ZCW-PhoneBook/PhoneBook.java

 

import java.util.ArrayList;
import java.util.Map;
import java.util.TreeMap;

/**
 * Created by leon on 1/23/18.
 */
public class PhoneBook {
    public static void main (String[] args){

    }


    private Map<String, ArrayList<String>> directory;

    public PhoneBook (){
        directory= new TreeMap< String, ArrayList<String>>();

    }
    public  void setValues(String name, ArrayList<String>phonenumber){
        this.directory.put(name, phonenumber);
    }


    public boolean hasEntry(String name) {

return directory.containsKey(name);

}

    public void add(String name, String number) {
        ArrayList<String> contact = new ArrayList<>();
        contact.add(number);
        directory.put(name,contact);

    }



    public ArrayList<String> getContact(String name) {
         return directory.get(name);
     }
     public String reverseLookUp(String number){
        String repply= "Not here";
        for (String name:directory.keySet()){
            ArrayList<String> reverse= directory.get(name);
            for (String looking: reverse){
                if (looking.equals(number)){
                     repply= name;
                }
            }
        }
        return repply;
     }

     public  void  remove (String name){
        if (directory.containsKey(name)){
            directory.remove(name);
        }
     }

    public String listNameAndNumbers() {
        StringBuilder builder = new StringBuilder();
        for (String name:directory.keySet()){
            for (int i= 0; i< directory.get(name).size(); i++){
                builder.append(name + " " + directory.get(name).get(i) + "\n");
            }
        }
        return builder.toString();
    }


    public Map<String, ArrayList<String>> getDirectory() {
        return directory;
    }
    public Map<String, ArrayList<String>> getContact() {
        return directory;
    }


    public void setDirectory(Map<String, ArrayList<String>> directory) {
        this.directory = directory;
    }



}