Top 30 star pattern programs in java

In this article, you will see the top 30 star pattern programs logic in java. Here we tried to provide the logic with a clear explanation for the java professional. Pattern programs are frequently asked in the fresher interview to check their logical skills.

star pattern printing programs

Before going through the logic for all these pattern programs, we recommend you to learn some basic tricks to develop the logic. Tricks will help you to develop the logic for Alphabet/Character pattern, and Number pattern programs also.

Visit the link: Star pattern programs [Tricks] in java.

Let us see the programs for all the above patterns one by one.

Pattern-1 (Right Triangle)

Right Triangle

StarPattern1.java

package com.javacodepoint.patterns;

public class StarPattern1 {

	// Main Method
	public static void main(String[] args) {
		
		// Initializing required number of lines/rows
		int n = 5;
		
		// Outer loop for the line/row change
		for(int i=1; i<=n; i++) {
			
			// Inner loop for the star printing
			for(int j=1; j<=i; j++) {
				
				// Printing the star without changing the line
				System.out.print("*");
			}
			
			// Line/Row change
			System.out.println();
		}
	}

}

Pattern-2 (Down Right Triangle)

Down Right Triangle

StarPattern2.java

package com.javacodepoint.patterns;

public class StarPattern2 {

	// Main Method
	public static void main(String[] args) {
		
		// Initializing required number of lines/rows
		int n = 5;
		
		// Outer loop for the line/row change
		for(int i=n; i>=1; i--) {
			
			// Inner loop for the star printing
			for(int j=1; j<=i; j++) {
				
				// Printing the star without changing the line
				System.out.print("*");
			}
			
			// Line/Row change
			System.out.println();
		}
	}

}

Pattern-3 (Mirrored Right Triangle)

Mirrored Right Triangle

StarPattern3.java

package com.javacodepoint.patterns;

public class StarPattern3 {

	// Main Method
	public static void main(String[] args) {
		
		// Initializing required number of lines/rows
		int n = 5;
		
		// Outer loop for the line/row change
		for(int i=1; i<=n; i++) {
			
			// Inner loop1 for the space printing
			for(int j=1; j<=(n-i); j++) {
				
				// Printing the space without changing the line
				System.out.print(" ");
			}
			
			// Inner loop2 for the star printing
			for(int k=1; k<=i; k++) {
				
				// Printing the star without changing the line
				System.out.print("*");
			}
			
			// Line/Row change
			System.out.println();
		}
	}

}


Pattern-4 (Down Mirrored Right Triangle)

Down Mirrored Right Triangle

StarPattern4.java

package com.javacodepoint.patterns;

public class StarPattern4 {

	// Main Method
	public static void main(String[] args) {
		
		// Initializing required number of lines/rows
		int n = 5;
		
		// Outer loop for the line/row change
		for(int i=n; i>=1; i--) {
			
			// Inner loop1 for the space printing
			for(int j=1; j<=(n-i); j++) {
				
				// Printing the space without changing the line
				System.out.print(" ");
			}
			
			// Inner loop for the star printing
			for(int k=1; k<=i; k++) {
				
				// Printing the star without changing the line
				System.out.print("*");
			}
			
			// Line/Row change
			System.out.println();
		}
	}

}

Pattern-5 (Right Pascal’s Triangle)

Right Pascal’s Triangle

StarPattern5.java

package com.javacodepoint.patterns;

public class StarPattern5 {

	// Main Method
	public static void main(String[] args) {
		
		// Initializing required number of lines/rows
		int n = 5;
		
		// Upper half
		// Outer loop for the line/row change
		for(int i=1; i<=n; i++) {
			
			// Inner loop for the star printing
			for(int j=1; j<=i; j++) {
				
				// Printing the star without changing the line
				System.out.print("*");
			}
			
			// Line/Row change
			System.out.println();
		}
		
		// Lower half
		// Outer loop for the line/row change
		for(int i=(n-1); i>=1; i--) {
			
