Tag: java pattern program

Java String Pattern: 5

In this tutorial, we will go through the string pattern program in java. Before that, you may go through the following topic in java.

for loop in java
String in Java

String Pattern:

import java.util.Scanner;

public class Main
{
  public static void main(String args[])
  {
    int i, j;
    String str;
    char[] ch;
    Scanner sc = new Scanner(System.in);

    System.out.print("Enter the string: ");
    str = sc.nextLine();

    ch = str.toCharArray();

    for (i = ch.length - 1; i >= 0; i--)
    {
      for (j = 0; j <= i; j++)
        System.out.print(ch[j] + " ");

      System.out.println();
    }
  }
}

Enter the string: SIMPLE S I M P L E S I M P L S I M P S I M S I S

3 November 2021

Java String Pattern: 4

In this tutorial, we will go through the string pattern program in java. Before that, you may go through the following topic in java.

for loop in java
String in Java

String Pattern:

import java.util.Scanner;

public class Main
{
  public static void main(String args[])
  {
    int i, j;
    String str;
    char[] ch;
    Scanner sc = new Scanner(System.in);

    System.out.print("Enter the string: ");
    str = sc.nextLine();

    ch = str.toCharArray();

    for (i = 0; i < ch.length; i++)
    {
      for (j = 0; j <= i; j++)
        System.out.print(ch[j] + " ");

      System.out.println();
    }
  }
}

Output:

Enter the string: SIMPLE S S I S I M S I M P S I M P L S I M P L E

3 November 2021

Java String Pattern: 3

In this tutorial, we will go through the string pattern program in java. Before that, you may go through the following topic in java.

for loop in java
String in Java

String Pattern:

public class Main
{
  public static void main(String args[])
  {
    String str = "SIMPLE";
    int i, j, k;
    int length = str.length();

    for (i = 0; i < length; i++)
    {
      for (j = length - 1; j > i; j--)
      {
        System.out.print("  ");
      }

      for (k = 0; k <= i; k++)
      {
        System.out.print(str.charAt(k) + " ");
      }

      System.out.println();
    }
  }
}

Output:

          S
        S I
      S I M
    S I M P
  S I M P L
S I M P L E

3 November 2021

Java String Pattern: 2

In this tutorial, we will go through the string pattern program in java. Before that, you may go through the following topic in java.

for loop in java
String in Java

String Pattern:

import java.util.Scanner;

public class Main
{
  public static void main(String args[])
  {
    String str;
    int i, j;
    char[] ch;
    Scanner sc = new Scanner(System.in);

    System.out.print("Enter a Word: ");
    str = sc.nextLine();

    ch = str.toCharArray();
    int strLength = ch.length;

    for (i = 0; i < strLength; i++)
    {
      for (j = 1; j <= strLength; j++)
      {
        System.out.print(str.charAt(strLength - j) + " ");
      }

      System.out.println();
    }
  }
}

Output:

Enter a Word: SIMPLE E L P M I S E L P M I S E L P M I S E L P M I S E L P M I S E L P M I S

3 November 2021

Java String Pattern: 1

In this tutorial, we will go through the string pattern program in java. Before that, you may go through the following topic in java.

for loop in java
String in Java

String Pattern:

public class Main
{
  public static void main(String args[])
  {
    String str = "SIMPLE";
    int length = str.length();	//length of the string

    for (int i = 0; i < length; i++)
    {
      for (int j = 0; j < length; j++)
      {
        System.out.print(str.charAt(j) + " ");
      }

      System.out.println();
    }
  }
}

Output:

S I M P L E S I M P L E S I M P L E S I M P L E S I M P L E S I M P L E

3 November 2021

Half Repeated Character Pattern in Java

In this tutorial, we will go through alphabet pattern programs in java programming. Before that, you may go through the following topic in java.

for loop in java

Half Repeated Character Pattern in Java

import java.util.Scanner;

public class Main
{
  public static void main(String args[])
  {
    int rows, i, j, k;
    Scanner sc = new Scanner(System.in);

    System.out.print("Enter the no. of rows: ");
    rows = sc.nextInt();

    for (i = 0; i <= rows; i++)
    {
      int alphabet = 65;
      for (j = 0; j < i; j++)
        System.out.print(" ");

      for (k = i; k <= rows; k++)
        System.out.print((char)(alphabet + k));

      System.out.println();
    }
    for (i = rows; i >= 0; i--)
    {
      int alphabet = 65;
      for (j = 0; j < i; j++)
        System.out.print(" ");

      for (k = i; k <= rows; k++)
        System.out.print((char)(alphabet + k));

      System.out.println();
    }
  }
}

Output:

Enter the no. of rows: 5
ABCDEF
 BCDEF
  CDEF
   DEF
    EF
     F
     F
    EF
   DEF
  CDEF
 BCDEF
ABCDEF

30 October 2021

2 Different Alphabet Patterns in Java (half hourglass)

In this tutorial, we will go through two different alphabet pattern programs in java programming. Before that, you may go through the following topic in java.

for loop in java

2 different Alphabet pattern program in Java

Both of the programs below take the number of rows as the user input and using for loop it prints the desired output.

