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Java String Exercises: New string after removing a specified character from a given string except the first and last position

Java String: Exercise-96 with Solution

Write a Java program to create a new string after removing a specified character from a given string except the first and last position.

Sample Solution:

Java Code:

import java.util.*;
public class Main
{
public String removeAllZ(String stng) 
{
  String fin_str = "";
  int l = stng.length();
  for (int i = 0; i < l; i++)
  {
    char temp = stng.charAt(i);
    if (!(i > 0 && i < l - 1 && temp == 'z'))
      fin_str = fin_str + temp;
  }
    return fin_str;     
}

public static void main (String[] args)
    {
      Main m= new Main();
      String str1 =  "zebrazone";
      System.out.println("The given string is: "+str1);
      System.out.println("The new string is: "+m.removeAllZ(str1));
	  }
}

Sample Output:

The given string is: zebrazone
The new string is: zebraone

Pictorial Presentation:

Java String Exercises: Return the string after removing all 'z' (except the very first and last) from a given string

Flowchart:

Flowchart: Java String Exercises - Return the string after removing all 'z' (except the very first and last) from a given string

Java Code Editor:

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Previous: Write a Java program to return the sum of the digits present in the given string.If there is no digits the sum return is 0.
Next: Write a Java program to return a string with the characters of the index position 0,1,2, 5,6,7, ... from 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