Java Bootcamp – Workbooks and Challenges
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Workbook 6.14

From the Java Bootcamp Resources, launch Workbook 6.14.

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Task 1

This function returns a random number between 0 and 99. Copy it into your class.

public static int randomNumber() { double randomNumber = Math.random()*100; return (int)randomNumber; }

Task 2

Write a function that prints the contents of an int[][] array.

/** * Function name: print2DArray * @param array ( int[][] ) * * * * * * */

The function uses a nested loop. The inner loop prints each row in one line.

/** * Function name: print2DArray * @param array ( int[][] ) * * Inside the function: * 1. Nested loop: * - Inner Loop: System.out.print(array[i][j] + " "); * */

After the inner loop runs to completion, print a new line.

/** * Function name: print2DArray * @param array ( int[][] ) * * Inside the function: * 1. Nested loop: * - Inner Loop: System.out.print(array[i][j] + " "); * - After the Inner Loop Completes: System.out.print("\n"); */

Call print2DArray for the following array.

int[][] array = { {48, 56, 56, 76, 0, 81, 51, 81, 99, 70}, {38, 52, 73, 6, 10, 56, 1, 71, 47, 9}, {85, 35, 47, 98, 91, 25, 69, 52, 2, 93} };

Result

Delete the array if you achieve the result.

Task 3

Create a 2D array with 100 rows and 10 columns. Then call print2DArray.

Task 4

Use a nested loop to populate the array with random numbers before calling: print2DArray.

Visualizing the Runtime

After you solve this workbook, I still recommend watching the video solution on Udemy.

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It will show you how to visualize the runtime using Visual Studio Code.


Associated Course: The Complete Java Development Bootcamp
Related Course: The Complete Spring Boot Development Bootcamp – Become a Java Web Developer

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