12 Pattern Programs in Java That Separate Beginner Coders from the Pros!

Pattern programs in Java are algorithms that generate specific shapes or designs using characters or numbers in a structured manner. These programs typically involve nested loops to print patterns like triangles, squares, pyramids, or diamonds. 

They are often used to enhance problem-solving and coding skills by teaching the importance of loops, logic, and design thinking. For example, they can be used for designing a seating arrangement in a theater, where each row or seat is represented in a specific pattern to optimize space.

In this blog, you'll explore the concept of pattern programs in Java, learn how to implement them using looping statements, and see real-world examples of their applications.

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What Are Pattern Programs in Java? 12 Examples You Need to Know in 2025

Before we delve into the various pattern programs in Java, let’s take a look at what exactly pattern printing in Java refers to. To put it simply, pattern printing programs are patterns or symbols that contain alphabets, or characters in a particular form. These programs mainly aim to improve logic, coding skills, and looping concepts. A Java pattern program specifically can be printed in various designs.

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Here’s a table with a brief overview of the 12 pattern programs in Java:

You can get a better hang of pattern programs in Java with upGrad’s free Core Java Basics course. It covers variables, data types, loops, and OOP principles to build strong coding skills. Perfect for aspiring developers, students, and professionals transitioning to Java.

Also Read: Java Language History: Key Milestones and Development

Next, we’ll explore each of these pattern programs in Java in detail with code examples.

1. Simple Triangle Pattern

This basic pattern creates a simple triangular shape using stars or numbers. It’s ideal for beginners to practice loops and basic control flow.

Here are some of its key features:

• Easy to implement with nested loops.
• Builds foundational programming skills.
• Good for learning pattern structure.

Pattern: 

1

1 2

1 2 3

1 2 3 4

1 2 3 4 5

1 2 3 4 5 6

1 2 3 4 5 6 7

Code:

import java.util.Scanner;

public class MainClass

{

    public static void main(String[] args) 

    {

        Scanner sc = new Scanner(System.in);        

        //Taking rows value from the user   

        System.out.println(“How many rows you want in this pattern?”);         

        int rows = sc.nextInt();         

        System.out.println(“Here is your pattern….!!!”);         

        for (int i = 1; i <= rows; i++) 

        {

            for (int j = 1; j <= i; j++)

            {

                System.out.print(j+” “);

            }             

            System.out.println();

        }         

        //Close the resources         

        sc.close();

    }

}

Explanation: This Java program generates a simple triangle pattern where each row contains numbers starting from 1 up to the current row number. The number of rows is determined by user input. The program uses nested loops, where the outer loop handles the rows, and the inner loop prints the numbers in each row.

Code Output: If the user inputs 5 for the number of rows, the output will be:

How many rows you want in this pattern?
5
Here is your pattern....!!!
1 
1 2 
1 2 3 
1 2 3 4 
1 2 3 4 5

2. Double Triangle Pattern

This pattern combines two triangles facing each other, either using numbers or characters. It helps to visualize symmetry in programming.

Here are some of its key features:

• Involves nested loops for both halves.
• Can be customized to create mirrored designs.
• Enhances understanding of symmetry.

Pattern:

1

1 2

1 2 3

1 2 3 4

1 2 3 4 5

1 2 3 4 5 6 7

1 2 3 4 5 6

1 2 3 4 5

1 2 3 4

1 2 3

1 2

1

Code:

import java.util.Scanner; 

public class MainClass

{

    public static void main(String[] args) 

    {

        Scanner sc = new Scanner(System.in);         

        //Taking rows value from the user        

        System.out.println(“How many rows you want in this pattern?”);        

        int rows = sc.nextInt();         

        System.out.println(“Here is your pattern….!!!”);        

        //Printing upper half of the pattern         

        for (int i = 1; i <= rows; i++) 

        {

            for (int j = 1; j <= i; j++) 

            { 

                System.out.print(j+” “); 

            }              

            System.out.println(); 

        }          

        //Printing lower half of the pattern          

        for (int i = rows-1; i >= 1; i–)

        {

            for (int j = 1; j <= i; j++)

            {

                System.out.print(j+” “);

            }            

            System.out.println();

        }        

        //Closing the resources         

        sc.close();

    }

}

Explanation: This Java program generates a diamond-shaped number pattern. The user is prompted to input the number of rows for the top half of the pattern. The program then prints the upper half of the pattern by incrementing numbers, followed by the lower half, which is the reverse of the upper half. The program uses two separate loops: one for the upper half and one for the lower half.

