Q. Write a Java program to reverse a string without using any string API.
Answer:
StringBuilder class provides a reverse() method to reverse the string. But in this example, we are using loop and charAt() methods to reverse the given string.
Output:
Answer:
StringBuilder class provides a reverse() method to reverse the string. But in this example, we are using loop and charAt() methods to reverse the given string.
ReverseString.java
import java.util.*;
class ReverseString
{
public static void main(String args[])
{
String original, reverse = "";
Scanner in = new Scanner(System.in);
System.out.print("Enter a string to reverse: ");
original = in.nextLine();
int length = original.length();
for ( int i = length - 1 ; i >= 0 ; i-- )
reverse = reverse + original.charAt(i);
System.out.println("Reverse of entered string is: "+reverse);
}
}
Output:
