问按变量对元组进行排序

EN

package prc;

import epsa.Cio;

import java.util.Arrays;

import java.util.Collections;

import java.util.List;

public class Rrc2

{

    public static void main(String[] args)


    {

        int n=0;
        Tupla participants[]= new Tupla[15];
        while(true){    

        Cio.println("Choose what you would like to do");
        Cio.println("Type 1 to:Register a participant");
        Cio.println("Type 2 to:List all the participant's data");
        Cio.println("Type 3 to:List all the participants data by mark");
        Cio.println("Type 4 to:Quit");
    int i;

    i = Cio.readInt();

switch(i)
{
case 1:

    participants[n]= new Tupla();
    Cio.println("Insert dorsal number");
    participants[n].number = Cio.readInt();
    Cio.println("Insert participants name");
    participants[n].name = Cio.readString();
    Cio.println("Insert participants best mark for the year 2012");
    participants[n].bestMark2012 = Cio.readDouble(); 
    Cio.println("Insert participants best mark for the year 2011");
    participants[n].bestMark2011 = Cio.readDouble();
    Cio.println("Insert participants best mark for the year 2010");
    participants[n].bestMark2010 = Cio.readDouble();
    n++;



    break;

case 2:
    int t;

    for(t=0;t<15&&t<n;t++){ 

        Cio.println("name: " + participants[t].name);
        Cio.println("Dorsal number: " + participants[t].number);
        Cio.println("Best Mark 2012: " + participants[t].bestMark2012);
        Cio.println("Best Mark 2011: " + participants[t].bestMark2011);
        Cio.println("Best Mark 2010: " + participants[t].bestMark2010);
        Cio.println("//////////////////////////////////////////////////");
    }



    break;

case 3:

Collections.sort(participants);


break;

case 4:System.exit(0); 
break; 


default: 
    Cio.println("Not valid");

    break;


}
Cio.println("Press enter to continue");
Cio.readString();
}

    }
}