Maps may be generic. : generics « Utility Classes « SCJP

1. SCJP
2. Utility Classes
3. generics

import java.util.TreeMap;

public class MainClass {
  public static void main(String[] argv) {
    TreeMap<String, MyClass> nameToClass;
    nameToClass = new TreeMap<String, MyClass>();

    System.out.println();
  }
}

class MyClass {
}