// Textbook fragment 02.A.02
public class Pair<K, V> {
  K key;
  V value;
  public void set(K k, V v) {
    key = k;
    value = v;
  }
  public K getKey() { return key; }
  public V getValue() { return value; }
  public String toString() {
    return "[" + getKey() + ", " + getValue() + "]";
  }
  public static void main (String[] args) {
    Pair<String,Integer> pair1 = new  Pair<String,Integer>();
    pair1.set(new String("height"), new Integer(36));
    System.out.println(pair1);
    Pair<Student,Double> pair2 = new  Pair<Student,Double>();
    pair2.set(new Student("A5976","Sue",19), new Double(9.5));
    System.out.println(pair2);
  }
}