This java program reverses a string entered by the user. We use charAt method to extract characters from the string and append them in reverse order to reverse the entered string.
Java programming code
import java.util.*;
class ReverseString
{
public static void main(String args[])
{
String original, reverse = "";
Scanner in = new Scanner(System.in);
System.out.println("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 of program:
Reverse string using StringBuffer class
class InvertString
{
public static void main(String args[])
{
StringBuffer a = new StringBuffer("Java programming is fun");
System.out.println(a.reverse());
}
}
StringBuffer class contains a method reverse which can be used to reverse or invert an object of this class.
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