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Original file line number Diff line number Diff line change
Expand Up @@ -22,6 +22,7 @@
import java.util.Stack;
import java.util.TreeMap;
import java.util.TreeSet;
import java.util.concurrent.ConcurrentHashMap;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
Expand Down Expand Up @@ -110,7 +111,7 @@ public class ERXProperties extends Properties implements NSKeyValueCoding {
*
* <div class="ja">タイプ変換されている値を内部でキャシュし、何回も同じ変換をする必要なくなります</div>
*/
private static Map<String, Object> _cache = Collections.synchronizedMap(new HashMap<>());
private static Map<String, Object> _cache = new ConcurrentHashMap<>();


/**
Expand Down