Java Pattern Programs of Stars, Numbers and Alphabets

Here you will get list of java programs to print patterns of stars, numbers and alphabets. If you want code for any particular pattern then mention it in comment section, I will try to add the program here.

Java Pattern Programs

Patterns of Stars

Pattern 1:

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

***

****

*****

public class PrintPattern {
	public static void main(String args[]) {
		for(int i = 1; i <= 5; ++i) {
			for(int j = 1; j <= i; ++j)
				System.out.print("*");
			
			System.out.print("\n");
		}
	}
}

public class PrintPattern {

public static void main(String args[]) {

for(int i = 1; i <= 5; ++i) {

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

System.out.print("*");

System.out.print("\n");

}

Pattern 2:

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

***

****

*****

public class PrintPattern {
	public static void main(String args[]) {
		for(int i = 1; i <= 5; ++i) {
			for(int j = 4; j >= i; --j)
				System.out.print(" ");

			for(int k = 1; k <= i; ++k)
				System.out.print("*");
			
			System.out.print("\n");
		}
	}
}

public class PrintPattern {

public static void main(String args[]) {

for(int i = 1; i <= 5; ++i) {

for(int j = 4; j >= i; --j)

System.out.print(" ");

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

System.out.print("*");

System.out.print("\n");

}

Pattern 3:

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

*****

****

***

public class PrintPattern {
	public static void main(String args[]) {
		for(int i = 1; i <= 5; ++i) {
			for(int j = 5; j >= i; --j)
				System.out.print("*");
			
			System.out.print("\n");
		}
	}
}

public class PrintPattern {

public static void main(String args[]) {

for(int i = 1; i <= 5; ++i) {

for(int j = 5; j >= i; --j)

System.out.print("*");

System.out.print("\n");

}

Pattern 4:

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

*****

****

***

public class PrintPattern {
	public static void main(String args[]) {
		for(int i = 1; i <= 5; ++i) {
			for(int j = 1; j < i; ++j)
				System.out.print(" ");

			for(int k = 5; k >= i; --k)
				System.out.print("*");
			
			System.out.print("\n");
		}
	}
}

public class PrintPattern {

public static void main(String args[]) {

for(int i = 1; i <= 5; ++i) {

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

System.out.print(" ");

for(int k = 5; k >= i; --k)

System.out.print("*");

System.out.print("\n");

}

Pattern 5:

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

***

*****

*******

*********

public class PrintPattern {
	public static void main(String args[]) {
		for(int i = 1; i <= 5; ++i) {
			for(int j = 5; j > i; --j)
				System.out.print(" ");
			
			for(int k = 1; k < (i*2); ++k)
				System.out.print("*");
				
			System.out.print("\n");
		}
	}
}

public class PrintPattern {

public static void main(String args[]) {

for(int i = 1; i <= 5; ++i) {

for(int j = 5; j > i; --j)

System.out.print(" ");

for(int k = 1; k < (i*2); ++k)

System.out.print("*");

System.out.print("\n");

}

Pattern 6:

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

*********

*******

*****

***

public class PrintPattern {
	public static void main(String args[]) {
		for(int i = 1; i <= 5; ++i) {
			for(int j = 1; j < i; ++j)
				System.out.print(" ");
			
			for(int k = 10; k >= (i*2); --k)
				System.out.print("*");
				
			System.out.print("\n");
		}
	}
}

public class PrintPattern {

public static void main(String args[]) {

for(int i = 1; i <= 5; ++i) {

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

System.out.print(" ");

for(int k = 10; k >= (i*2); --k)

System.out.print("*");

System.out.print("\n");

}

Pattern 7:

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

* *

*********

public class PrintPattern {
	public static void main(String args[]) {
		for(int i = 1; i <= 5; ++i) {
			for(int j = 5; j > i; --j)
				System.out.print(" ");
			
			for(int k = 1; k < (i*2); ++k)
				if(k==1 || k==(i*2)-1 || i==5)
					System.out.print("*");
				else
					System.out.print(" ");
				
