在Java中传递2D数组列表
有人能告诉我如何为这个2D ArrayList设置getter和setter吗
public class PureRatings {
private List<List<Integer>> pureRatingsList;
我不确定这部分是否正确
public PureRatings() throws IOException {
pureRatingsList = parseRatingsFile();
}
这是2D ArrayList其余部分的代码,我不知道是否应该包含它
public static List<List<Integer>> parseRatingsFile() throws IOException {
List<List<Integer>> pureRatings = new ArrayList<List<Integer>>();
BufferedReader in = new BufferedReader(new FileReader("Ratings.txt"));
String ratingsLine = null;
while ((ratingsLine = in.readLine()) != null) {
pureRatings.add(parseRatingsLine(ratingsLine));
}
in.close();
return pureRatings;
}
public static List<Integer> parseRatingsLine(String ratingsLine) throws IOException {
List<Integer> ratings = new ArrayList<Integer>();
if (ratingsLine == null) {
return ratings;
}
String[] ratingsStrArr = ratingsLine.split(" ");
try {
for (final String ratingStr : ratingsStrArr) {
ratings.add(Integer.parseInt(ratingStr));
}
} catch (NumberFormatException e) {
System.out.println(e.getMessage());
}
return ratings;
}
}
# 1 楼答案
您将获得如下条目:
您可以这样设置一个条目:
# 2 楼答案