자바 LinkedHashMap

개요

map에 입력된 순서를 기억하는 map

• LinkedHashMap 예제

import java.util.*;  
class LinkedHashMap1{  
 public static void main(String args[]){  
  LinkedHashMap<Integer,String> hm=new LinkedHashMap<Integer,String>();  
  hm.put(100,"철수");  
  hm.put(101,"영희");  
  hm.put(102,"민수");  
for(Map.Entry m:hm.entrySet()){  
   System.out.println(m.getKey()+" "+m.getValue());  
  }  
 }  
}

import java.util.*;  
class LinkedHashMap2{  
 public static void main(String args[]){  
   LinkedHashMap<Integer, String> map = new LinkedHashMap<Integer, String>();           
      map.put(100,"철수");    
     map.put(101,"영희");    
     map.put(102,"민수");    
       System.out.println("Keys: "+map.keySet());  
       System.out.println("Values: "+map.values());  
       System.out.println("Key-Value pairs: "+map.entrySet());  
 }  
}

• 제거

import java.util.*;  
class LinkedHashMap2{  
 public static void main(String args[]){  
   LinkedHashMap<Integer, String> map = new LinkedHashMap<Integer, String>();           
      map.put(100,"철수");    
     map.put(101,"영희");    
     map.put(102,"민수");    
     System.out.println("Before invoking remove() method: "+map);     
    map.remove(102);  
    System.out.println("After invoking remove() method: "+map);    
 }  
}