			// Inner loop for the star printing
			for(int j=1; j<=i; j++) {
				
				// Printing the star without changing the line
				System.out.print("*");
			}
			
			// Line/Row change
			System.out.println();
		}
	}

}

Pattern-6 (K Shape Pattern)

K Shape Pattern

StarPattern6.java

package com.javacodepoint.patterns;

public class StarPattern6 {

	// Main Method
	public static void main(String[] args) {
		
		// Initializing required number of lines/rows
		int n = 5;
		
		// Upper half
		// Outer loop for the line/row change
		for(int i=n; i>=1; i--) {
			
			// Inner loop for the star printing
			for(int j=1; j<=i; j++) {
				
				// Printing the star without changing the line
				System.out.print("*");
			}
			
			// Line/Row change
			System.out.println();
		}
		
		// Lower half
		// Outer loop for the line/row change
		for(int i=2; i<=n; i++) {
			
			// Inner loop for the star printing
			for(int j=1; j<=i; j++) {
				
				// Printing the star without changing the line
				System.out.print("*");
			}
			
			// Line/Row change
			System.out.println();
		}
	}

}

Pattern-7 (Mirrored Right Pascal’s Triangle)

Mirrored Right Pascal’s Triangle

StarPattern7.java

package com.javacodepoint.patterns;

public class StarPattern7 {

	// Main Method
	public static void main(String[] args) {
		
		// Initializing required number of lines/rows
		int n = 5;
		
		// Upper half
		// Outer loop for the line/row change
		for(int i=1; i<=n; i++) {
			
			// Inner loop1 for the space printing
			for(int j=1; j<=(n-i); j++) {
				
				// Printing the space without changing the line
				System.out.print(" ");
			}
			
			// Inner loop2 for the star printing
			for(int k=1; k<=i; k++) {
				
				// Printing the star without changing the line
				System.out.print("*");
			}
			
			// Line/Row change
			System.out.println();
		}
		
		// Lower half
		// Outer loop for the line/row change
		for(int i=(n-1); i>=1; i--) {
			
			// Inner loop1 for the space printing
			for(int j=1; j<=(n-i); j++) {
				
				// Printing the space without changing the line
				System.out.print(" ");
			}
			
			// Inner loop2 for the star printing
			for(int k=1; k<=i; k++) {
				
				// Printing the star without changing the line
				System.out.print("*");
			}
			
			// Line/Row change
			System.out.println();
		}
	}

}

Pattern-8 (Reverse K Shape Pattern)

Reverse K Shape Pattern

StarPattern8.java

package com.javacodepoint.patterns;

public class StarPattern8 {

	// Main Method
	public static void main(String[] args) {
		
		// Initializing required number of lines/rows
		int n = 5;
		
		// First half
		// Outer loop for the line/row change
		for(int i=n; i>=1; i--) {
			
			// Inner loop1 for the space printing
			for(int j=1; j<=(n-i); j++) {
				
				// Printing the space without changing the line
				System.out.print(" ");
			}
			
			// Inner loop2 for the star printing
			for(int k=1; k<=i; k++) {
				
				// Printing the star without changing the line
				System.out.print("*");
			}
			
			// Line/Row change
			System.out.println();
		}
		
		// Second half
		// Outer loop for the line/row change
		for(int i=2; i<=n; i++) {
			
			// Inner loop1 for the space printing
			for(int j=1; j<=(n-i); j++) {
				
				// Printing the space without changing the line
				System.out.print(" ");
			}
			
			// Inner loop2 for the star printing
			for(int k=1; k<=i; k++) {
				
				// Printing the star without changing the line
				System.out.print("*");
			}
			
			// Line/Row change
			System.out.println();
		}
	}

}

Pattern-9 (Pyramid Pattern)

Pyramid Pattern

StarPattern9.java

package com.javacodepoint.patterns;

public class StarPattern9 {

	// Main Method
	public static void main(String[] args) {
		
		// Initializing required number of lines/rows
		int n = 5;
		
