//sortTest.java -- by tsaiwn@csie.nctu.edu.tw
import java.io.*;
import java.util.*;
class Stu implements Comparable {
    long sid;
    double height;
    double wet;
    Stu(long a, double b, double c) {sid=a; height=b; wet=c;}
    public int compareTo(Object o2){
        Stu b = (Stu) o2;
        if(sid > b.sid) return 1;   // ascending order
        else if(sid < b.sid) return -1;
        return 0;
    }
}; // struct Stu
class sortTest {
   static int yyy[ ] = { 1, 2, 3, 4, 5, 6 };
   static Stu x[ ] = {  new Stu(921, 175.0, 60.0),  new Stu(911, 172.0, 58.0), 
       new Stu(933, 168., 58.), new Stu(915, 168.5, 56.8), 
       new Stu(938, 170.0, 68.5) };
   public static void main(String xxx[ ]) {
       cout.println("Original data ..");
       print(x); 
       cout.println("After Arrays.sort(x)");
       Arrays.sort(x);  print(x);
       SortAA<Stu> ar3 = new SortAA<Stu> ( );
       cout.println("After Arrays.sort(x, 0, x.length, ar3)");
       Arrays.sort(x, 0, x.length, ar3); print(x);   
//
       SortBB lee4 = new SortBB( );
       cout.println("After Arrays.sort(x, 0, x.length, lee4)");
       Arrays.sort(x, 0, x.length, lee4); print(x);        
   } // main
   static PrintStream cout=System.out;
   static void print(Stu y[ ]) {     
      for(int i=0; i < y.length; ++i) {
         cout.println(""+y[i].sid + "  " + y[i].height +
               "  " + y[i].wet);
      } // for
      cout.println("=== ===");
   }
} // sortTest
class SortAA<T> implements Comparator<T>  {
    public int compare(T aa, T bb) {
       Stu a = (Stu)aa; Stu b = (Stu)bb;
       if(a.height < b.height) return 1;   // height Descending
       else if(a.height > b.height) return -1;// compare other field ?
       if(a.sid > b.sid) return 1;
       else if(a.sid < b.sid) return -1;
       return 0;  // equals
    } // compare
} // SortAA
class SortBB implements Comparator  {
    public int compare(Object aa, Object bb) {
       Stu a = (Stu)aa; Stu b = (Stu)bb;
       if(a.wet < b.wet) return 1;   // wet Descending
       else if(a.wet > b.wet) return -1;// compare other field ?
       if(a.sid > b.sid) return 1;
       else if(a.sid < b.sid) return -1;
       return 0;  // equals
    } // compare
} // SortBB