This is the first solution to find the reverse of an integer value using the StringBuilder (mutable) class type.
import java.util.Scanner;
public class ReverseOfInt {
public static void main(String[] args) {
// TODO Auto-generated method stub
@SuppressWarnings("resource")
Scanner inpInt= new Scanner(System.in);
//Input an Integer
System.out.println("Enter an Integer=");
int numValue=inpInt.nextInt();
System.out.println("The integer is="+numValue);
// Convert Integer to String
StringBuilder int2Str=new StringBuilder(String.valueOf(numValue));
String revStr=int2Str.reverse().toString();
// Convert the reversed String to original integer
System.out.println("The integer after reverse is="+Integer.parseInt(revStr));
}
}
Output:
Enter an Integer=
124
The integer is=124
The integer after reverse is=421

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