			System.out.print("\n");
		}
	}
}

public class PrintPattern {

public static void main(String args[]) {

for(int i = 1; i <= 5; ++i) {

for(int j = 5; j > i; --j)

System.out.print(" ");

for(int k = 1; k < (i*2); ++k)

if(k==1 || k==(i*2)-1 || i==5)

System.out.print("*");

else

System.out.print(" ");

System.out.print("\n");

}

Pattern 8:

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

*****

public class PrintPattern {
	public static void main(String args[]) {
		for(int i = 1; i <= 5; ++i) {
			for(int j = 1; j <= 5; ++j)
				System.out.print("*");
							
			System.out.print("\n");
		}
	}
}

public class PrintPattern {

public static void main(String args[]) {

for(int i = 1; i <= 5; ++i) {

for(int j = 1; j <= 5; ++j)

System.out.print("*");

System.out.print("\n");

}

Pattern 9:

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

*****

* *

*****

public class PrintPattern {
	public static void main(String args[]) {
		for(int i = 1; i <= 5; ++i) {			
			for(int j = 1; j <= 5; ++j)
				if(j==1 || j==5 || i==1 || i==5)
					System.out.print("*");
				else
					System.out.print(" ");
							
			System.out.print("\n");
		}
	}
}

public class PrintPattern {

public static void main(String args[]) {

for(int i = 1; i <= 5; ++i) {

for(int j = 1; j <= 5; ++j)

if(j==1 || j==5 || i==1 || i==5)

System.out.print("*");

else

System.out.print(" ");

System.out.print("\n");

}

Pattern 10:

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

*********

**** ****

*** ***

** **

* *

** **

*** ***

**** ****

*********

public class PrintPattern {
	public static void main(String args[]) {
		int i,j,k,m,n=5;
		
		for(i=1,m=-1;i<=n;++i,m+=2){
			if(i==1)
				for(j=1;j<n*2;++j)
					System.out.print("*");
			else{
				for(k=i;k<=n;++k)
					System.out.print("*");
				
				for(k=1;k<=m;++k)
					System.out.print(" ");
				
				for(k=i;k<=n;++k)
					System.out.print("*");
			}
			
			System.out.print("\n");
		}
		
		for(i=1,m=n*2-3;i<=n;++i,m-=2){
			if(i==n)
				for(j=1;j<n*2;++j)
					System.out.print("*");
			else{
				for(k=1;k<=i;++k)
					System.out.print("*");
				
				for(k=1;k<=m;++k)
					System.out.print(" ");
				
				for(k=1;k<=i;++k)
					System.out.print("*");
			}
			
			System.out.print("\n");
		}
	}
}

public class PrintPattern {

public static void main(String args[]) {

int i,j,k,m,n=5;

for(i=1,m=-1;i<=n;++i,m+=2){

if(i==1)

for(j=1;j<n*2;++j)

System.out.print("*");

else{

for(k=i;k<=n;++k)

System.out.print("*");

for(k=1;k<=m;++k)

System.out.print(" ");

for(k=i;k<=n;++k)

System.out.print("*");

}

System.out.print("\n");

}

for(i=1,m=n*2-3;i<=n;++i,m-=2){

if(i==n)

for(j=1;j<n*2;++j)

System.out.print("*");

else{

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

System.out.print("*");

for(k=1;k<=m;++k)

System.out.print(" ");

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

System.out.print("*");

}

System.out.print("\n");

}

Patterns of Numbers

Pattern 1:

123

1234

12345

public class PrintPattern {
	public static void main(String args[]) {
		for(int i = 1; i <= 5; ++i) {
			for(int j = 1; j <= i; ++j)
				System.out.print(j);
			
			System.out.print("\n");
		}
	}
}

public class PrintPattern {

public static void main(String args[]) {

for(int i = 1; i <= 5; ++i) {

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

System.out.print(j);