		// Outer loop for the line/row change
		for(int i=1; i<=n; i++) {
			
			// Inner loop1 for the space printing
			for(int j=1; j<=(n-i); j++) {
				
				// Printing the space without changing the line
				System.out.print(" ");
			}
			
			// Inner loop2 for the star printing
			for(int k=1; k<=(2*i)-1; k++) {
				
				// Printing the star without changing the line
				System.out.print("*");
			}
			
			// Line/Row change
			System.out.println();
		}
	}

}

Pattern-10 (Reversed Pyramid Pattern)

Reversed Pyramid Pattern

StarPattern10.java

package com.javacodepoint.patterns;

public class StarPattern10 {

	// Main Method
	public static void main(String[] args) {
		
		// Initializing required number of lines/rows
		int n = 5;
		
		// Outer loop for the line/row change
		for(int i=n; i>=1; i--) {
			
			// Inner loop1 for the space printing
			for(int j=1; j<=(n-i); j++) {
				
				// Printing the space without changing the line
				System.out.print(" ");
			}
			
			// Inner loop for the star printing
			for(int k=1; k<=(2*i)-1; k++) {
				
				// Printing the star without changing the line
				System.out.print("*");
			}
			
			// Line/Row change
			System.out.println();
		}
	}

}

Pattern-11 (Diamond Star Pattern)

Diamond Star Pattern

StarPattern11.java

package com.javacodepoint.patterns;

public class StarPattern11 {

	// Main Method
	public static void main(String[] args) {
		
		// Initializing required number of lines/rows
		int n = 5;
		
		// Upper half
		// Outer loop for the line/row change
		for(int i=1; i<=n; i++) {
			
			// Inner loop1 for the space printing
			for(int j=1; j<=(n-i); j++) {
				
				// Printing the space without changing the line
				System.out.print(" ");
			}
			
			// Inner loop2 for the star printing
			for(int k=1; k<=(2*i)-1; k++) {
				
				// Printing the star without changing the line
				System.out.print("*");
			}
			
			// Line/Row change
			System.out.println();
		}
		
		// Lower half
		// Outer loop for the line/row change
		for(int i=n-1; i>=1; i--) {
			
			// Inner loop1 for the space printing
			for(int j=1; j<=(n-i); j++) {
				
				// Printing the space without changing the line
				System.out.print(" ");
			}
			
			// Inner loop for the star printing
			for(int k=1; k<=(2*i)-1; k++) {
				
				// Printing the star without changing the line
				System.out.print("*");
			}
			
			// Line/Row change
			System.out.println();
		}
	}

}

Pattern-12 (Sandglass Star Pattern)

Sandglass Star Pattern

StarPattern12.java

package com.javacodepoint.patterns;

public class StarPattern12 {

	// Main Method
	public static void main(String[] args) {
		
		// Initializing required number of lines/rows
		int n = 5;
		
		// Upper half
		// Outer loop for the line/row change
		for(int i=n; i>=1; i--) {
			
			// Inner loop1 for the space printing
			for(int j=1; j<=(n-i); j++) {
				
				// Printing the space without changing the line
				System.out.print(" ");
			}
			
			// Inner loop for the star printing
			for(int k=1; k<=(2*i)-1; k++) {
				
				// Printing the star without changing the line
				System.out.print("*");
			}
			
			// Line/Row change
			System.out.println();
		}
		
		// Lower half
		// Outer loop for the line/row change
		for(int i=2; i<=n; i++) {
			
			// Inner loop1 for the space printing
			for(int j=1; j<=(n-i); j++) {
				
				// Printing the space without changing the line
				System.out.print(" ");
			}
			
			// Inner loop2 for the star printing
			for(int k=1; k<=(2*i)-1; k++) {
				
				// Printing the star without changing the line
				System.out.print("*");
			}
			
			// Line/Row change
			System.out.println();
		}
	}

}

Pattern-13

13. min

StarPattern13.java

package com.javacodepoint.patterns;

public class StarPattern13 {

	// Main Method
	public static void main(String[] args) {
		
		// Initializing required number of lines/rows
		int n = 5;
		
