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Start your free trialDax Stucki
1,034 PointsI've created the method to add a tag to mTags. How do I add all the tags using the addTags method?
I think what I have to do is add List items to a HashSet. I'm just not sure how...
thanks Dax
package com.example.model;
import java.util.HashSet;
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
mTags.add(tag);
}
public void addTags(List<String> tags) {
// TODO: add all the tags passed in
mTags = mTags.add(tags);
}
public boolean hasTag(String tag) {
// TODO: Return whether or not the tag has been added
return false;
}
public String getTitle() {
return mTitle;
}
}
2 Answers
Daniel Santos
34,969 PointsHey Dax,
I took a look at your code, and problem that I noticed is that you are trying to add a List<String> in to a HashSet<String>, so that won't work. Here is an example of something that worked for me. I used an enhanced for loop;
public void addTag(String tag) {
// TODO: add the tag
mTags.add(tag);
}
public void addTags(List<String> tags) {
// TODO: add all the tags passed in
for (String tag : tags) {
mTags.add(tag);
}
}
public boolean hasTag(String tag) {
// TODO: Return whether or not the tag has been added
return mTags.constains(tag;
}
If you have any question let me know
Steve Hunter
57,712 PointsIn the hasTag
method, you need to tidy up your code a little. The concept is correct but the code isn't quite right. Rather than having:
return mTags.constains(tag;
change that to:
return mTags.contains(tag);
Steve.