Java: 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

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:

Java Code Editor:
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Java: Tips of the Day
Oddness Check
Is it possible to use this code to accurately determine the odd number?
public boolean oddOrNot(int num) { return num % 2 == 1; }
I hope you noticed a trick. If we decide to check a negative odd number in such a way (-5, for example), the remainder of the division will not be equal to one (what does it mean?) Therefore, use a more accurate method:
public boolean oddOrNot(int num) { return (num & 1) != 0; }
It not only solves the problem of negative numbers, but also works more productively than its predecessor. Arithmetic and logical operations are performed much faster than multiplication and division.
Ref: https://bit.ly/3giyonA
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