Java Pyramid Examples

Java Array Examples

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• Java Array Simple Program
• Java Array - Create, Declare, Initialize and Print Examples
• How to Initialize an Array in Java in One Line
• What's the Simplest Way to Print a Java Array?
• Create and Initialize Two Dimensional Array in Java
• How to Check if Two Arrays are Equal in Java
• Java ArrayBlockingQueue Example
• Java Convert Array to Set
• Copying part of Array in Java Example
• Sorting an Array using Arrays.sort() Method
• Check Two Arrays are Deeply Equal
• Java Arrays.copyOf() Example - Copying an Array
• Java Arrays.binarySearch() Example - Searching an Array
• Java Arrays.asList() Example - Convert Array to ArrayList
• Java Convert Array to Stack Example
• Java Pyramid Examples

In this post, we will demonstrate the following Java pyramid examples.

1. Triangle Pyramid Example
2. Reverse Triangle Pyramid Example
3. Pyramid Example
4. Reverse Pyramid Example

Java Pyramid Examples

1. Triangle Pyramid Example

package net.javaguides.corejava.arrays.programs;

public class TrianglePyramid {

    public static void main(final String[] args) {
        trianglePyramid(10);
    }

    public static void trianglePyramid(final int n) {
        for (int i = 0; i < n; i++) {
            for (int j = 0; j <= i; j++) {
                System.out.print("*");
            }
            System.out.println();
        }
    }
}

Output:

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

2. Reverse Triangle Pyramid Example

package net.javaguides.corejava.arrays.programs;

public class ReverserTrianglePyramid {

    public static void main(final String[] args) {

        reverserTrianglePyramid(10);
    }

    public static void reverserTrianglePyramid(final int n) {
        for (int i = n; i > 0; i--) {
            for (int j = 1; j <= i; j++) {
                System.out.print("*");
            }
            System.out.print("\n");
        }
    }
}

Output:

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

3. Pyramid Example

package net.javaguides.corejava.arrays.programs;

public class PyramidExample {

    public static void main(final String[] args) {
        pyramid(10);
    }

    public static void pyramid(final int n) {
        for (int i = 0; i < n; i++) {
            for (int j = 0; j < n - i; j++) {
                System.out.print(" ");
            }
            for (int k = 0; k <= i; k++) {
                System.out.print("* ");
            }
            System.out.println();
        }
    }
}

Output:

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

4. Reverse Pyramid Example

package net.javaguides.corejava.arrays.programs;

public class PyramidsExamples {

    public static void main(final String[] args) {
        reversePyramid(10);
    }

    public static void reversePyramid(final int n) {
        for (int i = n; i >= 0; i--) {

            for (int j = 0; j <= n - i; j++) {
                System.out.print(" ");
            }

            for (int k = 0; k <= i; k++) {
                System.out.print("* ");
            }
            System.out.println();
        }
    }
}

Output:

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

Reference

https://www.javaguides.net