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How can I turn a List of Lists into a List in Java 8?

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春和景丽
春和景丽 2020-11-22 04:49

If I have a List>, how can I turn that into a List that contains all the objects in the same iteration order
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  • 攒了一身酷
    攒了一身酷 (楼主)
    2020-11-22 05:27

    You can use the flatCollect() pattern from Eclipse Collections.

    MutableList> list = Lists.mutable.empty();
MutableList flat = list.flatCollect(each -> each);



    If you can't change list from List:
    


    List> list = new ArrayList<>();
List flat = ListAdapter.adapt(list).flatCollect(each -> each);



    Note: I am a contributor to Eclipse Collections.
    
    
    
             
    
                                                        
    
            
            
    
              
                
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