TreeMap vs Map

[alpdog14]

So I have a TreeMap class that is working fine in that class I have a add method:

public class DefaultIndexImpl extends TreeMap<String, List<Integer>> implements
		Index {

	@Override
	public void add(final String word, final int line) {
		
		if(containsKey(word)){
			get(word).add(line);
		}
		else{
			List<Integer> list = new LinkedList<Integer>();
			list.add(line);
			put(word,list);
		}
}
	}

Now I have to use this same method in a regular Map class:

public class DefaultIndexImpl implements Index {
@Override
	public void add(final String word, final int line) {
		// TODO your job
		if(contains(word)){
			get(word).add(line);
		}
		else{
			List<Integer> list = new LinkedList<Integer>();
			list.add(line);
			put(word,list);
		}
	}
}

The issue I am having is that Eclipse is telling me that I need to add a get and put method but in my original TreeMap class I did not have to do this. For regular Map class do I have to instantiate get() and put() or should this function be in that type?

[Fubarable]

If you're talking about the core Map, it is not a class but an interface and would require that you implement ALL of its declared methods,... many more than just put and get. But a question for you, what is the Index interface? Does it require that you have get and put methods?

[alpdog14]

Here is my Index class:

package occurences;

import java.util.List;
import java.util.Map;

public interface Index extends Iterable<Map.Entry<String, List<Integer>>> {

void add(String word, int line);

boolean contains(String word);

int frequency(String word);

List<Integer> lines(String word);

void clear();

int size();
}

So would I add put() and get() in this class?

[Fubarable]

Here is my Index class:

package occurences;

import java.util.List;
import java.util.Map;

public interface Index extends Iterable<Map.Entry<String, List<Integer>>> {

	void add(String word, int line);

	boolean contains(String word);

	int frequency(String word);

	List<Integer> lines(String word);

	void clear();

	int size();
}

So would I add put() and get() in this class?

Any class that implements this interface will have to implement all of the methods of this interface including put, get, frequency, clear, size, lines, contains,... etc.

[alpdog14]

so would i add the put and get to the interface class or the DefaultIndexImpl

[Fubarable]

You want to look at a tutorial on using interfaces. Here's one: Interfaces