36选7java代码的简单介绍

java: 用Random产生随机数放在数组中，就像36选7那样。7个数字都不相同！

import java.util.Random;

public class Rand {

public static void main(String[] args) {

final int[] nums = new int[7];

Random rand = new Random();

for(int i = 0; i nums.length; i++){

int randNum = rand.nextInt(35);//simple test, the number not grater than 35

boolean isExistingNum = false;

//check whether it's already in the array;

for(int j =0; j i; j++){

if(nums[j] == randNum){

isExistingNum = true;

break;

}

}

if(isExistingNum){

i--;

}else{

nums[i] = randNum;

}

}

//print the array

for(int i = 0; i nums.length; i++){

System.out.println(nums[i]);

}

}

}

相关问答

Q1: java生成100组36选7的数组,并统计1~36中的各个数字出现的次数。

//见代码实现，测试通过

import java.util.ArrayList;

import java.util.Arrays;

import java.util.HashSet;

import java.util.Iterator;

import java.util.List;

import java.util.Random;

import java.util.Set;

public class RandomTest {

public static void main(String[] args) {

Random r = new Random();

List list = new ArrayListHashSet();

for (int i = 0; i 100; i++) {

Set set = new HashSetInteger();

int j = 0;

while (j 7) {

int random = r.nextInt(37);

if (!set.contains(random) random 0) {

set.add(random);

j++;

}

}

list.add(set);

}

int a[] = new int[700];

int j = 0;

for (int i = 0; i list.size(); i++) {

HashSet set = (HashSet) list.get(i);

Iterator it = set.iterator();

while (it.hasNext()) {

a[j] = Integer.parseInt(it.next().toString());

j++;

}

}

Arrays.sort(a);

int count = 0;

int c, d;

c = d = 1;

for (int i = 0; i a.length; i++) {

c = a[i];

if (d != c) {

System.out.println("出现" + d + "，次数：" + count);

d = c;

count = 0;

}

count++;

}

}

}

Q2: java小程序代码 抽奖 36选1共选6个还有一个是32 选一只选一个 类似双色球抽奖

//36中(1~36)选6位

for (int i = 1; i =6 ; i++)

{

int k = (int)((36-1+1)*Math.random()+1);

System.out.println(k);

if (k==0)

{

break;

}

}

//32中(1~32)选1位

int k = (int)((32-1+1)*Math.random()+1);

System.out.println(k);

Q3: 用JAVA便携一个程序，用来模拟随机生成一个36选7的彩票号码

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;

}

}

}

Q4: 用JAVA编写程序"36选7”，从1到36数中任意输入7个数，其中数字不重复 并打印出来

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;

select(a, 7, 36);

}

static void select(int[] a, int n, int m) {

qsort(a, 0, m-1);

reverse(a, n, m-1);

print(a, 0, n-1);

int p = n;

while(true) {

if(p == 0)

break;

int k = p;

if(a[--p] a[k]) {

int r = m;

while(a[--r] a[p]);

if(p == 0 r == 1)

break;

if(r n)

continue;

swap(a, r, p);

if(k n) {

qsort(a, k, r-1);

reverse(a, n, r-1);

}

print(a, 0, n-1);

p = n;

}

}

}

static int c = 0;

static void print(int[] a, int i, int j) {

System.out.print("No." + ++c + " ");

for(int k = i; k = j; ++k)

System.out.print(a[k]+" ");

System.out.println();

}

static void swap(int[] a, int i, int j) {

int t = a[i];

a[i] = a[j];

a[j] = t;

}

static void reverse(int[] a, int i, int j) {

while(i j)

swap(a, i++, j--);

}

static void qsort(int[] a, int i, int j) {

while(i j) {

int s = i;

for(int k = i; k j; ++k)

if(a[k] a[j])

swap(a, s++, k);

swap(a, s, j);

qsort(a, i, s-1);

i = s + 1;

}

}

}

Q5: java 程序 在线等！！！

import java.io.*;

public class CaipiaoOne {

public static void main(String[] args) throws Exception {

int n = 0;

int[] num = new int[7];

System.out.print("请输入要生成的注数：");

BufferedReader in = new BufferedReader(new InputStreamReader(System.in));

n = Integer.parseInt(in.readLine());

int tmp = 0;

for(int i=0;in;i++){

for(int j=0;j7;j++){

tmp=(int)(Math.random()*36);

while(tmp==0)

tmp=(int)(Math.random()*36);

System.out.print(tmp+" ");

}

System.out.println();

}

}

}

//Lottery类

import java.util.Date;

class Lottery{

int[] num = new int[7];//用于存放随机产生的7个号码

//实现7个号码的产生

public void generate(){

int tmp;

for(int j=0;j7;j++){

tmp=(int)(Math.random()*36);

while(tmp==0)

tmp=(int)(Math.random()*36);

num[j]=tmp;

}

}

//实现票头的打印

public static void pringTitle(){

System.out.println("欢迎使用本彩票号码选择器");

System.out.println("********************");

System.out.println(new Date());

System.out.println();

}

//实现号码的打印

public void printData(){

for(int j=0;j7;j++){

System.out.print(num[j]+" ");

}

System.out.println();

}

public Lottery(){

generate();

printData();

}

}

//测试类

import java.io.*;

public class CaipiaoTwo {

public static void main(String[] args) throws Exception {

System.out.print("请输入要生成的注数：");

BufferedReader in = new BufferedReader(new InputStreamReader(System.in));

int n = Integer.parseInt(in.readLine());

Lottery.pringTitle();

for(int i=0;in;i++){

new Lottery();

}

}

}