To implement Java program using Array.

Explanation

This Java program demonstrates how to create and manipulate a One-Dimensional (1D) Array where the size and the elements are determined by the user at runtime.

The logic follows a linear progression:

1. Input Setup: The program uses the Scanner class to read input from the keyboard.
2. Defining Size: It first asks the user how many elements they want to store. This value is used to dynamically allocate memory for the array using the new keyword.
3. Data Collection: A for loop runs from index 0 to size - 1. In each iteration, the program prompts the user for a number and stores it in the corresponding index of the array (num[i]).
4. Displaying Data: A second for loop traverses the array from the beginning to the end (using num.length) to print each stored value to the console, formatted inside square brackets.
5. Resource Management: Finally, it closes the Scanner object to prevent memory leaks.

Algorithm

1. Start.
2. Import the java.util.Scanner package to enable user input.
3. Declare a class named array_1d_userdef.
4. Initialize a Scanner object named input.
5. Prompt the user to enter the size of the array and store it in an integer variable size.
6. Instantiate an integer array num with the specified size: int[] num = new int[size].
7. Input Loop:
   • Start a loop from i = 0 to size - 1.
   • Read an integer from the user and assign it to num[i].
8. Output Loop:
   • Print a prefix string "User Defined 1D Array: [".
   • Start a loop from i = 0 to num.length - 1.
   • Print the value at num[i] followed by a comma.
9. Close the bracket and close the Scanner object.
10. End.