找出数组中每个元素相对其他元素的大小

import java.io.File;
import java.io.FileWriter;
import java.util.ArrayList;
import java.util.Scanner;

/*repeat exception class*/
class RepeatException extends Exception{    

    private static final long serialVersionUID = 1L;
    
    static String str = "elements can not repeat!!!";
    
    /*constructor*/
    RepeatException()
    {
        super.printStackTrace();
        System.out.println(str);
    }

}

public class WhatIsMyNumber {
    /**
     * 
     * @param al -- ArrayList store elements in original double array
     * @param positionInfo -- ArrayList store position information, for example, al = {1,2,1}
     * then, positionInfo = {0,1,0}, the second 0 means the relative order of this elements is
     * store in the first position of result (return by computeNumber)
     * @return
     */
    public static ArrayList<Double> deleteRepeat(ArrayList<Double> al, ArrayList<Integer> positionInfo){
        
        ArrayList<Double> temp = new ArrayList<Double>();
        //flag record position information
        int flag = 0;
        
        for(int i = 0; i < al.size(); i++)
        {
            if(temp.contains(al.get(i)))
            {
                positionInfo.add(temp.indexOf(al.get(i)));
            }
            else
            {
                positionInfo.add(flag);
                flag++;
                temp.add(al.get(i));
            }
        }
        return temp;
    }
    
    /**
     * 
     * @param noRepeatArray ArrayList after delete repeat elements
     * @return return the relative order of every element in noRepeatArray
     * @throws Exception throw exception if repeat elements are found in noRepeatArray
     */
    public static int[] computeNumber(ArrayList<Double> noRepeatArray) throws Exception{
        
        int[] result = new int[noRepeatArray.size()];
        for(int i = 0; i < result.length; i++)
        {
            result[i] = 1;
        }
        
        for(int i = 0; i < noRepeatArray.size(); i++)
        {
            for(int j = i+1; j < noRepeatArray.size(); j++)
            {
                if(noRepeatArray.get(i) < noRepeatArray.get(j))
                    result[j]++;
                if(noRepeatArray.get(i) > noRepeatArray.get(j))
                    result[i]++;
                if(noRepeatArray.get(i) == noRepeatArray.get(j))
                    throw new RepeatException();
            }
        }
        
        return result;
    }
    
    public static void outputResult(double[] test){
        
        double[] output = new double[test.length];
        ArrayList<Double> al = new ArrayList<Double>();
        ArrayList<Integer> positionInfo = new ArrayList<Integer>();
        for(int i = 0; i < test.length; i++)
        {
            al.add(test[i]);
        }
          
        al = deleteRepeat(al,positionInfo);
        try
        {
            int[] result = computeNumber(al);
            for(int i = 0; i < output.length; i++)
            {
                output[i] = result[positionInfo.get(i)];
                System.out.print(output[i] + " ");
            }
            
            System.out.println();
        }
        catch(Exception e)
        {
            e.printStackTrace();
        }
    }
    
    public static void main(String[] args){
        
        double[] test = new double[]{8,8,8,2.5,8,8,2.5,8,13,15,12,2.5,15,2.5,8,15};
        outputResult(test);
    }