Using Scanner class to calculate the total number of words within a string

import java.util.*;
public class TotalWords{

Scanner scan=new Scanner(System.in);
String text;

public void input(){

try{

System.out.printf("Enter A String: ");
text=scan.nextLine();

} catch(InputMismatchException e){

System.err.println("Error Occurred!\n"+e.getMessage());
System.exit(0);

}

}

public void compute(){

scan=new Scanner(text);
long total=0;
while(scan.hasNext()){
scan.next();
total++;
}
System.out.println("Total Number of Words: "+total);

}

public static void main(String[] args){

TotalWords TW=new TotalWords();
TW.input();
TW.compute();

}

}