Java: Create a new string from a given string after removing the 2nd character from the substring of length three starting with 'z' and ending with 'g' presents in the said string

Last update on May 21 2025 12:48:40 (UTC/GMT +8 hours)

79. Remove Middle Char in 'z?g' Pattern

Write a Java program to create a string from a given string. This is done after removing the 2nd character from the substring of length three starting with 'z' and ending with 'g' presents in the said string.

Visual Presentation:

Sample Solution:

Java Code:

import java.util.*;

// Define a class named Main
public class Main {

  // Method to create a new string following the Kit-Kat pattern
  public String kitKatPattern(String stng) {
    int len = stng.length(); // Get the length of the given string 'stng'
    String newformstring = ""; // Initialize an empty string to store the new formed string

    // Loop through each character in the given string 'stng'
    for (int i = 0; i < len; i++) {
      newformstring += stng.substring(i, i + 1); // Add each character to the new formed string 'newformstring'

      // Check if the current character is neither the first nor the last character of the string
      if (i > 0 && i < len - 1) {
        // Check if the previous character is 'z' and the next character is 'g'
        if (stng.charAt(i - 1) == 'z' && stng.charAt(i + 1) == 'g') {
          newformstring = newformstring.substring(0, newformstring.length() - 1); // Remove the last character added to 'newformstring'
        }
      }
    }
    return newformstring; // Return the new formed string
  }

  // Main method to execute the program
  public static void main(String[] args) {
    Main m = new Main(); // Create an instance of the Main class

    String str1 = "zzgkitandkatcaketoket"; // Given string

    // Display the given string and the new string formed following the Kit-Kat pattern
    System.out.println("The given string is: " + str1);
    System.out.println("The new string is: " + m.kitKatPattern(str1));
  }
}

Sample Output:

The given string is: zzgkitandkatcaketoket
The new string is: zgkitandkatcaketoket

Flowchart:

For more Practice: Solve these Related Problems:

• Write a Java program to detect a substring starting with 'z' and ending with 'g', then remove its second character.
• Write a Java program to find the first occurrence of a pattern matching "z?g" and modify it by omitting the middle character.
• Write a Java program to scan a string for a specific "z...g" pattern and remove the second character from that segment.
• Write a Java program to manipulate a substring defined by a 'z' to 'g' pattern by deleting its central character.

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