.println("请输入五个不重复的数：");
                    int[] a=new int[5];
                    a[0]=idata.nextInt();
                    a[1]=idata.nextInt();
                    a[2]=idata.nextInt();
                    a[3]=idata.nextInt();
                    a[4]=idata.nextInt();
                    int[] ran=new Lottery().Ran(5,1,21,1);
                    int count0=new Lottery().Ncount(a,5,ran,5,0);
                    System.out.println();
                    System.out.println("count0="+count0);
                    switch(count0){
                    case 0:
                    case 1:
                    case 2:
                        System.out.println("未得奖，相同个数为——"+count0);
                        break;
                    case 3:
                        System.out.println("三等奖，相同个数为——"+count0);
                        break;
                    case 4:
                        System.out.println("二等奖，相同个数为——"+count0);
                        break;
                    case 5:
                        System.out.println("一等奖，相同个数为——"+count0);
                        break;
                    }
                }
                else{
                    System.out.println("请输入七个数：");
                    int[] a=new int[7];
                    a[0]=idata.nextInt();
                    a[1]=idata.nextInt();
                    a[2]=idata.nextInt();
                    a[3]=idata.nextInt();
                    a[4]=idata.nextInt();
                    a[5]=idata.nextInt();
                    a[6]=idata.nextInt();
                    int[] ran=new Lottery().Ran(7,0,10,0);
                    int count0=new Lottery().Ncount(a,7,ran,7,1);
                    System.out.println();
                    System.out.println("count0="+count0);
                    switch(count0){
                    case 0:
                    case 1:
                    case 2:
                        System.out.println("未得奖，连续相同个数为——"+count0);
                        break;
                    case 3:
                        System.out.println("四等奖，连续相同个数为——"+count0);
                        break;
                    case 4:
                        System.out.println("三等奖，连续相同个数为——"+count0);
                        break;
                    case 5:
                        System.out.println("二等奖，连续相同个数为——"+count0);
                        break;
                    case 6:
                        System.out.println("一等奖，连续相同个数为——"+count0);
                        break;
                    case 7:
                        System.out.println("特等奖，连续相同个数为——"+count0);
                        break;
                        }
                }
                
            }else 
                System.out.println("输入有误");
        }catch(Exception e){System.out.println(e);};
        
    }
}