java multiple List merge [closed]

Multi tool use
Multi tool use


java multiple List<Entity> merge [closed]



I'd like to make two lists, Entity.
Entity1 and Entity2 are the same as the AA Date Object and the rest are different.



List list1;
List list2;



list1 = [{
"AA" : "2018-06-25",
"BB" : 10,
"CC" : 20
},{
"AA" : "2018-06-26",
"BB" : 20,
"CC" : 30
},{
"AA" : "2018-06-27",
"BB" : 30,
"CC" : 30
}]



list2 = [{
"AA" : "2018-06-25",
"DD" : 1
}, {
"AA" : "2018-06-28",
"DD" : 2
}]



Entity1 and Entity2 are the same as AA Date Object only.
We would like to :
If possible, I want to use Java 8 grammar. What should I do?



output merge result
[{
"AA" : "2018-06-25",
"BB" : 10,
"CC" : 20,
"DD" : 1
},{
"AA" : "2018-06-26",
"BB" : 20,
"CC" : 30,
"DD" : null
},{
"AA" : "2018-06-27",
"BB" : 30,
"CC" : 30,
"DD" : null
},{
"AA" : "2018-06-28",
"BB" : 30,
"CC" : 30,
"DD" : 2
}]



Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.





Looks like you've forgot to add a question
– Cid
Jul 2 at 8:55





Do have a look at this stackoverflow.com/help/how-to-ask
– Pramod
Jul 2 at 9:23






format added explanation of question
– Arijit Mukherjee
Jul 2 at 10:11





sorry! I'm not good English. I want to get the result of two lists as one and know how.
– ChangHyun Seong
Jul 2 at 10:26




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