Code Output: If the user inputs 5 for the number of rows, the output will be:

How many rows you want in this pattern?
5
Here is your pattern....!!!
1 
1 2 
1 2 3 
1 2 3 4 
1 2 3 4 5 
1 2 3 4 
1 2 3 
1 2 
1

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3. Triangle Pattern with Repeated Digits

This program generates a triangle pattern using the same digit repeatedly in each row. It’s used to practice loops and output formatting.

Here are some of its key features:

• Focuses on generating consistent outputs.
• Repetitive digit usage for clarity.
• A common exercise for beginners.

Pattern:

1

2 2

3 3 3

4 4 4 4

5 5 5 5 5

6 6 6 6 6 6

7 7 7 7 7 7 7 

Code:

import java.util.Scanner;

public class MainClass

{

    public static void main(String[] args) 

    {

        Scanner sc = new Scanner(System.in);       

        //Taking rows value from the user         

        System.out.println(“How many rows you want in this pattern?”);         

        int rows = sc.nextInt();         

        System.out.println(“Here is your pattern….!!!”);        

        for (int i = 1; i <= rows; i++) 

        {

            for (int j = 1; j <= i; j++)

            {

                System.out.print(i+” “);

            }             

            System.out.println();

        }         

        //Close the resources         

        sc.close();

    }

}

Explanation: This Java program generates a pattern where each row contains the same number, which is equal to the row number itself. The user is prompted to input the number of rows, and the program uses nested loops to print the pattern. The outer loop handles the rows, and the inner loop prints the same number (the row number) for each column in that row.

Code Output: If the user inputs 5 for the number of rows, the output will be:

How many rows you want in this pattern?
5
Here is your pattern....!!!
1 
2 2 
3 3 3 
4 4 4 4 
5 5 5 5 5

4. Inverted Triangle with Descending Digits

This pattern creates an inverted triangle where numbers decrease with each row. It’s typically used in number theory exercises.

Here are some of its key features:

• Teaches control of loop variables.
• Good practice for printing decreasing values.
• Reinforces nested loop usage.

Pattern:

7 6 5 4 3 2 1

7 6 5 4 3 2 

7 6 5 4 3 

7 6 5 4

7 6 5

7 6

7

Code:

import java.util.Scanner;

public class MainClass

{

    public static void main(String[] args) 

    {

        Scanner sc = new Scanner(System.in);         

        //Taking rows value from the user         

        System.out.println(“How many rows you want in this pattern?”);        

        int rows = sc.nextInt();         

        System.out.println(“Here is your pattern….!!!”);         

        for (int i = 1; i <= rows; i++) 

        { 

            for (int j = rows; j >= i; j–)

            {

                System.out.print(j+” “);

            }             

            System.out.println();

        }         

        //Closing the resources         

        sc.close();

    }

}

Explanation: This Java program generates a pattern where each row contains numbers that start from the total number of rows and decrease with each iteration. The user is prompted to input the number of rows, and the program uses nested loops to print the numbers in a descending order for each row. The outer loop controls the rows, while the inner loop handles the printing of numbers in decreasing order.

Code Output: If the user inputs 5 for the number of rows, the output will be:

How many rows you want in this pattern?
5
Here is your pattern....!!!
5 4 3 2 1 
5 4 3 2 
5 4 3 
5 4 
5 

Also Read: Top 10 Free Java Courses with Certificates for In-Demand Java Jobs

5. Triangle with Repeating Pattern

This pattern creates a triangle with a repeating design in each row, often using numbers or symbols. It’s useful for design pattern exercises.