		// Outer loop for the line/row change
		for(int i=1; i<=n; i++) {
			
			// Inner loop1 for the star printing
			for(int j=1; j<=i; j++) {
				
				// Printing the star without changing the line
				System.out.print("*");
			}
			
			// Inner loop2 for the space printing
			for(int k=1; k<=2*(n-i); k++) {
				
				// Printing the space without changing the line
				System.out.print(" ");
			}
			
			// Inner loop3 for the again star printing
			for(int l=1; l<=i; l++) {
				
				// Printing the star without changing the line
				System.out.print("*");
			}
			
			// Line/Row change
			System.out.println();
		}
	}

}

Pattern-14

14. min

StarPattern14.java

package com.javacodepoint.patterns;

public class StarPattern14 {

	// Main Method
	public static void main(String[] args) {
		
		// Initializing required number of lines/rows
		int n = 5;
		
		// Outer loop for the line/row change
		for(int i=n; i>=1; i--) {
			
			// Inner loop1 for the star printing
			for(int j=1; j<=i; j++) {
				
				// Printing the star without changing the line
				System.out.print("*");
			}
			
			// Inner loop2 for the space printing
			for(int k=1; k<=2*(n-i); k++) {
				
				// Printing the space without changing the line
				System.out.print(" ");
			}
			
			// Inner loop3 for the again star printing
			for(int l=1; l<=i; l++) {
				
				// Printing the star without changing the line
				System.out.print("*");
			}
			
			// Line/Row change
			System.out.println();
		}
	}

}

Pattern-15 (H Shape Pattern)

H Shape pattern

StarPattern15.java

package com.javacodepoint.patterns;

public class StarPattern15 {

	// Main Method
	public static void main(String[] args) {
		
		// Initializing required number of lines/rows
		int n = 5;
		
		// Upper half
		// Outer loop for the line/row change
		for(int i=1; i<=n; i++) {
			
			// Inner loop1 for the star printing
			for(int j=1; j<=i; j++) {
				
				// Printing the star without changing the line
				System.out.print("*");
			}
			
			// Inner loop2 for the space printing
			for(int k=1; k<=2*(n-i); k++) {
				
				// Printing the space without changing the line
				System.out.print(" ");
			}
			
			// Inner loop3 for the again star printing
			for(int l=1; l<=i; l++) {
				
				// Printing the star without changing the line
				System.out.print("*");
			}
			
			// Line/Row change
			System.out.println();
		}
		
		// Lower half (skip the first line printing)
		// Outer loop for the line/row change
		for(int i=n-1; i>=1; i--) {
			
			// Inner loop1 for the star printing
			for(int j=1; j<=i; j++) {
				
				// Printing the star without changing the line
				System.out.print("*");
			}
			
			// Inner loop2 for the space printing
			for(int k=1; k<=2*(n-i); k++) {
				
				// Printing the space without changing the line
				System.out.print(" ");
			}
			
			// Inner loop3 for the again star printing
			for(int l=1; l<=i; l++) {
				
				// Printing the star without changing the line
				System.out.print("*");
			}
			
			// Line/Row change
			System.out.println();
		}
	}

}

Pattern-16

16. min

StarPattern16.java

package com.javacodepoint.patterns;

public class StarPattern16 {

	// Main Method
	public static void main(String[] args) {
		
		// Initializing required number of lines/rows
		int n = 5;
		
		// Upper half
		// Outer loop for the line/row change
		for(int i=n; i>=1; i--) {
			
			// Inner loop1 for the star printing
			for(int j=1; j<=i; j++) {
				
				// Printing the star without changing the line
				System.out.print("*");
			}
			
			// Inner loop2 for the space printing
			for(int k=1; k<=2*(n-i); k++) {
				
				// Printing the space without changing the line
				System.out.print(" ");
			}
			
			// Inner loop3 for the again star printing
			for(int l=1; l<=i; l++) {
				
				// Printing the star without changing the line
				System.out.print("*");
			}
			
			// Line/Row change
			System.out.println();
		}
		
		// Lower half
		// Outer loop for the line/row change
		for(int i=1; i<=n; i++) {
			
