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.

5 comments

Kashish Gupta

November 16, 2017
4:58 am

I want this pattern, :
a b
aa bb
aaabbb
Mohsin Sayyed

November 18, 2017
9:11 am

Input
N=5

Output :
L
LE
LED
LE
L

How to print this pattern?
Ashlyn

March 28, 2018
1:22 pm

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

April 26, 2018
2:56 am

How to print-
* *
* *
* *
* *
* *
Rahul Chavan

May 30, 2018
12:44 pm

A

B D

E H K

Java Pattern Programs of Stars, Numbers and Alphabets