Eclipse

public class NameManager implements INameManager {
       private Set namePool = new HashSet();
      

    public String generateName(String nameType) {

        if (!namePool.contains(nameType)) {
       namePool.add(nameType);
        return nameType;
  }

  int i = 1;
  while (namePool.contains(nameType + i)) {
   i++;
  }
  namePool.add(nameType + i);
  return nameType + i;
 }