System.out.print("\n");

}

Pattern 2:

333

4444

55555

public class PrintPattern {
	public static void main(String args[]) {
		for(int i = 1; i <= 5; ++i) {
			for(int j = 1; j <= i; ++j)
				System.out.print(i);
			
			System.out.print("\n");
		}
	}
}

public class PrintPattern {

public static void main(String args[]) {

for(int i = 1; i <= 5; ++i) {

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

System.out.print(i);

System.out.print("\n");

}

Pattern 3:

321

4321

54321

public class PrintPattern {
	public static void main(String args[]) {
		for(int i = 1; i <= 5; ++i) {
			for(int j = 1, k=i; j <= i; ++j, --k)
				System.out.print(k);
			
			System.out.print("\n");
		}
	}
}

public class PrintPattern {

public static void main(String args[]) {

for(int i = 1; i <= 5; ++i) {

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

System.out.print(k);

System.out.print("\n");

}

Pattern 4:

This pattern is also known as pascal’s triangle.

1 1

1 2 1

1 3 3 1

1 4 6 4 1

public class PrintPattern {
	public static void main(String args[]) {
		int i,j,k,n=5;
		
		for(i=0;i<n;++i){
	        //loop to print spaces at starting of each row
	        for(j=1;j<=(n-i-1);++j){
	            System.out.print(" ");
	         }
	        
	        //loop to calculate each value in a row and print it
	        for(k=0;k<=i;++k){
	            System.out.print(fact(i)/(fact(i-k)*fact(k)) + " ");
	        }
	        
	        System.out.print("\n");
	    }
	}
	
	//function to calculate factorial
	static long fact(int x){
		int i;
		long f=1;
		
		for(i=1;i<=x;++i){
			f=f*i;
		}
		
		return f;
	}
}

public class PrintPattern {

public static void main(String args[]) {

int i,j,k,n=5;

for(i=0;i<n;++i){

//loop to print spaces at starting of each row

for(j=1;j<=(n-i-1);++j){

System.out.print(" ");

}

//loop to calculate each value in a row and print it

for(k=0;k<=i;++k){

System.out.print(fact(i)/(fact(i-k)*fact(k)) + " ");

}

System.out.print("\n");

}

//function to calculate factorial

static long fact(int x){

int i;

long f=1;

for(i=1;i<=x;++i){

f=f*i;

}

return f;

}

Patterns of Alphabets

Pattern 1:

A
AB
ABC
ABCD
ABCDE

ABC

ABCD

ABCDE

public class PrintPattern {
	public static void main(String args[]) {
		for(int i = 1; i <= 5; ++i) {
			for(int j = 0; j < i; ++j)
				System.out.print((char)('A' + j));
			
			System.out.print("\n");
		}
	}
}

public class PrintPattern {

public static void main(String args[]) {

for(int i = 1; i <= 5; ++i) {

for(int j = 0; j < i; ++j)

System.out.print((char)('A' + j));

System.out.print("\n");

}

Pattern 2:

A
BB
CCC
DDDD
EEEEE

CCC

DDDD

EEEEE

public class PrintPattern {
	public static void main(String args[]) {
		for(int i = 0; i < 5; ++i) {
			for(int j = 0; j <= i; ++j)
				System.out.print((char)('A' + i));
			
			System.out.print("\n");
		}
	}
}

public class PrintPattern {

public static void main(String args[]) {

for(int i = 0; i < 5; ++i) {

for(int j = 0; j <= i; ++j)

System.out.print((char)('A' + i));

System.out.print("\n");

}

Pattern 3:

A
BA
CBA
DCBA
EDCBA

CBA

DCBA

EDCBA

public class PrintPattern {
	public static void main(String args[]) {
		for(int i = 0; i < 5; ++i) {
			for(int j = 0, k=i; j <= i; ++j, --k)
				System.out.print((char)('A' + k));
			
			System.out.print("\n");
		}
	}
}

public class PrintPattern {

public static void main(String args[]) {

for(int i = 0; i < 5; ++i) {

for(int j = 0, k=i; j <= i; ++j, --k)

System.out.print((char)('A' + k));

System.out.print("\n");

}

Feel free to ask your queries related to above java pattern programs in comment section.

