JAVA版彩票随机生成系统

　　


                  import Java.io.*;

import Java.util.Random;


class num

{

public static void main(String[]args)

{

//声明一个随机数组

int sjsh[]=new int[7];

int sum;

try

{

InputStreamReader a=new InputStreamReader(System.in);

BufferedReader b=new BufferedReader(a);

System.out.println ("欢迎使用齐鲁风采30选7彩票随机系统！");

System.out.print ("请选择投注数:");

String s=b.readLine();

int sh=Integer.parseInt(s);

//给随机数组赋随机值 且 保证没有重复

for (int i = 0; i<sh; i  )

{

for (int j = 0; j<7; j  )

{

Random rnd = new Random();

sjsh[j] = rnd.nextInt(31);

switch(j)

{

case 0:;break;

case 1:

{

if(sjsh[j]==sjsh[j-1])

j--;

};break;

case 2:

{

if(sjsh[j]==sjsh[j-1]||sjsh[j]==sjsh[j-2])

j--;

};break;

case 3:

{

if(sjsh[j]==sjsh[j-1]||sjsh[j]==sjsh[j-2]||sjsh[j]==sjsh[j-3])

j--;

};break;

case 4:

{

if(sjsh[j]==sjsh[j-1]||sjsh[j]==sjsh[j-2]||sjsh[j]==sjsh[j-3]||sjsh[j]==sjsh[j-4])

j--;

};break;

case 5:

{

if(sjsh[j]==sjsh[j-1]||sjsh[j]==sjsh[j-2]||sjsh[j]==sjsh[j-3]||sjsh[j]==sjsh[j-4]||sjsh[j]==sjsh[j-5])

j--;

};break;

case 6:

{

if(sjsh[j]==sjsh[j-1]||sjsh[j]==sjsh[j-2]||sjsh[j]==sjsh[j-3]||sjsh[j]==sjsh[j-4]||sjsh[j]==sjsh[j-5]||sjsh[j]==sjsh[j-6])

j--;

};break;

}

}

//冒泡排序

for (int k = 0; k<7; k  )

{

for (int j = 6; j>k; j--)

{

if(sjsh[j]<sjsh[j-1])

{

sum=sjsh[j];

sjsh[j]=sjsh[j-1];

sjsh[j-1]=sum;

}

}

}

for (int j = 0; j<7; j  )

System.out.print (sjsh[j] "\t");

System.out.println ();

}

}

catch (Exception ex)

{

System.out.println ("您的输入有错误！");

}

}

}