Here are some of its key features:

• Focuses on repeating patterns for complex designs.
• Utilizes nested loops.
• Great for practice with alternating sequences.

Pattern:

1

1 2 1

1 2 3 2 1

1 2 3 4 3 2 1

1 2 3 4 5 4 3 2 1

1 2 3 4 5 6 5 4 3 2 1

1 2 3 4 5 6 7 6 5 4 3 2 1

Code:

import java.util.Scanner;

public class MainClass

{

    public static void main(String[] args) 

    {

        Scanner sc = new Scanner(System.in);         

        //Taking rows value from the user         

        System.out.println(“How many rows you want in this pattern?”);         

        int rows = sc.nextInt();         

        System.out.println(“Here is your pattern….!!!”);        

        for (int i = 1; i <= rows; i++) 

        {

            //Printing first half of the row            

            for (int j = 1; j <= i; j++) 

            { 

                System.out.print(j+” “); 

            }             

            //Printing second half of the row              

            for (int j = i-1; j >= 1; j–)

            {

                System.out.print(j+” “);

            }             

            System.out.println();

        }         

        //Closing the resources        

        sc.close();

    }

}

Explanation: This Java program generates a pattern where each row first increases from 1 to the current row number and then decreases back to 1. The user is prompted to input the number of rows, and the program uses two nested loops: the first loop prints the ascending numbers, and the second loop prints the descending numbers for each row. The outer loop controls the rows, while the inner loops handle the printing of the numbers in ascending and descending order.

Code Output: If the user inputs 5 for the number of rows, the output will be:

How many rows you want in this pattern?
5
Here is your pattern....!!!
1 
1 2 1 
1 2 3 2 1 
1 2 3 4 3 2 1 
1 2 3 4 5 4 3 2 1

6. Double Triangle Pattern

This pattern combines two symmetrical triangles, either aligned or staggered. It’s used in algorithm challenges and design tasks.

Here are some of its key features:

• Shows how to work with symmetry and alignment.
• Demonstrates the complexity of combining patterns.
• Useful in visual design tasks.

Pattern:

1 2 3 4 5 6 7

1 2 3 4 5 6

1 2 3 4 5

1 2 3 4

1 2 3

1 2 

1 

1 2

1 2 3 

1 2 3 4 

1 2 3 4 5

1 2 3 4 5 6

1 2 3 4 5 6 7

Code:

import java.util.Scanner; 

public class MainClass

{

    public static void main(String[] args) 

    {

        Scanner sc = new Scanner(System.in);         

        //Taking rows value from the user         

        System.out.println(“How many rows you want in this pattern?”);         

        int rows = sc.nextInt();        

        System.out.println(“Here is your pattern….!!!”);         

        //Printing upper half of the pattern         

        for (int i = rows; i >= 1; i–) 

        {

            for (int j = 1; j <= i; j++)

            {

                System.out.print(j+” “);

            }             

            System.out.println();

        }         

        //Printing lower half of the pattern         

        for (int i = 2; i <= rows; i++) 

        {

            for (int j = 1; j <= i; j++)

            {

                System.out.print(j+” “);

            }             

            System.out.println();

        }         

        //Closing the resources        

        sc.close();

    }

}

Explanation: This Java program generates a symmetrical pattern where each row starts by printing numbers in ascending order from 1 to the current row number and then prints the same numbers in descending order back to 1. The number of rows is determined by user input. The program uses two nested loops: the first loop prints the ascending numbers, and the second loop prints the descending numbers for each row. The outer loop controls the rows, while the inner loops handle the number printing.

Code Output: If the user inputs 5 for the number of rows, the output will be:

How many rows you want in this pattern?
5
Here is your pattern....!!!
1 
1 2 1 
1 2 3 2 1 
1 2 3 4 3 2 1 
1 2 3 4 5 4 3 2 1

Also Read: Top Java Courses for 2025 – Developer Approved Picks

7. Inverted Double Triangles

This pattern mirrors the double triangle pattern, but inverted. It's often used to challenge problem-solving skills and logic.

