How to reverse a number in java

Java code to reverse a given number




import java.io.*;

class Test {

          public static void main(String[] args) throws IOException {

              int num,sum=0,r;

              System.out.println("Enter a number");

              BufferedReader br=new BufferedReader(new InputStreamReader (System.in));

              num=Integer.parseInt(br.readLine());

              while(num!=0){

                   r=num%10;

                   sum=sum*10+r;

                   num=num/10;

              }

              System.out.println("Reverse number="+sum);

          }

}

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