Java Collection, ArrayList Exercises: Trim the capacity of an array list the current list size
Java Collection, ArrayList Exercises: Exercise-19 with Solution
Write a Java program to trim the capacity of an array list the current list size.
Pictorial Presentation:
Sample Solution:-
Java Code:
import java.util.ArrayList;
import java.util.Collections;
public class Exercise19 {
public static void main(String[] args) {
ArrayList<String> c1= new ArrayList<String>();
c1.add("Red");
c1.add("Green");
c1.add("Black");
c1.add("White");
c1.add("Pink");
System.out.println("Original array list: " + c1);
System.out.println("Let trim to size the above array: ");
c1.trimToSize();
System.out.println(c1);
}
}
Sample Output:
Original array list: [Red, Green, Black, White, Pink] Let trim to size the above array: [Red, Green, Black, White, Pink]
Flowchart:
Java Code Editor:
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Previous: Test an array list is empty or not.
Next: Increase the size of an array list.
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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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