Java模拟生成双色球

public void main (String[] args){

int[] red=new int[7]

int blue=0

for(int i=0i<7i=i+1){

red[i]=getRandom(33)

//判断重复

while(true){

boolean needcheck=false

for(int k=0k<ik=k+1) { if(red[i]==red[k]){ needcheck=true}}

if(needcheck){red[i]=red[i]+1if(red[i]==34){red[i]=1}}else{break}

}

//判断重复结束

}

//红球赋值结束

blue=getRandom(16)

System.out.println("生成的红球为："+ red[0]+red[1]+red[2]+red[3]+red[4]+red[5]+red[6])

System.out.println("生成的蓝球为："+ )

}

public int getRandom(int Max){

return Math.floor(Math.random()*33)+1

}

就是从36个数中选出7个，这36个数是什么可以自己指定，但必须保证不重复，我写的一个代码

public

class

test

{

public

static

void

main(String[]

args)

{

int[]

a

=

new

int[36]

for(int

i

=

0

i

<

36

++i)

a[i]

=

i+1

for(int

i

=

0

i

<

5

++i)

randomSelect(a,

7)

}

static

void

randomSelect(int[]

a,

int

n)

{

randomShuffle(a,

7)

for(int

i

=

0

i

<

n

++i)

System.out.print(a[i]

+

"

")

System.out.println()

}

static

void

randomShuffle(int[]

a,

int

n)

{

for(int

i

=

0

i

<

n

++i)

{

int

r

=

(int)(Math.random()

*

a.length)

int

tmp

=

a[i]

a[i]

=

a[r]

a[r]

=

tmp

}

}

}

public class RandomDemo {

public static void main(String[] args) {

LotteryTicket lt = new LotteryTicket()

int red[] = lt.getRed()

System.out.print("随机生成的红球为：")

for(int i=0i<6i++){

System.out.print(" "+red[i])

}

System.out.print("\t蓝球为："+lt.getBlue())

}

}

class LotteryTicket{彩票生成类

private int[] red = new int[6]

public int[] getRed(){//返回红球

int i =0

for(i<6i++){

red[i] = (int)(Math.random()*33) +1

for(int j=0j<ij++){//保证了重复，我个从认为这个彩票好像不能重复吧

if(red[i]==red[j]){

red[i] = (int)(Math.random()*33) +1

j=0

}

}

}

return red

}

public int getBlue(){//返回蓝球

return (int)(Math.random()*16) +1

}

}

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