In this post we will learn how to reverse a string in java.
Problem
Here is example of the problem –
Example 1:
Input : s = "abc" Output : s = "cba"
Example 2:
Algorithm to Reverse a String:
- Take or input a String.
- store it in variable “s”.
- Take a string rev and initialize with empty string.
- start i loop start from i=length()-1 to i>=0.
- get one by one character and store it in rev.
- And last print rev.
Program for reverse a string:
import java.util.Scanner;
class Main{
public static void main(String[]args){
Scanner sc =new Scanner(System.in);
System.out.println("Enter a string");
String s= sc.nextLine();
String rev="";
for(int i=s.length-1;i>=0;i--){
rev=rev+s.charAt(i);
}
System.out.println("Reverse string is="+rev)
}
}
// Output:
Enter a String
abc
Reverse string is =cba
More java string programs:
Java Program to Get Input from User
Java Program to check a String is Palindrome or not
Java program to Count the Total number of Characters in a String