Given an arbitrary ransom note string and another string containing letters from all the magazines, write a function that will return true if the ransom note can be constructed from the magazines ; otherwise, it will return false.

Each letter in the magazine string can only be used once in your ransom note.

Note:

canConstruct("a", "b") -> falsecanConstruct("aa", "ab") -> falsecanConstruct("aa", "aab") -> true

public class Solution {    	public  boolean canConstruct(String ransomNote, String magazine) {		   if (magazine == null)			   return false;		   if (ransomNote == null)			   return false;		   if (ransomNote.length() == 0 && magazine.length() == 0) 			   return true;		   List
    
      list = new ArrayList
     
      ();		   for (char c : magazine.toCharArray()) {			   list.add(Character.valueOf(c));		   }		   if (ransomNote.length() == magazine.length()) {			   for (int i = 0; i < ransomNote.length(); i++) {				   if (!list.remove(Character.valueOf(ransomNote.charAt(i)))) {					   return false;				   }			   }			   return true;		   } else {			   for (int i = 0; i < ransomNote.length(); i++) {				   if (!list.remove(Character.valueOf(ransomNote.charAt(i)))) {					   return false;				   }			   }			   if (list.size() > 0) {				   return true;			   }		   }	       return false;	}}