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

2 votes629 views2 answers
Spring boot connect to xampp mysql
Java
1 vote354 views1 answer
Add two numbers bitwise
Java
2 votes355 views1 answer
Taking date as input in java
Java
0 vote363 views1 answer
Merced A class
Java
2 votes401 views1 answer
Charcodeat java
Java
0 vote297 views1 answer
One space diagonally in java
Java
1 vote414 views2 answers
Localdate to string java
Java
0 vote349 views1 answer
Exception in thread "main" java.lang.NoClassDefFoundError sdkmanager
Java
6 votes387 views2 answers
Java print variable type
Java
1 vote351 views3 answers
Java take and save screenshot
Java