Sort a String in Java – Easy Guide with Example

Sorting a string in Java is a common task in programming, especially when you need to arrange characters alphabetically or check for anagrams. Since strings in Java are immutable, we must first convert them into a character array, sort them, and then convert them back into a string.

Example Code

import java.util.Arrays;

public class SortString {
    public static void main(String[] args) {
        String str = "sandip";
        char[] chars = str.toCharArray();
        Arrays.sort(chars);
        String sortedStr = new String(chars);
        System.out.println("Sorted String: " + sortedStr);
    }
}

Output

Sorted String: adinps

Key Points

• Use Arrays.sort() to arrange characters in ascending order.
• Convert the string to lowercase before sorting for case-insensitive results.
• Works for any string, including those with numbers and symbols.

FAQs – Sort a String in Java

1. How do you sort string in Java alphabetically?
Convert the string to a char[] array, use Arrays.sort() to sort it, and then create a new string from the sorted array.

2. Can we sort a string directly in Java?
No. Strings in Java are immutable, so you cannot change them directly. You must convert them into a character array before sorting.

3. How do I sort a string in reverse order in Java?
After sorting with Arrays.sort(), reverse the array using a loop or use Collections.reverseOrder() with a list of characters.

4. How can I sort a string without considering case (case-insensitive)?
Convert the string to lowercase (or uppercase) before sorting to ensure case-insensitive results.

5. Does Arrays.sort() sort by ASCII or alphabetical order?
Arrays.sort() sorts characters based on their Unicode values, which means uppercase letters come before lowercase letters.

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