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Java Exercises: Reverse a string

Java Basic: Exercise-37 with Solution

Write a Java program to reverse a string.

Test Data:
Input a string: The quick brown fox

Pictorial Presentation: Reverse a string

Java: Reverse a string

Sample Solution:

Java Code:

import java.util.Scanner;
public class Exercise37 {
     public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.print("Input a string: ");
        char[] letters = scanner.nextLine().toCharArray();
        System.out.print("Reverse string: ");
        for (int i = letters.length - 1; i >= 0; i--) {
            System.out.print(letters[i]);
        }
        System.out.print("\n");
    }
}

Sample Output:

Input a string: The quick brown fox                      
Reverse string: xof nworb kciuq ehT

Flowchart:

Flowchart: Java exercises: Reverse a string

Java Code Editor:

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Next: Write a Java program to count the letters, spaces, numbers and other characters of an input string.

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Java: Tips of the Day

How to convert a char array back to a string?

char[] a = {'h', 'e', 'l', 'l', 'o', ' ', 'w', 'o', 'r', 'l', 'd'};
String b = new String(a);

Note however, that this is a very unusual situation: Because String is handled specially in Java, even "foo" is actually a String. So the need for splitting a String into individual chars and join them back is not required in normal code.

Ref: https://bit.ly/39x7Trn