関連ワード:  get value from map java 8    get values from hashmap java 8    get first value from map java 8    get max value from map java 8    get all values from map java 8    get value from list of map java 8    get value from key hashmap java 8    read values from map in java 8    get value from map based on key java 8    how to get value from map in java 8 stream