Heart Pattern in Java

Heart Pattern is another complex pattern program that is rarely asked by the interviewers because of its complexity.

We print two types of heart patterns, i.e., a simple heart and some text inside the heart. We take the help of the Math class and the lineSeparator() method of the System. Let's implement the code of both types of hearts. and understand the use of Math class and lineSeparator().

HeartPatternExample1.java

// create class HeartPatternExample1 that will print Heart pattern
public class HeartPatternExample1
{
    	// main() method start
    	public static void main(String[] args)
    	{
        		// declare and initialize variable for output size
        		final int size = 4	;
        
        		// nested for loop to print the upper part of Heart
       	 	for (int m = 0; m < size; m++) {
             		for (int n = 0; n <= 4 * size; n++) {
                			double pos1 = Math.sqrt(Math.pow(m - size, 2) + Math.pow(n - size, 2));
                			double pos2 = Math.sqrt(Math.pow(m - size, 2) + Math.pow(n - 3 * size, 2));
 
                			if (pos1 < size + 0.5 || pos2 < size + 0.5) {
                    				System.out.print('*');
                			} else {
                     				System.out.print(' ');
                			}
            			}
            	 		System.out.print(System.lineSeparator());
         		}
           		// for loop to print the lower part of Heart
         		for (int m = 1; m <= 2 * size; m++)
        		{
             		for (int n = 0; n < m; n++) {
                 		System.out.print(' ');
             	}
             	for (int n = 0; n < 4 * size + 1 - 2 * m; n++) {
                		System.out.print("*");
            		}
             	System.out.print(System.lineSeparator());
         	}
    }
}

Output:

HeartPatternExample2.java

// import required classes
package javaTpoint.JavaExample;

// create class HeartPatternExample1 that will print Heart pattern
public class HeartPatternExample2
{
    // main() method start
    public static void main(String[] args)
    {
        // declare and initialize variable for output size
        final int size = 8;
        final String msg = " I love You ";
        
        // nested for loop to print the upper part of Heart
        for (int m = 0; m < size; m++) {
            for (int n = 0; n <= 4 * size; n++) {
                double pos1 = Math.sqrt(Math.pow(m - size, 2) + Math.pow(n - size, 2));
                double pos2 = Math.sqrt(Math.pow(m - size, 2) + Math.pow(n - 3 * size, 2));
 
                if (pos1 < size + 0.5 || pos2 < size + 0.5) {
                    System.out.print('*');
                } else {
                    System.out.print(' ');
                }
            }
            System.out.print(System.lineSeparator());
        }
        
        // for loop to print the lower part of Heart
        for (int m = 1; m <= 2 * size; m++) {
            for (int n = 0; n < m; n++) {
                System.out.print(' ');
            }
 
            for (int n = 0; n < 4 * size + 1 - 2 * m; n++) {
                if (m >= 2 && m <= 4) {
                    int position = n - (4 * size - 2 * m - msg.length()) / 2;
                    if (position < msg.length() && position >= 0) {
                        if (m == 3) {
                            System.out.print(msg.charAt(position));
                        } else {
                            System.out.print(' ');
                        }
                    }
                    else {
                        System.out.print('*');
                    }
                }
                else {
                    System.out.print('*');
                }
            }
            System.out.print(System.lineSeparator());
        }
    }
}

Output: