How to Split a String into Equal Length Substrings in Java

How can I split the string "Thequickbrownfoxjumps" into substrings of equal size in Java?

String str = "Thequickbrownfoxjumps";
int length = 4;

To split a string into equal length substrings in Java, you can utilize a loop to partition the string based on a specified length. This method involves iterating through the string and creating substrings of the desired length until the entire string is processed.

import java.util.ArrayList;
import java.util.List;

public class Main {
    public static void main(String[] args) {
        String str = "Thequickbrownfoxjumps";
        int length = 4;
        List<String> substrings = splitIntoSubstrings(str, length);
        System.out.println(substrings);
    }

    public static List<String> splitIntoSubstrings(String str, int length) {
        List<String> result = new ArrayList<>();
        for (int i = 0; i < str.length(); i += length) {
            if (i + length > str.length()) {
                result.add(str.substring(i)); // Add remaining characters
            } else {
                result.add(str.substring(i, i + length));
            }
        }
        return result;
    }
}

Causes

• String length not divisible by the substring length may result in shorter final substring.
• Incorrect index handling could lead to substring boundaries being violated.

Solutions

• Utilize a loop structure that checks characters within the bounds of the string length.
• Employ String's substring method to generate equal-length parts correctly.

Mistake: Miscalculating the end index in substring method leading to IndexOutOfBoundsException.

Solution: Ensure your loop condition accurately checks if the index plus the substring length exceeds original string length.

Mistake: Ignoring the last portion of the string if its length is shorter than the specified substring length.

Solution: Add a check to include any remaining characters not included in previous iterations.