在java中使用数组生成4个不重复的随机数

import java.util.Arrays;
import java.util.Random;

public class RandomNumberGenerator {
    public static void main(String[] args) {
        int[] randomNumbers = new int[4];
        Random random = new Random();

        for (int i = 0; i < randomNumbers.length; i++) {
            int randomNumber;
            boolean isDuplicate;

            do {
                randomNumber = random.nextInt();
                isDuplicate = false;

                for (int j = 0; j < i; j++) {
                    if (randomNumbers[j] == randomNumber) {
                        isDuplicate = true;
                        break;
                    }
                }
            } while (isDuplicate);

            randomNumbers[i] = randomNumber;
        }

        System.out.println("Generated random numbers: " + Arrays.toString(randomNumbers));
    }
}