public class guessMovies {
private Random randomGenerator;
public static void main(String[] args) throws IOException {
String MovieList = null;
try (BufferedReader br = new BufferedReader(new FileReader("Movielist.txt"))) {
while ((MovieList = br.readLine()) != null) {
ArrayList<String> MovieNames = new ArrayList<String>();
MovieNames.addAll(Arrays.asList(MovieList));
//System.out.println(MovieList);
System.out.println(MovieNames);
Random r = new Random();
System.out.print(MovieNames.get(r.nextInt(MovieNames.size)));
}
}
catch(FileNotFoundException exception) {
System.out.println("I cannot find your file");
}
//pick random movie
}
有人可以指导我如何选择在Movielist文件随机电影标题,我可以打印出整个列表,但我不知道如何选择其中一个随机。检索随机元素的ArrayList中
是System.out.print'(MovieNames.get(r.nextInt(MovieNames.size)))'...这是已经非常接近你所需要的。问题是什么? –
放行:System.out.print(MovieNames.get(r.nextInt(MovieNames.size)));读取循环之外(并将大括号()添加到size())。 –