﻿ Java - Compare two strings of length 3 and 4 in a string

# Java: Check whether two strings of length 3 and 4 appear in same number of times in a given string

## Java String: Exercise-81 with Solution

Write a Java program to check whether two strings of length 3 and 4 appear the same number of times in a given string.

Visual Presentation: Sample Solution:

Java Code:

``````import java.util.*;

// Define a class named Main
public class Main {

// Method to check the equal appearance of "red" and "blue" substrings in the given string 'stng'
public boolean checkSameAppearance(String stng) {
int l = stng.length(); // Get the length of the given string 'stng'
int red = 0; // Initialize a counter for "red" substring occurrences
int blue = 0; // Initialize a counter for "blue" substring occurrences

// Loop to check for "red" substring occurrences
for (int i = 0; i < l - 2; i++) {
String tmp = stng.substring(i, i + 3); // Extract a substring of length 3 starting at index 'i'

// Check if the extracted substring is equal to "red"
if (tmp.compareTo("red") == 0)
red++; // Increment the count of "red" substring occurrences
}

// Loop to check for "blue" substring occurrences
for (int i = 0; i < l - 3; i++) {
String tmp = stng.substring(i, i + 4); // Extract a substring of length 4 starting at index 'i'

// Check if the extracted substring is equal to "blue"
if (tmp.compareTo("blue") == 0)
blue++; // Increment the count of "blue" substring occurrences
}

// Check if the count of "red" and "blue" substrings are the same
if (red == blue)
return true; // Return true if the counts are equal
else
return false; // Return false if the counts are not equal
}

// 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 = "redcapmanwithbluecar"; // Given string

// Display the given string and the result of equal appearance of "red" and "blue" substrings
System.out.println("The given string is: " + str1);
System.out.println("The appearance of red and blue are same: " + m.checkSameAppearance(str1));
}
}
``````

Sample Output:

```The given string is: redcapmanwithbluecar
The appearance of red and blue are same: true
```

Flowchart: Java Code Editor:

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