public interface Lookup<T>{
  public T find(String name);
}

public class IntegerLookup implements Lookup<Integer>{
  private Integer[] values;
  private String[] names;

  public IntegerLookup(String[] names, Integer[] values) {......}
  //now I want to write the implemented method - find

public Object find(String name){...}

public Integer find(String name){...}