I want to pick first N elements from a list in java
String[] ligature = new String{there,is not,a,single,person,who,knows,the,answer};
Now I want to pick first 5 elements from this.something like
Stiring[] selectedLigature = ligature[0:4];
I want to do it without using for loop.
Do not stream this simple case, there is subList for this:
// for a List
yourList.subList(0, 5)...
// for an array
Arrays.copyOfRange
subList is almost always better, but tricky as you can modify the original list by accident as it is just a view on the List.
Arrays.copyOfRange for such a caseCollections.unmodifiableList will return an list that cannot be modified. Arrays.copyOfRange will also not deep-copy the elements inside?System.arrayCopy does not do a deep copy.Arrays class has a method for this:
Arrays.copyOfRange(ligature, 0, 5);
List. You could do:Arrays.asList(ligature).subList( 0,5 ).toArray(); But that is cumbersome..toArray(new String[5])would be needed if one wants to get a typed array backtoArray(new String[0])as the argument is only used to determine the type.Listthen it is used. At least in the case ofArrayList.nullif it is bigger. Thanks!