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Java Exercises: Print the contents of a two-dimensional Boolean array in specific format

Java Basic: Exercise-154 with Solution

Write a Java program to print the contents of a two-dimensional Boolean array where t will represent true and f will represent false.

Sample array:
array = {{true, false, true},
{false, true, false}};

Pictorial Presentation:

Java Basic Exercises: Print the contents of a two-dimensional Boolean array in specific format.

Sample Solution:

Java Code:

import java.util.Scanner;
public class Solution {
	public static void main(String[] args) {
		boolean[][] array = {{true, false, true},
							 {false, true, false}};
		int rows_length = array.length;
		int columns_length = array[0].length;
		
		for (int i = 0; i < rows_length; i++) {
			for (int j = 0; j < columns_length; j++) {
				
				if (array[i][j]) {
					System.out.print(" t ");
				} else {
					System.out.print(" f ");
				}
				
			}
			System.out.println();
		}	
    }
}

Sample Output:

 t  f  t 
 f  t  f 

Flowchart:

Flowchart: Java exercises: Print the contents of a two-dimensional Boolean array in specific format.

Java Code Editor:

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Previous: Write a Java program that accepts two double variables and test if both strictly between 0 and 1 and false otherwise.
Next: Write a Java program to print an array after changing the rows and columns of a given two-dimensional array.

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Java: Tips of the Day

Array vs ArrayLists:

The main difference between these two is that an Array is of fixed size so once you have created an Array you cannot change it but the ArrayList is not of fixed size. You can create instances of ArrayLists without specifying its size. So if you create such instances of an ArrayList without specifying its size Java will create an instance of an ArrayList of default size.

Once an ArrayList is full it re-sizes itself. In fact, an ArrayList is internally supported by an array. So when an ArrayList is resized it will slow down its performance a bit as the contents of the old Array must be copied to a new Array.

At the same time, it's compulsory to specify the size of an Array directly or indirectly while creating it. And also Arrays can store both primitives and objects while ArrayLists only can store objects.

Ref: https://bit.ly/3o8L2KH