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Start your free trialSimon Andersson
6,880 PointsInitializing a new Set in the constructor?
I don't really get why this isn't working.
Since the Set is already declared as a member varible
private Set<String> mTags;
Shouldn't it be enough to just initialize it like I've done in the constructor?
mTags = new HashSet<String>();
Or am I missing something here? It gives me an error saying "Cannot find Symbol HashSet" with a marker pointing at HashSet
package com.example.model;
import java.util.List;
import java.util.Set;
public class Course {
private String mTitle;
private Set<String> mTags;
public Course(String title) {
mTitle = title;
// TODO: initialize the set mTags
mTags = new HashSet<String>();
}
public void addTag(String tag) {
// TODO: add the tag
}
public void addTags(List<String> tags) {
// TODO: add all the tags passed in
}
public boolean hasTag(String tag) {
// TODO: Return whether or not the tag has been added
return false;
}
public String getTitle() {
return mTitle;
}
}
1 Answer
Cindy Lea
Courses Plus Student 6,497 PointsI believe you need to import the hashset:
import java.util.Hashset;
Simon Andersson
6,880 PointsSimon Andersson
6,880 PointsI tried that but it says
./com/example/model/Course.java:5: error: cannot find symbol import java.util.Hashset; ^
symbol: class Hashset location: package java.util ./com/example/model/Course.java:14: error: cannot find symbol mTags = new HashSet(); ^
Simon Andersson
6,880 PointsSimon Andersson
6,880 PointsNevermind, it worked. I just wrote import "Hashset" instead of "HashSet" this time.
Thanks!