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Start your free trialDamjan Vlaic
19,244 Points---JAVA---
Can someone help me fix this hasTag method :)
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
for (String tag : tags) {
mTags.add(tag);
}
}
public boolean hasTag(String tag) {
// TODO: Return whether or not the tag has been added
}
public String getTitle() {
return mTitle;
}
}
1 Answer
andren
28,558 PointsThe set
interface has a method called contains
that checks if a given object is present in the set you call it on.
By using that like this:
public boolean hasTag(String tag) {
return mTags.contains(tag);
}
You can easily solve the challenge. Also while your addTags
method works fine it's worth mentioning for future reference that the Set
interface also has a method called addAll
which automatically adds all objects from a collection to the set. So you don't really need to loop through the list you get in the addTags
method, you can just call addAll
like this:
public void addTags(List<String> tags) {
mTags.addAll(tags);
}
Damjan Vlaic
19,244 PointsDamjan Vlaic
19,244 Pointsthat helped a lot, tnx for helping man ;)