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Chris Gauthier
Courses Plus Student 6,434 PointsInitializing a set in a constructor
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, Set<String> newTags) {
mTitle = title;
// TODO: initialize the set mTags
mTags = newTags;
}
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;
}
}
Why doesn't this work?
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, Set<String> newTags) {
mTitle = title;
// TODO: initialize the set mTags
mTags = newTags;
}
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;
}
}
2 Answers
Grigorij Schleifer
10,365 PointsHi Chris,
for the first challenge you were asked to initialize mTags in the constructor. For this, You don't need to pass Set<String> newTags into the constructor. Just initialize mTags variable within the constructor. For that, use HashSet. And also make sure that HashSet is included as an import at the top.
public Course(String title) {
mTitle = title;
// TODO: initialize the set mTags
mTags = new HashSet<String>();
}
Does it make sense?
Chris Gauthier
Courses Plus Student 6,434 PointsGreat, that worked fine, thanks!
Grigorij Schleifer
10,365 PointsNICE!!!! Glad to hear that, Chris ...