			// Inner loop1 for the star printing
			for(int j=1; j<=i; j++) {
				
				// Printing the star without changing the line
				System.out.print("*");
			}
			
			// Inner loop2 for the space printing
			for(int k=1; k<=2*(n-i); k++) {
				
				// Printing the space without changing the line
				System.out.print(" ");
			}
			
			// Inner loop3 for the again star printing
			for(int l=1; l<=i; l++) {
				
				// Printing the star without changing the line
				System.out.print("*");
			}
			
			// Line/Row change
			System.out.println();
		}
	}

}

Pattern-17 (Empty Right Triangle)

Empty Right Triangle

StarPattern17.java

package com.javacodepoint.patterns;

public class StarPattern17 {

	// Main Method
	public static void main(String[] args) {
		
		// Initializing required number of lines/rows
		int n = 5;
		
		// Outer loop for the line/row change
		for(int i=1; i<=n; i++) {
			
			// Inner loop for the star and space printing
			for(int j=1; j<=i; j++) {
				
				if( j == 1 || j == i || i==n ) {
					// Printing the star without changing the line
					System.out.print("*");
				}else {
					// Printing the space without changing the line
					System.out.print(" ");
				}
			}
			
			// Line/Row change
			System.out.println();
		}
	}

}

Pattern-18 (Down Empty Right Triangle)

Down Empty Right Triangle

StarPattern18.java

package com.javacodepoint.patterns;

public class StarPattern18 {

	// Main Method
	public static void main(String[] args) {
		
		// Initializing required number of lines/rows
		int n = 5;
		
		// Outer loop for the line/row change
		for(int i=n; i>=1; i--) {
			
			// Inner loop for the star and space printing
			for(int j=1; j<=i; j++) {
				
				if( j == 1 || j == i || i==n ) {
					// Printing the star without changing the line
					System.out.print("*");
				}else {
					// Printing the space without changing the line
					System.out.print(" ");
				}
			}
			
			// Line/Row change
			System.out.println();
		}
	}

}

Pattern-19 (Mirrored Empty Right Triangle)

Mirrored Empty Right Triangle

StarPattern19.java

package com.javacodepoint.patterns;

public class StarPattern19 {

	// Main Method
	public static void main(String[] args) {
		
		// Initializing required number of lines/rows
		int n = 5;
		
		// Outer loop for the line/row change
		for(int i=1; i<=n; i++) {
			
			// Inner loop1 for the space printing
			for(int j=1; j<=(n-i); j++) {
				
				// Printing the space without changing the line
				System.out.print(" ");
			}
			
			// Inner loop2 for the star and space printing
			for(int k=1; k<=i; k++) {
				
				if( k == 1 || k == i || i==n ) {
					// Printing the star without changing the line
					System.out.print("*");
				}else {
					// Printing the space without changing the line
					System.out.print(" ");
				}
				
			}
			
			// Line/Row change
			System.out.println();
		}
	}

}

Pattern-20 (Down Mirrored Empty Right Triangle)

Down Mirrored Empty Right Triangle

StarPattern20.java

package com.javacodepoint.patterns;

public class StarPattern20 {

	// Main Method
	public static void main(String[] args) {
		
		// Initializing required number of lines/rows
		int n = 5;
		
		// Outer loop for the line/row change
		for(int i=n; i>=1; i--) {
			
			// Inner loop1 for the space printing
			for(int j=1; j<=(n-i); j++) {
				
				// Printing the space without changing the line
				System.out.print(" ");
			}
			
			// Inner loop2 for the star and space printing
			for(int k=1; k<=i; k++) {
				
				if( k == 1 || k == i || i==n ) {
					// Printing the star without changing the line
					System.out.print("*");
				}else {
					// Printing the space without changing the line
					System.out.print(" ");
				}
				
			}
			
			// Line/Row change
			System.out.println();
		}
	}

}

Pattern-21 (Empty Pascal’s Triangle)

