makeItAnagram.java

import java.io.*;
import java.util.*;
import java.text.*;
import java.math.*;
import java.util.regex.*;

public class Solution {

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        String src = (in.nextLine());
        String tar = in.nextLine();
        int length = 0;       
        Map<Character, Integer> an = new HashMap <Character, Integer>();   

        for (int i = 0; i < src.length(); i++){         
            char c = src.charAt(i);         
            if (an.containsKey(c))
                an.put(c, an.get(c) + 1);
            else
                an.put(c, 1);         
        }

        for (int j = 0; j < tar.length(); j++){         
            char c = tar.charAt(j);               
            if (an.containsKey(c) && an.get(c) != 0 ) {
                an.put(c, an.get(c) - 1);
                length += 2;
            }
        }
        System.out.println((src.length()+tar.length())-length);

    }