Here are some of its key features:

• Focuses on creating inverse patterns.
• Requires advanced nested loops.
• Excellent for practicing control flow.

Pattern:

1234567

  234567

    34567

      4567

        567

          67

            7

          67

        567

      4567

    34567

  234567

1234567

Code:

import java.util.Scanner;

public class MainClass

{

    public static void main(String[] args) 

    {

        Scanner sc = new Scanner(System.in);        

        //Taking rows value from the user        

        System.out.println(“How many rows you want in this pattern?”);       

        int rows = sc.nextInt();      

        System.out.println(“Here is your pattern….!!!”);        

        //Printing upper half of the pattern         

        for (int i = 1; i <= rows; i++) 

        {

            //Printing i spaces at the beginning of each row             

            for (int j = 1; j < i; j++) 

            {

                System.out.print(” “);

            }             

            //Printing i to rows value at the end of each row             

            for (int j = i; j <= rows; j++) 

            { 

                System.out.print(j); 

            }              

            System.out.println(); 

        }          

        //Printing lower half of the pattern          

        for (int i = rows-1; i >= 1; i–) 

        {

            //Printing i spaces at the beginning of each row             

            for (int j = 1; j < i; j++) 

            {

                System.out.print(” “);

            }            

            //Printing i to rows value at the end of each row            

            for (int j = i; j <= rows; j++)

            {

                System.out.print(j);

            }             

            System.out.println();

        }        

        //Closing the resources         

        sc.close();

    }

}

Explanation: This Java program generates a diamond-like pattern using numbers. The user is prompted to input the number of rows for the upper half of the diamond. The program uses nested loops to first print spaces and then print numbers, starting from the row index to the total number of rows. After printing the upper half, the program prints the lower half of the pattern, which mirrors the upper half. The pattern is symmetric and involves controlling spaces and numbers within each row.

Code Output: If the user inputs 5 for the number of rows, the output will be:

How many rows you want in this pattern?
5
Here is your pattern....!!!
12345
12345
 12345
  12345
   12345
  12345
 12345
12345
12345

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8. Double Inverted Triangles

This pattern displays two inverted triangles side by side, often used to create complex visual shapes.

Here are some of its key features:

• Enhances creativity in design patterns.
• Helps to visualize how patterns can be manipulated.
• Reinforces understanding of loop interaction.

Pattern:

1 2 3 4 5 6 7 

  2 3 4 5 6 7

    3 4 5 6 7

      4 5 6 7

        5 6 7

          6 7

            7

          6 7

        5 6 7

      4 5 6 7

    3 4 5 6 7

  2 3 4 5 6 7

1 2 3 4 5 6 7

Code:

import java.util.Scanner; 

public class MainClass

{

    public static void main(String[] args) 

    {

        Scanner sc = new Scanner(System.in);        

        //Taking rows value from the user     

        System.out.println(“How many rows you want in this pattern?”);         

        int rows = sc.nextInt();         

        System.out.println(“Here is your pattern….!!!”);         

        //Printing upper half of the pattern         

        for (int i = 1; i <= rows; i++) 

        {

            //Printing i spaces at the beginning of each row             

            for (int j = 1; j < i; j++) 

            {

                System.out.print(” “);

            }             

            //Printing i to rows value at the end of each row             

            for (int j = i; j <= rows; j++) 

            { 

                System.out.print(j+” “); 

            }            

            System.out.println(); 

        }          

        //Printing lower half of the pattern          

        for (int i = rows-1; i >= 1; i–) 

        {

            //Printing i spaces at the beginning of each row             

            for (int j = 1; j < i; j++) 

            {

                System.out.print(” “);

            }             

            //Printing i to rows value at the end of each row             

            for (int j = i; j <= rows; j++)

            {

                System.out.print(j+” “);

            }            

            System.out.println();

        }         

        //Closing the resources        

        sc.close();

    }

}

Explanation: This Java program generates a diamond-shaped number pattern with spaces. The user is prompted to input the number of rows for the top half of the pattern. The program uses nested loops to print spaces at the beginning of each row, followed by numbers that increment from the current row number to the total number of rows. After printing the upper half, it mirrors the upper half to print the lower half of the diamond. The pattern creates a symmetric, visually appealing design.

