This question already has answers here:
Java ArrayList to Kotlin Array
(4 answers)
Closed 1 year ago.
So, I try to make a line chart using AAChartModel. I have ArrayList in my code. But in AAchartModel they used an arrayOf instead of ArrayList.
So My Question is, how do I convert from ArrayList to arrayOf ?
arrayOf() returns just an Array. So you can call arrayList.toTypedArray()
Related
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How to use subList()
(6 answers)
Closed 3 years ago.
I want to pass an array as argument to a function without first element.
I came up with this solution, but I'm wondering if there are better ways to it.
List<Integer> numbers = new ArrayList<>();
//... in the meantime numbers is an array that contain 1000 elements;
numbers.remove(0);
myFunction(numbers)
You can use subList(firstElement, lastElement); method.
Here please check javadoc.
This question already has answers here:
How do I declare and initialize an array in Java?
(31 answers)
Closed 5 years ago.
I am trying to declare and instantiate an array named 'canines' that had 25 elements and will hold 'dog' objects...
Is this the best way to do this or is there another formate that would be more correct?
canines[25] = Dog
Dog[] canines = new Dog[25];
Have a look at some of the many online java resources
This question already has answers here:
Is there a longer than int Java List?
(3 answers)
Using a long as ArrayList index in java
(7 answers)
Closed 7 years ago.
I want to have a big ArrayList, so its index would go beyond int, how or what can I use for that?
I already checked that Vector does have the same issue, any ideas?
This question already has answers here:
How can I check if a single character appears in a string?
(16 answers)
Closed 9 years ago.
I have a string like :
"\"[\"a\",\"b\", \"c\"]\""
How to convert this to a list of strings
Could you suggest me a nice way of doing it in Java?
str.contains("c") does this job. However did not you think to consult String class documentation first?
Use contains():
if (str.contains("\"c\""))
This question already has answers here:
Converting a TreeSet to ArrayList?
(3 answers)
Closed 6 years ago.
how can I convert this to a List of the same object type?
TreeSet<FieldBean> Fields = new TreeSet<FieldBean>();
Thanks
One of the constructors of ArrayList takes a collection as an argument and fills the list with the items contained in that collection:
List<FieldBean> list = new ArrayList<FieldBean> (fields);