import java.util.*;
import java.io.*;
import java.lang.*;

public class Segment { 

  public static final int maxSegmentLength = 4;
    // hardwired in code :(

  Word [] words;
  
  public Segment(Word w1)
    { words = new Word [1]; words[0]=w1;
    };
  public Segment(Word w1,Word w2)
    { words = new Word [2];words[0]=w1;words[1]=w2;
    };
  public Segment(Word w1,Word w2,Word w3)
    { words = new Word[3];words[0]=w1;words[1]=w2;words[2]=w3;
    };
  public Segment(Word w1,Word w2,Word w3,Word w4)
    { words = new Word[4];words[0]=w1;words[1]=w2;words[2]=w3;words[3]=w4;
    };
  
  public boolean isInteresting()
    { if(words[0].isStopword()) return false;
      if(!words[words.length-1].isContentWord()) return false;
      return true;};

  public String toString()
     {String s ="";
      for(int i=0; i<words.length; i++)
         s= s + " " + words[i];
      return s;
     }
 
  public boolean equals(Object rhs){
    if(rhs==null || getClass() != rhs.getClass())
      return false;
    if(words.length != ((Segment)rhs).words.length)
      return false;
    for(int i=0; i<words.length; i++)
      if(!words[i].equals( ((Segment)rhs).words[i]))
        return false;
    return true;
   };

  public int hashCode()
    {int sum=0;
     for(int i=0; i<words.length; i++)
       {sum+= words[i].hashCode(); };
     return sum;
    };
    
  public static void main(String [] args) {
     Word w1= new Word("hund");
     Word w2= new Word("dum");
     Word w3= new Word("the");
     Word w2x= new Word("dum");
     Segment s = new Segment(w1,w2,w3);
     Segment ss = new Segment(w1,w2x,w3);
     System.out.println(s + " " + ss);
     if(s.equals(ss)) System.out.println("EQ");
     System.out.println(s.hashCode() + " " +  ss.hashCode());
     }

}