Java Star Pattern 7

Posted in Java Tutorial

Updated on Jan 10, 2024

By Mari Selvan

👁️ 250 - Views

⏳ 4 mins

💬 1 Comment

Photo Credit to CodeToFun

Java Star Pattern 7

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;
  for(i=1; i<=5; i++)
  {
   for(j=5; j>=1; j--)
   {
    if(i == j)
     System.out.print("*");
    else
     System.out.print(" ");
   }
   for(k=2; k<=5; k++)
   {
    if(i == k)
     System.out.print("*");
    else
     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 defines a class named "Demo."
public static void main(String[] args): This is the main method of the program. It's the entry point for execution when you run the program. It takes an array of strings as command-line arguments (though in this program, it doesn't use them).
Inside the main method, you'll find the following variables declared:
- int i, j, k;: These are integer variables that will be used as counters in loops.
The program uses nested loops to generate the desired pattern. Let's analyze the loops step by step:
1. Outer Loop (for(i=1; i<=5; i++)): This loop runs five times, from i=1 to i=5. It controls the number of rows in the pattern.
2. First Inner Loop (for(j=5; j>=1; j--)): This loop runs from j=5 to j=1 and is responsible for printing spaces or asterisks in the first half of each row.
  - Inside this loop, there's an if condition: if(i == j). It checks whether the current value of i is equal to the current value of j. If they are equal, it prints an asterisk (*); otherwise, it prints a space.
3. Second Inner Loop (for(k=2; k<=5; k++)): This loop runs from k=2 to k=5 and is responsible for printing spaces or asterisks in the second half of each row.
  - Inside this loop, there's an if condition: if(i == k). It checks whether the current value of i is equal to the current value of k. If they are equal, it prints an asterisk (*); otherwise, it prints a space.
4. After printing the first half (spaces and asterisks) of each row, the program prints a newline character using System.out.println(); to move to the next row.
The program repeats this process for each row, creating a right-angled triangle pattern where asterisks form a diagonal line from the top-left to the bottom-right corner, with spaces filling the remaining positions.
When the outer loop (for(i=1; i<=5; i++)) completes its iterations, the program finishes execution.

💯 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!