Code Output: If the user inputs 5 for the number of rows, the output will be:

How many rows you want in this pattern?
5
Here is your pattern....!!!
1 2 3 4 5 
2 3 4 5 
 3 4 5 
  4 5 
   5 
  4 5 
 3 4 5 
2 3 4 5 
1 2 3 4 5

Also Read: 50 Java Projects With Source Code in 2025: From Beginner to Advanced

9. Digit Pillar Pattern

The digit pillar pattern is a column of digits, often increasing or decreasing in value. It is commonly used in teaching loops and iteration.

Here are some of its key features:

• Focuses on column-based iteration.
• Simple, repetitive output for practicing loops.
• Useful in learning how to manage vertical alignment.

Pattern:

1111111

1111122

1111333

1114444

1155555

1666666

7777777 

Code:

import java.util.Scanner; 

public class MainClass

{

    public static void main(String[] args) 

    {

        Scanner sc = new Scanner(System.in);         

        System.out.println(“How many rows you want in this pattern?”);         

        int rows = sc.nextInt();         

        System.out.println(“Here is your pattern….!!!”);         

        for (int i = 1; i <= rows; i++) 

        {

            for (int j = 1; j <= rows-i; j++)

            {

                System.out.print(1);

            }             

            for (int j = 1; j <= i; j++)

            {

                System.out.print(i);

            }             

            System.out.println();

        }         

        sc.close();

    }

}

Explanation: This Java program generates a pattern where the first half consists of 1's printed for the first part of the row, followed by the row number (i) printed for the second part of the row. The user inputs the number of rows, and the program uses nested loops to print the pattern. The outer loop controls the rows, the first inner loop prints 1 for the required number of spaces, and the second inner loop prints the row number starting from 1 up to the total number of rows.

Code Output: If the user inputs 5 for the number of rows, the output will be:

How many rows you want in this pattern?
5
Here is your pattern....!!!
11111
11112
11123
11234
12345

Also Read: Is Java Easy to Learn? Key Factors to Consider

10. Binary Digit Pattern

This pattern generates a sequence of binary digits (0 and 1), often used to teach binary operations and logic.

Here are some of its key features:

• Great for learning binary number systems.
• Often used in algorithm and data structure exercises.
• Helps to practice conditional logic.

Pattern:

1010101

0101010

1010101

0101010

1010101

0101010

1010101

Code:

import java.util.Scanner;

public class MainClass

{

    public static void main(String[] args) 

    {

        Scanner sc = new Scanner(System.in);        

        System.out.println(“How many rows you want in this pattern?”);         

        int rows = sc.nextInt();        

        System.out.println(“Here is your pattern….!!!”);        

        for (int i = 1; i <= rows; i++) 

        {

            int num;            

            if(i%2 == 0)

            {

                num = 0;                

                for (int j = 1; j <= rows; j++)

                {

                    System.out.print(num);                     

                    num = (num == 0)? 1 : 0;

                }

            }

            else

            {

                num = 1;                

                for (int j = 1; j <= rows; j++)

                {

                    System.out.print(num);                   

                    num = (num == 0)? 1 : 0;

                }

            }             

            System.out.println();

        }         

        sc.close();

    }

}

Explanation: This Java program generates a pattern where each row alternates between 1's and 0's. The pattern starts with 1 in the first row, and the numbers alternate between 1 and 0 in each column. For even-numbered rows, it starts with 0, and for odd-numbered rows, it starts with 1. The user inputs the number of rows, and the program uses nested loops to print the alternating numbers for each row.

Code Output: If the user inputs 5 for the number of rows, the output will be:

How many rows you want in this pattern?
5
Here is your pattern....!!!
10101
01010
10101
01010
10101

11. Ascending Triangle Pattern

This triangle starts with one element and gradually increases, often used to show ascending patterns in numerical or symbolic form.

