sorting a List containing Object[] elements

Problem Statement: How can we  sort a List containing Object[] elements?

The Solution:

Ever wondered how to sort a list full of Object[]? The answer is to use a Comparator I have used an anonymous class which implements compare method to sort the List of Object[]

package example.collections;

import java.util.ArrayList;

import java.util.Collections;

import java.util.Comparator;

import java.util.List;

public class Sorting {

       public static void main(String[] args) {

              List<Object[]> list = new ArrayList<Object[]>();

             

              list.add(new Object[]{123, "abc", 212});

              list.add(new Object[]{423, "qwert", 2131});

              list.add(new Object[]{656, "asda", 45});

              list.add(new Object[]{111, "zxcz", 43});

              list.add(new Object[]{10, "poiu", 890});

              Collections.sort(list, new Comparator<Object[]>() {

                     //Used by Collections.sort method to sort the List

                     @Override

                     public int compare(Object[] o1, Object[] o2) {

                           Integer accId1 = (Integer)o1[0];

                           Integer accId2 = (Integer)o2[0];

                           if(accId1 < accId2)

                                  return -1;

                           if(accId1 > accId2)

                                  return 1;

                           return 0;

                     }

              });

             

              for(Object[] obj : list){

                 System.out.println("id= "+obj[0]+", name= "+obj[1]+", val= "+obj[2]);

              }

       }

}