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Java code to create a pyramid and patterns

Java Examples Comprehensive

In this program, you will learn how to create a pyramid, semi-pyramid, inverted pyramid, Pascal triangle, and Floyd triangle in Java using specific statements.

Source code list
Use*,print triangle with numbers and characters code
Use*and code to print inverted triangle with numbers
Print complete pyramid code
Print Pascal triangle code
Print Floyd triangle code

Program used*,print triangle with numbers and characters

Example1:Use*Program to print the semi-pyramid

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

Source Code

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

Example2:Program to print the semi-pyramid with numbers a

1
1 2
1 2 3
1 2 3 4
1 2 3 4 5

Source Code

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

Example3:Program to print the semi-pyramid with letters

A
B B
C C C
D D D D
E E E E E

Source Code

public class Pattern {
    public static void main(String[] args) {
        char last = 'E', alphabet = 'A';
        for(int i = 1; i <= (last-'A'+1); ++i) {
            for(int j = 1; j <= i; ++j) {
                System.out.print(alphabet + "	");
            }
            ++alphabet;
            System.out.println();
        }
    }
}

Program used*and programs to print the inverted semi-pyramid with numbers

Example4:Use*Inverted semi-pyramid

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

Source Code

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

Example5:Use numbers to print the inverted semi-pyramid

1 2 3 4 5
1 2 3 4 
1 2 3
1 2
1

Source Code

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

 Use*and programs with numbers to display the pyramid and inverted pyramid

Example6:Use*Program to print the complete pyramid

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

Source Code

public class Pattern {
    public static void main(String[] args) {
        int rows = 5, k = 0;
        for(int i = 1; i <= rows; ++i, k = 0) {
            for(int space = 1; space <= rows; - i; ++space) {
                System.out.print("		");
            }
            while(k != 2 * i; - 1) {
                System.out.print("* );
                ++k;
            }
            System.out.println();
        }
    }
}

Example7:Use numbers to print the pyramid program

        1
      2 3 2
    3 4 5 4 3
  4 5 6 7 6 5 4
5 6 7 8 9 8 7 6 5

Source Code

public class Pattern {
    public static void main(String[] args) {
        int rows = 5, k = 0, count = 0, count1 = 0;
        for(int i = 1; i <= rows; ++i) {
            for(int space = 1; space <= rows; - i; ++space) {
                System.out.print("		");
                ++count;
            }
            while(k != 2 * i; - 1) {
                if (count <= rows - 1) {
                    System.out.print((i + k) + "	");
                    ++count;
                }
                else {
                    ++count1;
                    System.out.print((i + k; - 2 * count1) + "	");
                }
                ++k;
            }
            count1 = count = k = 0;
            System.out.println();
        }
    }
}

Example8:Use*Invert the complete pyramid

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

Source Code

public class Pattern {
    public static void main(String[] args) {
        int rows = 5;
        for(int i = rows; i >= 1; --i) {
            for(int space = 1; space <= rows; - i; ++space) {
                System.out.print("		");
            }
            for(int j = i; j <= 2 * i; - 1; ++j) {
                System.out.print("* );
            }
            for(int j = 0; j < i; - 1; ++j) {
                System.out.print("* );
            }
            System.out.println();
        }
    }
}

Example9:Print Pascal's triangle

           1
         1   1
       1   2   1
     1   3   3    1
   1   4   6   4   1
 1   5   10   10  5   1

Source Code

public class Pattern {
    public static void main(String[] args) {
        int rows = 6, coef = 1;
        for(int i = 0; i < rows;++) {
            for(int space = 1; space < rows - i; ++space) {
                System.out.print("		");
            }
            for(int j = 0; j <= i; j++) {
                if (j == 0 || i == 0)
                    coef = 1;
                else
                    coef = coef * (i - j + 1) / j;
                System.out.printf("%4d", coef);
            }
            System.out.println();
        }
    }
}

Example10:Print Floyd's Triangle.

1
2 3
4 5 6
7 8 9 10

Source Code

public class Pattern {
    public static void main(String[] args) {
        int rows = 4, number = 1;
        for(int i = 1; i <= rows; i++) {
            for(int j = 1; j <= i; j++) {
                System.out.print(number + "	");
                ++number;
            }
            System.out.println();
        }
    }
}

Java Examples Comprehensive