Java: Trim the capacity of an array list the current list size
Write a Java program for trimming the capacity of an array list.
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:

For more Practice: Solve these Related Problems:
- Write a Java program to trim the capacity of an ArrayList using trimToSize() and then print the internal array size if accessible.
- Write a Java program to create an ArrayList with a large capacity, add elements, and then trim it to the current size.
- Write a Java program to compare the performance before and after calling trimToSize() on an ArrayList.
- Write a Java program to simulate dynamic array behavior by manually adjusting the capacity of an ArrayList.
Java Code Editor:
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