/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

1 vote173 views2 answers
Get distinct values from list of objects java
Java
0 vote152 views1 answer
How to make a plugin wait on enable
Java
0 vote148 views1 answer
How to reinstall nginuity
Java
2 votes132 views1 answer
Enum set in java
Java
0 vote192 views1 answer
Spring db properties
Java Spring
1 vote142 views2 answers
Change button text by id click java
Java
0 vote151 views1 answer
Install oracle java ubuntu 20.04
Java
3 votes139 views1 answer
Ternary operator java
Java
0 vote166 views1 answer
Json to hashmap java stream
Java
3 votes91 views2 answers
Register listener spigot
Java