如何生成Java中不会重复的随机值
要生成不会重复的随机值，请使用HashSet集合。首先，创建一个随机对象和HashSet-
Random randNum = new Random(); Set<Integer>s = new HashSet<Integer>();
现在，添加随机整数-
while (s.size() < 10) {
s.add(randNum.nextInt());
}现在，显示唯一的随机数-
List<Integer>list = new ArrayList<Integer>(s); System.out.println(list);
示例
import java.util.ArrayList;
import java.util.HashSet;
import java.util.Set;
import java.util.Random;
import java.util.List;
public class Demo {
public static void main(String[] args) {
Random randNum = new Random();
Set<Integer>s = new HashSet<Integer>();
while (s.size() < 10) {
s.add(randNum.nextInt());
}
System.out.println("Random numbers that aren't repeating...");
List<Integer>list = new ArrayList<Integer>(s);
System.out.println(list);
}
}输出结果
Random numbers that aren't repeating... [-951684393, -2119833673, 1804429247, -1389537752, -1314261216, 575783898, 326063891, -1241554605, -613888875, -1698001241]
让我们来看另一个示例，以获取不会重复的不同随机数-
Random numbers that aren't repeating... [1173054490, -613376175, -1947139369, -840397233, 931136232, 135129829, 1634496580, 13228721, 1929509800, 1205305181]