小白筆記------------------Map的用法

package Guess_Numbers;

import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;

public class Guess_Numbers {
	static Map<String,Integer> map1 = new HashMap<String,Integer>();
	static Map<String,Integer> map2 = new HashMap<String,Integer>();
	static Map<String,Integer> map3 = new HashMap<String,Integer>();
	public void init1(){
		map1.put("6403", 2);
		map1.put("3659", 2);
		map1.put("0197", 1);
		map1.put("8964", 1);
		map1.put("5830", 22);
		map1.put("1386", 2);
	}
	public void init2(){
		map2.put("3729", 20);
		map2.put("1697", 2);
		map2.put("7812", 2);
		map2.put("4129", 20);
		map2.put("5268", 1);
		map2.put("2931", 3);
	}
	public void init3(){
		map3.put("3419", 2);
		map3.put("8345", 2);
		map3.put("5974", 11);
		map3.put("6723", 1);
		map3.put("7081", 1);
		map3.put("9837", 2);
	}
	public void get_answer(Map<String , Integer> map){
		String answer = "";
		int count = 0;
		int result = 0;
		for(int i = 1234;i < 9999;i++){
			String s  = i + "";
			count = 0;
			for (String key : map.keySet()) {
				 result = 0;
				   for(int j = 0; j < 4;j++){
					   if(s.charAt(j) == key.charAt(j)){
						   result++;
						   
					   }
					   //System.out.println(result);
				   }
				   result = result * 10;
				   for(int j = 0;j < s.length();j++){
					   for(int k = 0;k < key.length();k++){
						   if(s.charAt(j) == key.charAt(k) && k!=j){
							   result++;
							  // System.out.println(result);
						   }
					   }
				   }
				   //System.out.println(result);
				   if(result == map.get(key)){
					   count++;
					   //System.out.println(count);
				   }
				   
			 }
			if(count == 6){
				 answer = s;
				 break;
		   }
		   
			 
			 
		}
		System.out.println(answer);
	}
	
	
	public static void main(String[] args) {
		Guess_Numbers one  = new Guess_Numbers();
		one.init1();
		one.get_answer(map1);
		one.init2();
		one.get_answer(map2);
		one.init3();
		one.get_answer(map3);
		
	}
	
	
}
包含了遍歷和賦值