Java ArrayList Exercises, Practice & Solutions

Last update on December 21 2024 09:35:49 (UTC/GMT +8 hours)

Java Collection: ArrayList Exercises [22 exercises with solution]

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ArrayList:

In Java, an ArrayList is a resizable array implementation of the List interface provided by the Java Collections Framework. It's part of the java.util package. Unlike arrays, which have a fixed size, ArrayList can dynamically grow and shrink in size as elements are added or removed. This makes it a more flexible data structure for handling collections of objects.

1. Write a Java program to create an array list, add some colors (strings) and print out the collection.
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2. Write a Java program to iterate through all elements in an array list.
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3. Write a Java program to insert an element into the array list at the first position.
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4. Write a Java program to retrieve an element (at a specified index) from a given array list.
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5. Write a Java program to update an array element by the given element.
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6. Write a Java program to remove the third element from an array list.
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7. Write a Java program to search for an element in an array list.
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8. Write a Java program to sort a given array list.
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9. Write a Java program to copy one array list into another.
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10. Write a Java program to shuffle elements in an array list.
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11. Write a Java program to reverse elements in an array list.
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12. Write a Java program to extract a portion of an array list.
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13. Write a Java program to compare two array lists.
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14. Write a Java program that swaps two elements in an array list.
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15. Write a Java program to join two array lists.
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16. Write a Java program to clone an array list to another array list.
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17. Write a Java program to empty an array list.
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18. Write a Java program to test whether an array list is empty or not.
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19. Write a Java program for trimming the capacity of an array list.
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20. Write a Java program to increase an array list size.
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21. Write a Java program to replace the second element of an ArrayList with the specified element.
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22. Write a Java program to print all the elements of an ArrayList using the elements' position.
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