Top 10 Number pattern programs in java

In this article, you will see the Top 10 number pattern programs in java. These pattern programs will give you a better understanding of the logic for the number patterns.

The pattern programs are practically based on mathematical logic and matrices’ fundamentals. We recommend you, learn simple tricks to develop the logic for pattern printing in another article here: Pattern Printing Tricks.

top 10 number pattern programs

Let’s start understanding these patterns one by one.

Pattern-1

right triangle number pattern

Let’s see the java code to understand this pattern.

NumberPattern1.java

package com.javacodepoint.patterns;

public class NumberPattern1 {

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

}

Pattern-2

right triangle number pattern

Let’s see the java code to understand this pattern.

NumberPattern2.java

package com.javacodepoint.patterns;

public class NumberPattern2 {

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

}

Pattern-3

right triangle number pattern

Let’s see the java code to understand this pattern.

NumberPattern3.java

package com.javacodepoint.patterns;

public class NumberPattern3 {

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

}

Pattern-4

right triangle number pattern

Let’s see the java code to understand this pattern.

NumberPattern4.java

package com.javacodepoint.patterns;

public class NumberPattern4 {

	// Main Method
	public static void main(String[] args) {
		
		// Initializing required number of lines
		int n = 5;
		
		// Outer loop for the line change
		for(int i=1; i<=n; i++) {
			
			// Inner loop for the number printing
			for(int j=1; j<=i; j++) {
				
				// Printing the number without changing the line
				if(j%2 == 0)
					System.out.print("0 ");										
				else
					System.out.print("1 ");	
			}
			
			// Line change
			System.out.println();
		}
	}

}

Pattern-5

pyramid number pattern

Let’s see the java code to understand this pattern.

NumberPattern5.java

package com.javacodepoint.patterns;

public class NumberPattern5 {

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

}

Pattern-6

pyramid number pattern

Let’s see the java code to understand this pattern.

NumberPattern6.java

package com.javacodepoint.patterns;

public class NumberPattern6 {

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

}

Pattern-7

pyramid number pattern

Let’s see the java code to understand this pattern.

NumberPattern7.java

package com.javacodepoint.patterns;

public class NumberPattern7 {

	// Main Method
	public static void main(String[] args) {
		
		// Initializing required number of lines
		int n = 5;
		
		// Outer loop for the line change
		for(int i=1; i<=n; i++) {
			
			// Inner loop1 for the space printing
			for(int j=1; j<=(n-i); j++) {
				
				// Printing the 2 space without changing the line
				System.out.print("  ");
			}
			
			int num=0;
			
			// Inner loop2 for the number printing
			for(int k=1; k<=(2*i)-1; k++) {
				
				if(k <= i)		
					// Printing first half by increasing the number
					System.out.print((++num)+" ");
				else
					// Printing second half by decreasing the number
					System.out.print((--num)+" ");
			}
			
			// Line change
			System.out.println();
		}
	}

}

Pattern-8

diamond number pattern

Let’s see the java code to understand this pattern.

NumberPattern8.java

package com.javacodepoint.patterns;

public class NumberPattern8 {

	// Main Method
	public static void main(String[] args) {
		
		// Initializing required number of lines
		int n = 5;
				
		// Upper half
		// Outer loop for the line change
		for(int i=1; i<=n; i++) {
			
			// Inner loop1 for the space printing
			for(int j=1; j<=(n-i); j++) {
				
				// Printing the 2 spaces without changing the line
				System.out.print("  ");
			}
			
			int num=0;
			
			// Inner loop2 for the number printing
			for(int k=1; k<=(2*i)-1; k++) {
				
				if(k <= (2*i)/2 )		
					// Printing first half by increasing the number
					System.out.print((++num)+" ");
				else
					// Printing second half by decreasing the number
					System.out.print((--num)+" ");
			}
			
			// Line change
			System.out.println();
		}
		
		// Lower half
		// Outer loop for the line 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 2 spaces without changing the line
				System.out.print("  ");
			}
			
			int num=0;
			
			// Inner loop2 for the number printing
			for(int k=1; k<=(2*i)-1; k++) {
				
				if(k <= (2*i)/2 )		
					// Printing first half by increasing the number
					System.out.print((++num)+" ");
				else
					// Printing second half by decreasing the number
					System.out.print((--num)+" ");
			}
			
			// Line change
			System.out.println();
		}
	}

}

Pattern-9

diamond number pattern

Let’s see the java code to understand this pattern.

NumberPattern9.java

package com.javacodepoint.patterns;

public class NumberPattern9 {

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

}

Pattern-10

sandglass number pattern

Let’s see the java code to understand this pattern.

NumberPattern10.java

package com.javacodepoint.patterns;

public class NumberPattern10 {

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

}

Conclusion

In this article, you have seen the top 10 Number pattern programs in java.


All logical programs list


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