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Java String Exercises: Check the number of appearances of the two substrings appear anywhere in the string

Java String: Exercise-90 with Solution

Write a Java program to check the number of appearances of the two substrings appear anywhere in the string.

Sample Solution:

Java Code:

import java.util.*;
public class Main
{
public boolean isAndTheEquality(String stng) 
{
  int l = stng.length();
  int st_the = 0;
  int st_is = 0;
  for (int i = 0; i < l; i++) 
  {
    if (i < l - 2) 
	{
      String tmp = stng.substring(i,i+3);
      if (tmp.equals("the"))
        st_the++;
    }
    if (i < l - 1) 
	{
      String tmp2 = stng.substring(i,i+2);
      if (tmp2.equals("is"))
        st_is++;
    }
  }
  if (st_the == st_is)
    return true;
  else
    return false;
}

public static void main (String[] args)
    {
      Main m= new Main();
      String str1 =  "Thisisthethesis";
      System.out.println("The given string is: "+str1);
      System.out.println("Are the appearance of 'the' and 'is' equal? "+m.isAndTheEquality(str1));
	  }
}

Sample Output:

The given string is: Thisisthethesis
Are the appearance of 'the' and 'is' equal? false

Pictorial Presentation:

Java String Exercises: Return true if the number of appearances of 'the' and 'is' anywhere in the string is equal

Flowchart:

Flowchart: Java String Exercises - Return true if the number of appearances of 'the' and 'is' anywhere in the string is equal

Java Code Editor:

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Next: Write a Java program to count the number of words ending in 'm' or 'n' (not case sensitive) in a given text.

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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