convert list-map to map

# convert list-map to map

result2 (list-map)에서 map을 추출한 뒤, 추출한 map을 result (list-map)로 병합하는 로직

source)

package com.aimir.schedule.task;
 
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
 
public class Test {
 
    public static void main(String[] args) {
 
        Map<String, Object> condition1 = new HashMap<String, Object>();
        Map<String, Object> condition2 = new HashMap<String, Object>();
        List<Map<String, Object>> result = new ArrayList<Map<String, Object>>();
        List<Map<String, Object>> result2 = new ArrayList<Map<String, Object>>();
        
        condition1.put("SYS_ID", "781");
        condition1.put("RELATED_METER", "22");
        condition1.put("NAME", "SSYS");
        condition1.put("METERING_COUNT", "1");
        result.add(condition1);
        
        condition2.put("SYS_ID", "782");
        condition2.put("RELATED_METER", "1");
        condition2.put("NAME", "SSYS");
        condition2.put("METERING_COUNT", "0");
        result2.add(condition2);
        
        System.out.println("result : " + result);
        System.out.println("result2 : " + result2);
        System.out.println("====");
        
        int index = 0;
        for (Map<String, Object> map : result2) {
                for (Map.Entry<String, Object> entry : map.entrySet()) {
                   String key = entry.getKey();
                   Object value = entry.getValue();
                   map.put(key,value);
               }
             index++;
             result.add(map);
        }
        
        System.out.println("result : "  +result);
    }
    
}
 

result)

result : [{SYS_ID=781, RELATED_METER=22, NAME=SSYS, METERING_COUNT=1}]
result2 : [{SYS_ID=782, RELATED_METER=1, NAME=SSYS, METERING_COUNT=0}]
====
result : [{SYS_ID=781, RELATED_METER=22, NAME=SSYS, METERING_COUNT=1}, {SYS_ID=782, RELATED_METER=1, NAME=SSYS, METERING_COUNT=0}]