Empty Pascal's Triangle

StarPattern21.java

package com.javacodepoint.patterns;

public class StarPattern21 {

	// Main Method
	public static void main(String[] args) {
		
		// Initializing required number of lines/rows
		int n = 5;
		
		// Upper half
		// Outer loop for the line/row change
		for(int i=1; i<=n; i++) {
			
			// Inner loop for the star printing
			for(int j=1; j<=i; j++) {
				
				if( j == 1 || j == i ) {
					// Printing the star without changing the line
					System.out.print("*");
				}else {
					// Printing the space without changing the line
					System.out.print(" ");
				}
			}
			
			// Line/Row change
			System.out.println();
		}
		
		// Lower half (skip the first line to print)
		// Outer loop for the line/row change
		for(int i=n-1; i>=1; i--) {
			
			// Inner loop for the star printing
			for(int j=1; j<=i; j++) {
				
				if( j == 1 || j == i || i==n ) {
					// Printing the star without changing the line
					System.out.print("*");
				}else {
					// Printing the space without changing the line
					System.out.print(" ");
				}
			}
			
			// Line/Row change
			System.out.println();
		}
	}

}

Pattern-22

22. min

StarPattern22.java

package com.javacodepoint.patterns;

public class StarPattern22 {

	// Main Method
	public static void main(String[] args) {
		
		// Initializing required number of lines/rows
		int n = 5;
		
		// Upper half
		// Outer loop for the line/row change
		for(int i=n; i>=1; i--) {
			
			// Inner loop for the star printing
			for(int j=1; j<=i; j++) {
				
				if( j == 1 || j == i || i==n ) {
					// Printing the star without changing the line
					System.out.print("*");
				}else {
					// Printing the space without changing the line
					System.out.print(" ");
				}
			}
			
			// Line/Row change
			System.out.println();
		}
		
		// Lower half (skip the first line to print)
		// Outer loop for the line/row change
		for(int i=2; i<=n; i++) {
			
			// Inner loop for the star printing
			for(int j=1; j<=i; j++) {
				
				if( j == 1 || j == i || i==n ) {
					// Printing the star without changing the line
					System.out.print("*");
				}else {
					// Printing the space without changing the line
					System.out.print(" ");
				}
			}
			
			// Line/Row change
			System.out.println();
		}
	}

}

Pattern-23 (Mirrored Empty Pascal’s Triangle)

Mirrored Empty Pascal's Triangle

StarPattern23.java

package com.javacodepoint.patterns;

public class StarPattern23 {

	// Main Method
	public static void main(String[] args) {
		
		// Initializing required number of lines/rows
		int n = 5;
		
		// Upper half
		// Outer loop for the line/row change
		for(int i=1; i<=n; i++) {
			
			// Inner loop1 for the space printing
			for(int j=1; j<=(n-i); j++) {
				
				// Printing the space without changing the line
				System.out.print(" ");
			}
			
			// Inner loop2 for the star and space printing
			for(int k=1; k<=i; k++) {
				
				if( k == 1 || k == i ) {
					// Printing the star without changing the line
					System.out.print("*");
				}else {
					// Printing the space without changing the line
					System.out.print(" ");
				}
			}
			
			// Line/Row change
			System.out.println();
		}
		
		// Lower half
		// Outer loop for the line/row change
		for(int i=(n-1); i>=1; i--) {
			
			// Inner loop1 for the space printing
			for(int j=1; j<=(n-i); j++) {
				
				// Printing the space without changing the line
				System.out.print(" ");
			}
			
			// Inner loop2 for the star and space printing
			for(int k=1; k<=i; k++) {
				
				if( k == 1 || k == i || i==n ) {
					// Printing the star without changing the line
					System.out.print("*");
				}else {
					// Printing the space without changing the line
					System.out.print(" ");
				}
			}
			
			// Line/Row change
			System.out.println();
		}
	}

}

Pattern-24

24. min

StarPattern24.java

package com.javacodepoint.patterns;

public class StarPattern24 {

	// Main Method
	public static void main(String[] args) {
		
		// Initializing required number of lines/rows
		int n = 5;
		
