[英]How can I print numbers within given range in random order
如何打印给定范围内的数字。 例如:以随机顺序10-13(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));
}
}
}
用必要的项目填充列表,并使用Collections.shuffle()
对其进行混洗,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);
仅出于知识目的,您一定不能使用这种方法,
new Random().ints(start, endExclusive).distinct().limit(quantity).boxed().forEach(System.out::println);
Obs:您需要Java 8才能使用它。
使用Java 8 IntStream ,它很简单:
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();
}
}
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