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Java String Exercises: Return true if a given string contain the string 'pop', but the middle 'o' also may other character

Java String: Exercise-72 with Solution

Write a Java program to return true if a given string contain the string 'pop', but the middle 'o' also may other character.

Sample Solution:

Java Code:

import java.util.*;
public class Main
{
public boolean popInTheString(String stng) 
{
  int len = stng.length();
  for (int i = 0; i < len - 2; i++) 
  {
    if (stng.charAt(i) == 'p' && stng.charAt(i+2) == 'p')
    return true;
  }
  return false;
}
public static void main (String[] args)
    {
      Main m= new Main();
      String str1 =  "dikchapop";
      System.out.println("The given string is: "+str1);
      System.out.println("Is p?p appear in the given string? "+m.popInTheString(str1));
	  }
}

Sample Output:

The given string is: dikchapop
Is p?p appear in the given string? true

The given string is: dikp$pdik
Is p?p appear in the given string? true

Pictorial Presentation:

Java String Exercises: Return true if a given string contain the string 'pop', but the middle 'o' also may other character

Flowchart:

Flowchart: Java String Exercises - Return true if a given string contain the string 'pop', but the middle 'o' also may other character

Java Code Editor:

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Previous: Write a Java program to check two given strings whether any one of them appear at the end of the other string (ignore case sensitivity).
Next: Write a Java program to check whether a substring appears before a period(.) within 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