Table.java

package Table;

import java.util.ArrayList;

/**
 * This class needs to manage an ArrayList of Entry objects.  It needs a get method that takes a key and returns
 * its corresponding value, or null of the key is not in the arraylist.  It needs a put method that takes a key and value
 * and makes an entry with key, value.  NOTE: There cannot be two entries with the same key.
 * It also needs a remove method which takes a key and, if that key exists in the arraylist, removes that item.
 * Void return on `remove`.
 */
public class Table<K, V> {
    private ArrayList<Entry<K,V>> entries;

    public Table() {
        entries = new ArrayList<>();
    }
    public V get(K key){
        Entry<K,V> current = findEntry(key);
        if (current == null){
            return null;
        }
        return current.getValue();
    }
    public void put(K key, V value){
        Entry<K,V> current = findEntry(key);
        if(current != null) {
            this.remove(key);
        }
        entries.add(new Entry<>(key, value));
    }
    public boolean remove(K key){
        Entry<K, V> currentEntry = findEntry(key);
        if (currentEntry == null) {
            return false;
        }
        int index = entries.indexOf(currentEntry);
        entries.remove(index);
        return true;
    }
    private Entry<K, V> findEntry(K key){
        for (Entry<K,V> entry : entries){
            if (entry.getKey().equals(key)){
                return entry;
            }
        }
        return null;
    }
}