/Java/Convert arraylist to array in java

Convert arraylist to array in java

Java arraylist to array

List<String> list = new ArrayList<>();
list.add("a");
list.add("ab");
list.add("abc");
list.add("abcd");
// convert
String[] array = list.toArray();

Convert arraylist to array in java

Integer[] arr = new Integer[al.size()]; 
  
        // ArrayList to Array Conversion 
        for (int i = 0; i < al.size(); i++) 
            arr[i] = al.get(i);

Arraylist to array java

ArrayList<String> ArrayLister=new ArrayList<>(){ArrayLister.add("Hi")};
String[] array=ArrayLister.toArray(String[]);

Array to arraylist java

ArrayList<Integer> list = new ArrayList<>(OtherList);
//it will copy all elements from OtherList to this one
//time complexity - O(n)

Similar codes

0 vote300 views1 answer
Where to check when you hava a error
Java
24 votes310 views6 answers
String to char in java
Java
0 vote324 views1 answer
Potenzieren java
Java
1 vote321 views1 answer
Java sort arraylist of arraylist
Java
0 vote335 views1 answer
Ecludis
Java
-2 votes330 views1 answer
Android httpurlconnection
Java
0 vote337 views1 answer
Java show error dialog
Java
0 vote324 views1 answer
Javafx application fxml
Java
0 vote360 views1 answer
Cannot find symbol final TextView textView = root.findViewById(R.id.text_home);
Java
0 vote404 views1 answer
Get logged-in user in Spring Security
Java Spring