		// Upper half
		// Outer loop for the line/row change
		for(int i=n; i>=1; i--) {
			
			// Inner loop1 for the space printing
			for(int j=1; j<=(n-i); j++) {
				
				// Printing the space without changing the line
				System.out.print(" ");
			}
			
			// Inner loop2 for the star and space printing
			for(int k=1; k<=i; k++) {
				
				if( k == 1 || k == i || i==n ) {
					// Printing the star without changing the line
					System.out.print("*");
				}else {
					// Printing the space without changing the line
					System.out.print(" ");
				}
			}
			
			// Line/Row change
			System.out.println();
		}
		
		// Lower half
		// Outer loop for the line/row change
		for(int i=2; i<=n; i++) {
			
			// Inner loop1 for the space printing
			for(int j=1; j<=(n-i); j++) {
				
				// Printing the space without changing the line
				System.out.print(" ");
			}
			
			// Inner loop2 for the star and space printing
			for(int k=1; k<=i; k++) {
				
				if( k == 1 || k == i || i==n ) {
					// Printing the star without changing the line
					System.out.print("*");
				}else {
					// Printing the space without changing the line
					System.out.print(" ");
				}
			}
			
			// Line/Row change
			System.out.println();
		}
	}

}

Pattern-25 (Empty Triangle)

Empty Triangle

StarPattern25.java

package com.javacodepoint.patterns;

public class StarPattern25 {

	// Main Method
	public static void main(String[] args) {
		
		// Initializing required number of lines/rows
		int n = 5;
		
		// Outer loop for the line/row change
		for(int i=1; i<=n; i++) {
			
			// Inner loop1 for the space printing
			for(int j=1; j<=(n-i); j++) {
				
				// Printing the space without changing the line
				System.out.print(" ");
			}
			
			// Inner loop2 for the star and space printing
			for(int k=1; k<=(2*i)-1; k++) {
				
				if( k == 1 || k == (2*i)-1 || i==n ) {
					// Printing the star without changing the line
					System.out.print("*");
				}else {
					// Printing the space without changing the line
					System.out.print(" ");
				}
			}
			
			// Line/Row change
			System.out.println();
		}
	}

}

Pattern-26 (Down Empty Triangle)

Down Empty Triangle

StarPattern26.java

package com.javacodepoint.patterns;

public class StarPattern26 {

	// Main Method
	public static void main(String[] args) {
		
		// Initializing required number of lines/rows
		int n = 5;
		
		// Outer loop for the line/row change
		for(int i=n; i>=1; i--) {
			
			// Inner loop1 for the space printing
			for(int j=1; j<=(n-i); j++) {
				
				// Printing the space without changing the line
				System.out.print(" ");
			}
			
			// Inner loop2 for the star and space printing
			for(int k=1; k<=(2*i)-1; k++) {
				
				if( k == 1 || k == (2*i)-1 || i==n ) {
					// Printing the star without changing the line
					System.out.print("*");
				}else {
					// Printing the space without changing the line
					System.out.print(" ");
				}
			}
			
			// Line/Row change
			System.out.println();
		}
	}

}

Pattern-27 (Empty Diamond Pattern)

Empty Diamond Pattern

StarPattern27.java

package com.javacodepoint.patterns;

public class StarPattern27 {

	// Main Method
	public static void main(String[] args) {
		
		// Initializing required number of lines/rows
		int n = 5;
		
		// Upper half
		// Outer loop for the line/row change
		for(int i=1; i<=n; i++) {
			
			// Inner loop1 for the space printing
			for(int j=1; j<=(n-i); j++) {
				
				// Printing the space without changing the line
				System.out.print(" ");
			}
			
			// Inner loop2 for the star and space printing
			for(int k=1; k<=(2*i)-1; k++) {
				
				if( k == 1 || k == (2*i)-1 ) {
					// Printing the star without changing the line
					System.out.print("*");
				}else {
					// Printing the space without changing the line
					System.out.print(" ");
				}
			}
			