20 thoughts on “Java Pattern Programs of Stars, Numbers and Alphabets”

Kashish Gupta
November 16, 2017 at 4:58 am

I want this pattern, :
a b
aa bb
aaabbb

1. shivani madhavaram
  August 3, 2019 at 4:03 am
  
  class Untitled
  {
  public static void main(String[ ] args)
  {
  for(int i=1;i<=3;i++)
  {
  for(int j=1;j<=1;j++)
  {
  if(i==1)
  {
  System.out.print("a b");
  }
  else if(i==2)
  {
  System.out.print("aa bb");
  }
  else
  {
  System.out.print("aaabbb");
  }
  }
  System.out.println( );
  }
  }
  }
  
Mohsin Sayyed
November 18, 2017 at 9:11 am

Input
N=5

Output :
L
LE
LED
LE
L

How to print this pattern?

Ashlyn
March 28, 2018 at 1:22 pm

How to print
D
A
B A
C B A
D C B A

Siddhartha
April 26, 2018 at 2:56 am

How to print-
* *
* *
* *
* *
* *

1. shivani madhavaram
  August 3, 2019 at 3:51 am
  
  class Notepad
  {
  public static void main(String[ ] args)
  {
  for(int i=1;i<=5;i++)
  {
  for(int j=1;j<=1;j++)
  {
  System.out.print("**");
  }
  System.out.println( );
  }
  }
  }
  
Rahul Chavan
May 30, 2018 at 12:44 pm

A

B D

E H K

Rajesh
July 31, 2018 at 8:19 am

Input: PROGRAM
Output:
G
GR
GRA
GRAM
GRAMP
GRAMPR
GRAMPRO

Ashish
September 4, 2018 at 9:26 am

I want … this pattern
A
AB
ABA
ABAB
ABABA

Trisha jain
February 8, 2019 at 7:44 am

Can you please solve this:

a
a 1
a 2 a
a 3 a 4
a 5 a 6 a

1. Pravleen Singh
  June 16, 2019 at 8:44 am
  
  int max=10;
  int counter=0;
  int k=1;
  for(int i=0;i<max;i++)
  {
  
  for(int j=0;j<=i;j++)
  {
  if(j%2==0)
  {
  System.out.print("a");
  }
  else
  {
  System.out.print(k);
  k+=1;
  }
  }
  System.out.println();
  }
  
Rajagopal
February 12, 2019 at 4:22 pm

How to do this program.???
1234321
123 321
12 21
1 1

Kumar b
March 12, 2019 at 7:14 am

I want this a-b-c patterns con some one help ,me for this, i need code.

1. Pravleen Singh
  June 16, 2019 at 8:50 am
  
  Comment a sample pattern of which u need code of
  
  1. Sandy
    July 11, 2019 at 10:47 am
    
    *
    1 2
    * * *
    1 2 3 4
    
    1. Suresh
      September 22, 2019 at 7:25 am
      
      Send me code
      
  2. Vikas reddy
    July 24, 2019 at 5:27 am
    
    ABC
    ABC
    ABC
    
Devika
August 8, 2019 at 6:57 am

program for the below pattern??
AAAA1
AAA12
AA123
A1234
12345

1. Wijaya
  November 1, 2019 at 11:35 am
  
  How to do this program?
  Thank you
  *** *** ** *** **
  ** ** ** ** ** ** ** **
  ** *** ** ** ** ** **
  ** * ** ** ** ** **
  ** ** ** ** ** **
  ** ** **** ****
  
DENNY OOMMACHAN
March 2, 2020 at 4:03 am

how to make this pattern??

*
*A*
*A*A*