package lambda;

import java.util.*;

/**

* Created by Edwin Xu on 5/3/2020 4:26 PM

*/

public class MethodReference {

public static void main(String[] args) {

String s[] = {"sd","fgfgfg"};

Arrays.sort(s,String::compareToIgnoreCase);

for (String i:s) System.out.println(i);

ArrayList<Integer> a = new ArrayList<>();

a.add(1);

a.add(12);

a.forEach(System.out::println);

int arr[] = {1,1,1,1,23,2,32332,234,3,434,342,32,32,323,4,44,4};

Map<Integer,Integer> map = new HashMap<>();

for (int i : arr) {

map.merge(i,1,Integer::sum);

}

for (Map.Entry<Integer,Integer> e : map.entrySet()) {

System.out.println(e.getKey()+":"+e.getValue());

}

int [] arr1 = {1,2,2,3,3,3};

Map<Integer,Integer> m = new HashMap<>();

for (int i : arr1) {

m.merge(i,1,(aa,b)->(aa+b));

// m.merge(i,1,Integer::sum);

}

for (Map.Entry<Integer,Integer> e : m.entrySet()) {

System.out.println(e.getKey()+":"+e.getValue());

}

}

}