Java Collection, ArrayList Exercises: Increase the size of an array list
Java Collection, ArrayList Exercises: Exercise-20 with Solution
Write a Java program to increase the size of an array list.
Pictorial Presentation:

Sample Solution:-
Java Code:
import java.util.ArrayList;
import java.util.Collections;
public class Exercise20 {
public static void main(String[] args) {
ArrayList<String> c1= new ArrayList<String>(3);
c1.add("Red");
c1.add("Green");
c1.add("Black");
System.out.println("Original array list: " + c1);
//Increase capacity to 6
c1.ensureCapacity(6);
c1.add("White");
c1.add("Pink");
c1.add("Yellow");
System.out.println("New array list: " + c1);
}
}
Sample Output:
Original array list: [Red, Green, Black] New array list: [Red, Green, Black, White, Pink, Yellow]
Flowchart:

Java Code Editor:
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Previous: Trim the capacity of an array list the current list size.
Next: Replace the second element of a ArrayList with the specified element.
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Java: Tips of the Day
countOccurrences
Counts the occurrences of a value in an array.
Use Arrays.stream().filter().count() to count total number of values that equals the specified value.
public static long countOccurrences(int[] numbers, int value) { return Arrays.stream(numbers) .filter(number -> number == value) .count(); }
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