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I have an array:
File [] temp=null; And I have an arrayList of File type:
List <File> tempList = new ArrayList <File>(); Now I want to add the content from temp to tempList. So anyone can please tell me How do I this?
693
collect(Collectors. toList()); This code says for each member of the list turn it into 4 copies of the item then collect all those as a list and add them to the original list.
ArrayList allows duplicate values while HashSet doesn't allow duplicates values. Ordering : ArrayList maintains the order of the object in which they are inserted while HashSet is an unordered collection and doesn't maintain any order.
This Java code reads in each word and puts it into the ArrayList: Scanner s = new Scanner(new File("filepath")); ArrayList<String> list = new ArrayList<String>(); while (s. hasNext()){ list. add(s.
We can convert an array to arraylist using following ways. Using Arrays. asList() method - Pass the required array to this method and get a List object and pass it as a parameter to the constructor of the ArrayList class.
Try this
tempList.addAll(Arrays.asList(temp)); If you are not going to update the content of the array (add/removing element), it can be as simple as
List<File> tempList = Arrays.asList(temp); Of course, if you want a list that you can further manipulate, you can still do something like
List<File> tempList = new ArrayList<File>(Arrays.asList(temp)); If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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