関連ワード:  java 8 unique list of objects    java 8 list of objects to map    java 8 get unique values from list of objects    java 8 sort list of objects    java 8 sort list of objects by multiple attributes descending    java 8 foreach list of objects    java 8 sort list of objects by field    java 8 foreach list of objects with condition    java 8 filter list of objects by property    java 8 sort list of objects by date descending