Java Array Exercises: Convert an ArrayList to an array
Java Array: Exercise-21 with Solution
Write a Java program to convert an ArrayList to an array.
Pictorial Presentation:
Sample Solution:
Java Code :
import java.util.ArrayList;
import java.util.Arrays;
public class Exercise21 {
public static void main(String[] args)
{
ArrayList<String> list = new ArrayList<String>();
list.add("Python");
list.add("Java");
list.add("PHP");
list.add("C#");
list.add("C++");
list.add("Perl");
String[] my_array = new String[list.size()];
list.toArray(my_array);
for (String string : my_array)
{
System.out.println(string);
}
}
}
Sample Output:
Python Java PHP C# C++ Perl
Flowchart:
Visualize Java code execution (Python Tutor):
Java Code Editor:
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Java: Tips of the Day
How to sort an ArrayList?
Collections.sort(testList); Collections.reverse(testList);
That will do what you want. Remember to import Collections though!
Ref: https://bit.ly/32urdSe
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