Arraylist to array 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);

Java list to array

List<Foo> list = new ArrayList<>();
Foo[] array = list.toArray(new Foo[0]);

Source: stackoverflow.com

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)

Arraylist to java

You can only use the to array method if you convert to any object type.

Similar codes

0 vote276 views1 answer
Error: Could not find or load main class mcp.client.Start Caused by: java.lang.ClassNotFoundException: mcp.client.Start
Java
1 vote316 views1 answer
Java joptionpane
Java
4 votes251 views1 answer
Printf %2d in java
Java
0 vote272 views1 answer
Set text from strings.xml
Java
2 votes291 views10 answers
Javascript
Java
7 votes232 views1 answer
Equals method in java
Java
0 vote278 views1 answer
Multi dimensional array declaration in java
Java
3 votes267 views2 answers
Boolean print condition java
Java
-1 vote269 views1 answer
Get my jre path
Java
0 vote272 views1 answer
How to install java on ubuntu 18.0.4
Java