Question

java怎么生成00到09(00,01,02.....09)且展现方式为每个数字之间一个空格的大量随机数

Answer 1

生成30个 00-09的随机数，你要生成几个就把30改成几

public static void main(String[] args) {

Random rand = new Random(); 

List list = new ArrayList<>();

for (int i = 0; i < 30; i++) {

list.add("0"+rand.nextInt(9));

}

for (Object object : list) {

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

}

}

Answer 2

import java.util.ArrayList;
import java.util.List;
import java.util.Random;

public class Test {
public static void main(String[] arguments){

List<String> list=new ArrayList<String>();
while(list.size()<10)//随机数个数
{
Random random = new Random();
String ran = "0"+random.nextInt(10);
list.add(ran);
}
for (String a : list) {
System.out.print(a+" ");
}
}
}