Java Star Pattern 11

Posted in Java Tutorial

Updated on Jan 10, 2024

By Mari Selvan

👁️ 551 - Views

⏳ 4 mins

💬 1 Comment

Photo Credit to CodeToFun

Java Star Pattern 11

Here`s a program that prints the above star pattern using Java Programming:

Demo.java

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public class Demo
{
 public static void main(String[] args)
 {
  int i, j, k;
  // First Part
  for(i=1; i<=5; i++)
  {
   for(j=i; j<=5; j++)
    System.out.print("*");
   for(k=1; k<(i*2)-1; k++)
    System.out.print(" ");
   for(j=i; j<=5; j++)
    System.out.print("*");
   for(k=1; k<i*2; k++)
    System.out.print(" ");
   System.out.println();
  }
  // Second Part
  for(i=4; i>=1; i--)
  {
   for(j=5; j>=i; j--)
    System.out.print("*");
   for(k=1; k<(i*2)-1; k++)
    System.out.print(" ");
   for(j=5; j>=i; j--)
    System.out.print("*");
   for(k=1; k<i*2; k++)
    System.out.print(" ");
   System.out.println();
  }
 }
}

💻 Testing the Program

When you run the above program, it will print the following output:

Output

**********
****  ****
***    ***
**      **
*        *
**      **
***    ***
****  ****
**********

🧠 How the Program Works

Let's break down the logic behind the code:

public class Demo: This line declares a public class named Demo.
public static void main(String[] args): This line is the main method declaration. It is the entry point of the program.
Inside the main method, the program declares three integer variables i, j, and k without initializing them.
First Part (Creating the Upward Triangle):
- The first part of the program consists of two nested loops. The outer loop (for(i=1; i<=5; i++)) iterates from 1 to 5.
- The first inner loop (for(j=i; j<=5; j++)) prints stars (*) from i to 5, creating a row of stars.
- The second inner loop (for(k=1; k<(i*2)-1; k++)) prints spaces in between the stars based on the current value of i.
- The program then repeats the process of printing stars and spaces for the second half of the row.
- After completing a row, a new line is printed (System.out.println();), moving to the next row.
The output of the first part will be an upward-pointing triangle with stars and spaces.
Second Part (Creating the Downward Triangle):
- After completing the first part, the program enters the second part, which also consists of two nested loops.
- The outer loop (for(i=4; i>=1; i--)) iterates from 4 down to 1.
- The inner loops are similar to those in the first part but print stars and spaces in reverse order, creating a downward-pointing triangle.
- Again, after completing a row, a new line is printed.

💯 Tips for Enhancement:

Explore the versatility of this pattern by adjusting its parameters. Whether you increase or decrease the size, tweak the spacing, or modify the characters used, each change opens up a world of possibilities, allowing you to customize and create your unique visual effects.

✔ Conclusion:

Creating visually appealing patterns is not only a fun endeavour but also a great way to enhance your programming or design skills. We hope this tutorial has inspired you to explore the world of creative coding. Share your creations with us, and let your imagination run wild!

🤗 Closing Call-to-Action:

We'd love to see your unique interpretations of the star pattern. Share your creations in the comments below, and don't hesitate to reach out if you have any questions or suggestions for future tutorials. Happy coding!