자바 LinkedHashMap

개요

map에 입력된 순서를 기억하는 map

• LinkedHashMap 예제

Java

CPU

1.6s

MEM

78M

1.0s

Copy

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());  
  }  
 }  
}

100 철수
101 영희
102 민수

Java

CPU

1.4s

MEM

82M

0.9s

Copy

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());  
 }  
}

Keys: [100, 101, 102]
Values: [철수, 영희, 민수]
Key-Value pairs: [100=철수, 101=영희, 102=민수]

• 제거

Java

Copy

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);    
 }  
}

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