Java programming

@SuppressWarnings("rawtypes") public class Pair<T, S> implements Comparable { public T first; public S second; public Pair(T f, S s) { first = f; second = s; } public Pair() { first=null; second=null; } @Override public String toString() { return "(" + first.toString() + ", " + second.toString() + ")"; } @SuppressWarnings("unchecked") @Override public boolean equals(Object o) { Pair<T,S> other=(Pair<T,S>)o; if (first.getClass().equals(Integer.class)&&second.getClass().equals(Integer.class)) return ((((Integer)first).intValue()==((Integer)other.first).intValue())&& (((Integer)second).intValue()==((Integer)other.second).intValue())); return ((this.first.equals(other.first))&&(this.second.equals(other.second))); } @Override public int hashCode() { if (first.getClass().equals(Integer.class)&&second.getClass().equals(Integer.class)) return ((Integer)first).intValue()<<16|(((Integer)second).intValue()&32767); else if (first.getClass().equals(String.class)&&second.getClass().equals(Integer.class)) return ((String)first+","+(Integer)second).hashCode(); else if (first.getClass().equals(String.class)) return ((String)first+","+(String)second).hashCode(); else return first.hashCode()+second.hashCode(); } @SuppressWarnings("unchecked") @Override public int compareTo(Object otherObject) { Pair<T,S> other=(Pair<T,S>) otherObject; if ((first.getClass().equals(Integer.class))&&(second.getClass().equals(Integer.class))) if (((Integer)first).intValue()!=((Integer)other.first).intValue()) return (((Integer)first).intValue()-((Integer)other.first).intValue()); else return (((Integer)second).intValue()-((Integer)other.second).intValue()); throw new RuntimeException("Not implemented."); } }