mapTest

import java.util.*;

public class mapTest {

    public static void main(String[] args) throws Exception{
        List<Map<String,Object>> list = new ArrayList(){
            {
                add (new HashMap(){{put("a","1");put("","0");}});
                add (new HashMap(){{put("a","11");put("b","2");}});
                add (new HashMap(){{put("a","111");put("c","3");}});
                add (new HashMap(){{put("b","22");}});
                add (new HashMap(){{put("a","1111");put("b","222");}});
            }
        };

    sort(list);
    }

    private static void sort(List<Map<String,Object>> l) {
        int temp = 0;
        List<Map<String,Object>> l1= new ArrayList<>();

        for (int k = 0; k < l.size(); k++) {
            String s = (String) l.get(k).get("a");
            if (s != null) {

                l1.add(l.get(k));
                //int a = Integer.parseInt(s);

            }
        }
        int[] arr = new int[l1.size()];
        for(int m=0;m<l1.size();m++){
            String s = (String) l1.get(m).get("a");
            arr[m] = Integer.parseInt(s);
        }

        for (int i = 0; i < arr.length; i++) {

            for (int j = i + 1; j < arr.length; j++) {

                if (arr[i] > arr[j]) {

                    temp = arr[i];

                    arr[i] = arr[j];

                    arr[j] = temp;
                }
            }
        }

        for (int i = 0; i < l1.size(); i++) {
            System.out.println(arr[i]+"="+l1.get(i));
            //System.out.println(l1.get(i));
        }

    }
}