bubbleSort for Competitor[] array attributes?

[AZRebelCowgirl73]

Ok I think I have added the bubbleSort methods correctly I am not getting any errors and the program runs as if I had not added them yet! My question is this! how would I now in the main method implement the shortBubble() so that it could sort the array?

Here is my code!

import java.lang.*;
import java.util.*;
import java.io.*;
import ch10.*;
 
public class ContestManagement {
 
    //define local variables
    static final int MAX_LENGTH = 20;
    static Competitor competitorArray[] = new Competitor[MAX_LENGTH];
    static int arraySize = 0;
 
    //define method swap for bubbleSort
    static public void swap(int index1, int index2) {
      //precondition: index 1 and index 2 are >= 0 and < MAX_LENGTH
      //swaps the integers at locations index1 and index2 of the competitorsArray
      Competitor temp = competitorArray[index1];
      competitorArray[index1] = competitorArray[index2];
      competitorArray[index2] = temp;
    }
 
    //define method bubbleUp2 for bubbleSort
    static boolean bubbleUp2(int startIndex, int endIndex) {
      //switches adjacent pairs that are out of order
      //between values[startIndex]...values[endIndex]
      //beginning at values[endIndex]
      //returns false if a swap was made: otherwise, returns true.
      boolean sorted = true;
      for (int index = endIndex; index > startIndex; --index) 
            if (competitorArray[index].compareTo(competitorArray[index - 1]) < 0) {
                  swap(index, index - 1);
                  sorted = false;
            }
      return sorted;            
    }
 
    //define method shortBubble for bubbleSort
    static void shortBubble() {
      //sorts the values array using the bubble sort algorithm
      //the process stops as soon as values is sorted
      int current = 0;
      boolean sorted = false;
      while ((current < (MAX_LENGTH - 1)) && !sorted) {
            sorted = bubbleUp2(current, MAX_LENGTH - 1);
            ++current;
      }
    }
 
    //define main method
    public static void main (String [] args)  throws IOException{
 
 
      Scanner stdin = new Scanner(System.in);
 
      //set up file stream
        Scanner fileIn = null;
 
      //read and process the file Competitors.txt
      try {
           my code is here...
          }
      }
      catch (InputMismatchException e) {
            System.out.println("uh oh, got an exception error!");
            }
 
      //read and process the file Marks.txt
      //when same ID is found mark is reset to new value
      //display unsorted list of competitors
      try {
            my code is here
            }
            for (int i = 0; i < arraySize; ++i) {
                  System.out.println(competitorArray[i]);
            }
      }
      catch (NullPointerException e) {
            System.out.println("uh oh, got an exception error!");
            }      
    }
}   

[r035198x]

That method is in a class called ContestManageme nt. To call it in main ,you may create an instance of the ContestManageme nt class.

[JosAH]

Judging from your code a Competitor already implements the Comparable
interface so why not use the Arrays.sort() method to sort that array? A bubble
sort algorithm is so newbee Pascalian or Fortranesque ;-)

kind regards,

Jos