Pattern 1:

import java.util.Scanner;

public class Main
{
  public static void main(String args[])
  {
    int rows, i, j;
    Scanner sc = new Scanner(System.in);

    System.out.print("Enter the no. of rows: ");
    rows = sc.nextInt();

    //upper part
    for (i = rows; i >= 0; i--)
    {
      int character = 65;
      for (j = 0; j <= i; j++)
        System.out.print((char)(character + j) + " ");

      System.out.println();
    }
    //lower part
    for (i = 0; i <= rows; i++)
    {
      int character = 65;
      for (j = 0; j <= i; j++)
        System.out.print((char)(character + j) + " ");

      System.out.println();
    }
  }
}

Output:

Enter the no. of rows: 5 A B C D E F A B C D E A B C D A B C A B A A A B A B C A B C D A B C D E A B C D E F

Pattern 2:

import java.util.Scanner;

public class Main
{
  public static void main(String args[])
  {
    int rows, i, j;
    Scanner sc = new Scanner(System.in);

    System.out.print("Enter the no. of rows: ");
    rows = sc.nextInt();

    //upper part
    for (i = rows; i >= 0; i--)
    {
      int character = 65;
      for (j = i; j >= 0; j--)
        System.out.print((char)(character + j) + " ");

      System.out.println();
    }
    //lower part
    for (i = 0; i <= rows; i++)
    {
      int character = 65;
      for (j = i; j >= 0; j--)
        System.out.print((char)(character + j) + " ");

      System.out.println();
    }
  }
}

Output:

Enter the no. of rows: 5 F E D C B A E D C B A D C B A C B A B A A A B A C B A D C B A E D C B A F E D C B A

30 October 2021

Half Hourglass Star Pattern in Java

In this tutorial, we will write a java program to print half sandglass star patterns. Before that, you may go through the following topic in java.

for loop in java

The program below takes a user input for the number of rows needed and then in decreasing order of the first half is printed and then the increasing order of the second half of the half part of sandglass is printed.

This is a half hourglass pattern program in java or you can say half sandglass pattern program using a star.

Half Hourglass Star Pattern in Java

import java.util.Scanner;

public class Main
{
  public static void main(String[] args)
  {
    int rows, i, j, k;
    Scanner sc = new Scanner(System.in);

    System.out.print("Enter the number of rows: ");
    rows = sc.nextInt();

    System.out.print("Output: \n\n");
    //upper half
    for (i = 1; i <= rows; i++)
    {
      for (k = 1; k < i; k++)
        System.out.print(" ");

      for (j = i; j <= rows; j++)
        System.out.print("*");

      System.out.println();
    }

    //lower half
    for (i = rows - 1; i >= 1; i--)
    {
      for (k = 1; k < i; k++)
        System.out.print(" ");

      for (j = i; j <= rows; j++)
        System.out.print("*");

      System.out.println();
    }
  }
}

Output:

29 October 2021

Hollow Inverted Right Triangle Star Pattern in Java

In this tutorial, we will write a java program to print hollow inverted right triangle star pattern. Before that, you may go through the following topic in java.

for loop in java

We will display the hollow inverted right triangle pattern of stars in java using different loops. We will use for loop and while and write two different codes.

The programs however take the number of rows as an input from the user and print the hollow pattern. There is a use of if..else statement in the program to check the boolean condition. It is placed inside the for loop and while loop.

Hollow Inverted Right Triangle Star Pattern in Java

Using For Loop

import java.util.Scanner;

public class Main
{
  public static void main(String args[])
  {
    int rows, i, j, k;
    Scanner sc = new Scanner(System.in);

    System.out.print("Enter the no. of rows: ");
    rows = sc.nextInt();

    for (i = rows; i > 0; i--)
    {
      if (i == 1 || i == rows)
      {
        for (j = 1; j <= i; j++)
          System.out.print("*");
      }
      else
      {
        for (k = 1; k <= i; k++)
        {
          if (k == 1 || k == i)
            System.out.print("*");
          else
            System.out.print(" ");
        }
      }
      System.out.println();
    }
  }
}

Output:

Using While Loop

import java.util.Scanner;

public class Main
{
  public static void main(String args[])
  {
    int rows, i, j;
    Scanner sc = new Scanner(System.in);

    System.out.print("Enter the no. of rows: ");
    rows = sc.nextInt();
    i = rows;

    while (i > 0)
    {
      j = 1;
      while (j <= i)
      {
        if (j == 1 || j == i || i == 1 || i == rows)
          System.out.print("*");
        else
          System.out.print(" ");
        j++;
      }
      System.out.println();
      i--;
    }
  }
}

Output:

8 October 2021

Square Number Pattern in Java: 1

In this tutorial, we will go through the square number pattern program in java. Before that, you may go through the following topic in java.

for loop in java

Number Square Pattern Programs in Java

The programs below take the user input for the number of rows to be displayed in the pattern. We have used a for loop to iterate.

Pattern 1:

import java.util.Scanner;

public class Main
{
  public static void main(String args[])
  {
    int rows, i, j;
    Scanner sc = new Scanner(System.in);

    System.out.print("Enter the no. of rows: ");
    rows = sc.nextInt();

    for (i = 1; i <= rows; i++)
    {
      for (j = 1; j < i; j++)
        System.out.print("0 ");

      System.out.print(i + " ");

      for (j = i; j < rows; j++)
        System.out.print("0 ");

      System.out.println();
    }
  }
}

Output:

Enter the no. of rows: 5 1 0 0 0 0 0 2 0 0 0 0 0 3 0 0 0 0 0 4 0 0 0 0 0 5

3 October 2021