Mavan pom文件引用依赖
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<!-- hutool工具类-->
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<dependency>
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<groupId>cn.hutool
</groupId>
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<artifactId>hutool-all
</artifactId>
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<version>5.3.6
</version>
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</dependency>
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<!-- google java类库-->
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<dependency>
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<groupId>com.google.guava
</groupId>
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<artifactId>guava
</artifactId>
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<version>18.0
</version>
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</dependency>
java 单类实现代码，在编辑器里，粘贴下面的代码。鼠标右键、run运行
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import cn.hutool.core.util.RandomUtil;
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import com.google.common.collect.Lists;
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import java.util.
List;
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/**
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* @Author tarzan
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* @Date 2021/4/1 14:43
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* @Description 模拟双色球，随机生成若干住号码
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*/
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public
class DoubleColorBall {
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/**
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* 主方法
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* */
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public
static
void main(
String[] args) {
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getDoubleColorBallNumber(
5);
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}
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/**
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* 获取多注双色球号码
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* */
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public
static
void getDoubleColorBallNumber(
int num){
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System.out.println(
"随机生成"+num+
"注双色球号码为：");
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String resultNumber=
"";
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for (
int i =
0; i < num; i++) {
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System.out.println(
"【"+(i+
1)+
"】 "+resultNumber+getDoubleColorBallNumber());
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}
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}
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/**
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* 获取单注双色球号码
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* */
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public
static
String getDoubleColorBallNumber(){
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String resultNumber=
"";
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for (
int i =
0; i <
6; i++) {
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String ballNumber= RandomUtil.randomEle(getRedBalls())+
"\t";
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resultNumber=resultNumber+ballNumber;
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}
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return resultNumber+RandomUtil.randomEle(getBlueBalls());
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}
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/**
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* 获取红球球号集合
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* */
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public
static
List<
String> getRedBalls(){
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return getBalls(
33);
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}
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/**
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* 获取蓝球球号集合
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* */
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public
static
List<
String> getBlueBalls(){
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return getBalls(
16);
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}
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/**
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* 获取球号集合
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* */
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public
static
List<
String> getBalls(
int num){
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List<
String> redBalls= Lists.newArrayList();
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for (
int i =
1; i <=num; i++) {
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int length=
String.valueOf(num).length();
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String str =
String.format(
"%0"+length+
"d",i);
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redBalls.add(str);
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}
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return redBalls;
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}
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}
结果图
转载：https://blog.csdn.net/weixin_40986713/article/details/115367035
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