关于java容器的作为数据内存的情况

package test.com.erayt.eds.risk.service;

import java.util.Map; import java.util.concurrent.ConcurrentHashMap;

import com.erayt.eds.domain.risk.RiskLimitField;

public class Mapdata { private Map<String, String> dataMap = new ConcurrentHashMap<>();

/**
 * @param args
 */
public String getValue(String key) {
    return dataMap.get(key);
}

public Map<String, String> getDataMap() {
    return dataMap;
}

public void setDataMap(Map<String, String> dataMap) {
    this.dataMap = dataMap;
}

public void putMapData() {
    dataMap.put("111", "AAAA");
}

}

期待研究