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Java String Exercises: 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

Java String: Exercise-79 with Solution

Write a Java program to 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.

Sample Solution:

Java Code:

import java.util.*;
public class Main
{
public String kitKatPattern(String stng) 
{
  int len = stng.length();
  String newformstring = "";
  for (int i = 0; i < len; i++) 
  {
    newformstring += stng.substring(i,i+1);
    if (i > 0 && i < len-1) 
	{
      if (stng.charAt(i-1) == 'z' && stng.charAt(i+1) == 'g')
        newformstring = newformstring.substring(0,newformstring.length()-1);
    }
  }
  return newformstring;
}
public static void main (String[] args)
    {
      Main m= new Main();
      String str1 =  "zzgkitandkatcaketoket";
      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

Pictorial Presentation:

Java String Exercises: Return the given string after removing the 2nd character from the substring of length three, starting with 'z' and ending with 'g'

Flowchart:

Flowchart: Java String Exercises - Return the given string after removing the 2nd character from the substring of length three, starting with 'z' and ending with 'g'

Java Code Editor:

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Next: Write a Java program to check whether the character immediately before and after a specified character is same in a given string.

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Java: Tips of the Day

Array vs ArrayLists:

The main difference between these two is that an Array is of fixed size so once you have created an Array you cannot change it but the ArrayList is not of fixed size. You can create instances of ArrayLists without specifying its size. So if you create such instances of an ArrayList without specifying its size Java will create an instance of an ArrayList of default size.

Once an ArrayList is full it re-sizes itself. In fact, an ArrayList is internally supported by an array. So when an ArrayList is resized it will slow down its performance a bit as the contents of the old Array must be copied to a new Array.

At the same time, it's compulsory to specify the size of an Array directly or indirectly while creating it. And also Arrays can store both primitives and objects while ArrayLists only can store objects.

Ref: https://bit.ly/3o8L2KH