如何在给定范围内打印数字。示例:10 - 13按随机顺序(10 12 13 11)?
public class RandomizeNumbers {
public static void main(String[] args) {
Scanner getInput = new Scanner(System.in);
int minimum = getInput.nextInt();
int maximum = getInput.nextInt();
Random t = new Random();
for (int i = minimum; i <= maximum; i++) {
System.out.println(t.nextInt(i));
}
}
}
答案 0 :(得分:4)
填写包含必要项目的列表并使用Collections.shuffle()
对其进行随机播放,然后打印:
List<Integer> c = new ArrayList<>();
for (int i = start; i <= end; i++)
c.add(i);
Collections.shuffle(c);
System.out.println(c);
答案 1 :(得分:0)
只是为了知识,你不能使用这种方法,
new Random().ints(start, endExclusive).distinct().limit(quantity).boxed().forEach(System.out::println);
Obs:你需要java 8才能使用它。
答案 2 :(得分:0)
使用Java 8 IntStream,它就像:
一样简单IntStream.rangeClosed(minimum, maximum).map(i -> t.nextInt(i))
.forEach(System.out::println);
用法:
import java.util.Random;
import java.util.Scanner;
import java.util.stream.IntStream;
public class RandomNumbers {
public static void main(String[] args) {
Scanner getInput = new Scanner(System.in);
int minimum = getInput.nextInt();
int maximum = getInput.nextInt();
Random t = new Random();
IntStream.rangeClosed(minimum, maximum).map(i -> t.nextInt(i))
.forEach(System.out::println);
getInput.close();
}
}