Java Data Type - 如何创建一个随机字符串

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

public class Main {
  public static String randomMessages[] = { "Message 1",
      "Message 2", "LOL", "asdf" };

  public static void main(String[] args) {
    int howManyWords = 2;
    List<String> listOfWords = new ArrayList<>();
    Random random = new Random();
    listOfWords.addAll(Arrays.asList(randomMessages));
    List<String> selectedRandomMessages = new ArrayList<>();
    for (int i = 0; i < howManyWords; i++) {
      int randomNumber = random.nextInt(listOfWords.size());
      String randomItem = listOfWords.get(randomNumber);
      selectedRandomMessages.add(randomItem);
      listOfWords.remove(randomItem);
    }
    System.out.println(selectedRandomMessages);
  }
}