Here are some of its key features:

• Focuses on progressive loops.
• Works with increasing sequence patterns.
• Good for visualizing gradual growth.

Pattern:

1

2 6

3 7 10 

4 8 11 13

5 9 12 14 15

Code:

import java.util.Scanner;

public class MainClass

{

    public static void main(String[] args) 

    {

        Scanner sc = new Scanner(System.in);      

        System.out.println(“How many rows you want in this pattern?”);       

        int rows = sc.nextInt();         

        System.out.println(“Here is your pattern….!!!”);         

        for (int i = 1; i <= rows; i++) 

        {

            int num = i;             

            for (int j = 1; j <= i; j++) 

            {

                System.out.print(num+” “);                 

                num = num+rows-j;

            }             

            System.out.println();

        }         

        sc.close();

    }

}

Explanation: This Java program generates a pattern where each row starts with the row number and increments by a decreasing value as the columns increase. The user inputs the number of rows, and the program uses two nested loops: the outer loop controls the rows, and the inner loop controls the printing of numbers in each row. The number starts from the row number i and increments by a decreasing value calculated as rows - j.

Code Output: If the user inputs 5 for the number of rows, the output will be:

How many rows you want in this pattern?
5
Here is your pattern....!!!
1 
2 6 
3 8 12 
4 10 15 19 
5 11 16 20 23

12. Square Java Pattern Program

This pattern creates a square of characters or digits, useful in teaching structured layouts and formatting.

Here are some of its key features:

• Easy to understand and implement.
• Builds familiarity with printing structured output.
• A common exercise in beginner coding challenges.

Pattern:

1 2 3 4 5 6 7 

2 3 4 5 6 7 1 

3 4 5 6 7 1 2 

4 5 6 7 1 2 3 

5 6 7 1 2 3 4 

6 7 1 2 3 4 5 

7 1 2 3 4 5 6 

Code:

import java.util.Scanner; 

public class MainClass

{

    public static void main(String[] args) 

    {

        Scanner sc = new Scanner(System.in);         

        System.out.println(“How many rows you want in this pattern?”);        

        int rows = sc.nextInt();         

        System.out.println(“Here is your pattern….!!!”);

        for(int i=1;i< rows+1 ;i++)

        {

            for(int j=i; j < rows+1 ;j++)

            {

                System.out.print(j + ” “);

            }

            for(int k=1; k < i ;k++)

            {

                System.out.print(k + ” “);

            }

            System.out.println();

        }       

        sc.close();

    }

}

Explanation: This Java program generates a pattern where each row contains a sequence of numbers. In the first part of each row, the numbers start from the current row index (i) and increase up to the total number of rows. The second part of each row starts from 1 and goes up to the row index minus 1. This creates a symmetric pattern. The user inputs the number of rows, and the program uses nested loops to print the sequence for each row.

Code Output: If the user inputs 5 for the number of rows, the output will be:

How many rows you want in this pattern?
5
Here is your pattern....!!!
5 
4 5 1 
3 4 5 1 2 
2 3 4 5 1 2 3 
1 2 3 4 5 1 2 3 4

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Now that you’re familiar with the pattern programs in Java, let’s look at how upGrad can help you learn Java Programming.

How upGrad Can Help You Learn Pattern Programs in Java?

Pattern programs in Java are essential in today's job market as it sharpens problem-solving skills and enhances understanding of core programming concepts like loops and arrays. It’s frequently used in technical interviews and coding challenges. 

This is where upGrad’s programming courses can help you. They offer expert-led sessions and hands-on exercises to help you master these concepts. With real-time feedback and personalized learning, it prepares you to excel in interviews and build a strong foundation for your software development career.

In addition to the courses covered in the blog, here are some programs to aid in your learning journey:

• Learn Basic Python Programming
• Java Object-oriented Programming
• Advanced JavaScript for All

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Reference:
https://www.ccbp.in/blog/articles/pattern-programs-in-java