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Java Java Data Structures Efficiency! Add tags to a course

Posted by Dax Stucki
Dax Stucki
1,034 Points

I'm trying to initialize mTags in the constructor but I'm not sure where to get the values to put in the mTags set.

I'm thinking maybe I have to pass in a String "tag"???

com/example/model/Course.java 
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 = ;
  }

  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

Seth Kroger
Seth Kroger
56,413 Points
Seth Kroger
Seth Kroger
56,413 Points

You don't need to pass in any tags, but it does need to be initialized with a default constructor. This will result in an empty set. Don't forget that you have to pick a specific implementation of Set and and the import statement for it.