			// Line/Row change
			System.out.println();
		}
		
		// Lower half (skip the first line of printing)
		// Outer loop for the line/row change
		for(int i=n-1; i>=1; i--) {
			
			// Inner loop1 for the space printing
			for(int j=1; j<=(n-i); j++) {
				
				// Printing the space without changing the line
				System.out.print(" ");
			}
			
			// Inner loop2 for the star and space printing
			for(int k=1; k<=(2*i)-1; k++) {
				
				if( k == 1 || k == (2*i)-1 || i==n ) {
					// Printing the star without changing the line
					System.out.print("*");
				}else {
					// Printing the space without changing the line
					System.out.print(" ");
				}
			}
			
			// Line/Row change
			System.out.println();
		}
	}

}

Pattern-28 (Sandglass Pattern)

Sandglass Pattern

StarPattern28.java

package com.javacodepoint.patterns;

public class StarPattern28 {

	// Main Method
	public static void main(String[] args) {
		
		// Initializing required number of lines/rows
		int n = 5;
		
		// Upper half
		// Outer loop for the line/row change
		for(int i=n; i>=1; i--) {
			
			// Inner loop1 for the space printing
			for(int j=1; j<=(n-i); j++) {
				
				// Printing the space without changing the line
				System.out.print(" ");
			}
			
			// Inner loop2 for the star and space printing
			for(int k=1; k<=(2*i)-1; k++) {
				
				if( k == 1 || k == (2*i)-1 || i==n ) {
					// Printing the star without changing the line
					System.out.print("*");
				}else {
					// Printing the space without changing the line
					System.out.print(" ");
				}
			}
			
			// Line/Row change
			System.out.println();
		}
		
		// Lower half (skip the first line of printing)
		// Outer loop for the line/row change
		for(int i=2; i<=n; i++) {
			
			// Inner loop1 for the space printing
			for(int j=1; j<=(n-i); j++) {
				
				// Printing the space without changing the line
				System.out.print(" ");
			}
			
			// Inner loop2 for the star and space printing
			for(int k=1; k<=(2*i)-1; k++) {
				
				if( k == 1 || k == (2*i)-1 || i==n ) {
					// Printing the star without changing the line
					System.out.print("*");
				}else {
					// Printing the space without changing the line
					System.out.print(" ");
				}
			}
			
			// Line/Row change
			System.out.println();
		}
	}

}

Pattern-29 (Square Pattern)

Square Pattern

StarPattern29.java

package com.javacodepoint.patterns;

public class StarPattern29 {

	// Main Method
	public static void main(String[] args) {
		
		// Initializing required number of lines/rows
		int n = 5;
		
		// Outer loop for the line/row change
		for(int i=1; i<=n; i++) {
			
			// Inner loop for the star printing
			for(int j=1; j<=n; j++) {
				
				// Printing the star without changing the line
				System.out.print("*");
			}
			
			// Line/Row change
			System.out.println();
		}
	}

}

Pattern-30 (Empty Square Pattern)

Empty Square Pattern

StarPattern30.java

package com.javacodepoint.patterns;

public class StarPattern30 {

	// Main Method
	public static void main(String[] args) {
		
		// Initializing required number of lines/rows
		int n = 5;
		
		// Outer loop for the line/row change
		for(int i=1; i<=n; i++) {
			
			// Inner loop for the star and space printing
			for(int j=1; j<=n; j++) {
				
				if( i == 1 || j == 1 || i==n || j==n ) {
					// Printing the star without changing the line
					System.out.print("*");
				}else {
					// Printing the space without changing the line
					System.out.print(" ");
				}
			}
			
			// Line/Row change
			System.out.println();
		}
	}

}

Conclusion

In this article, you have learned how to print star patterns in java. Here you have seen top 30 star pattern programs written in java.

You can learn the Tricks to develop the logic for almost all types of pattern printing programs.

Visit our another article link: Star pattern programs [Tricks] in java


All logical programs list


Leave a Reply

Your email address will not be published.