PoorlyHashedKey

public class PoorlyHashedKey{
    String data;
    public PoorlyHashedKey(String data){
        this.data = data;
    }

    @Override
    public boolean equals(Object o) {
        if (!(o instanceof PoorlyHashedKey)){
            return false;
        }

        PoorlyHashedKey po = (PoorlyHashedKey) o;
        return po.data.equals(data);
    }

    @Override
    public int hashCode(){
        return 7;
    }

    @Override
    public String toString(){
        return data;
    }
}