Java Programs - Solved 2020 ICSE Computer Science Paper

import java.util.Scanner;
class Display{
    public static void main(String[] args){
        Scanner in = new Scanner(System.in);
        System.out.print("Enter the sentence: ");
        String s = in.nextLine().toUpperCase();
        String w = "";
        for(int i = 0; i < s.length(); i++){
            char ch = s.charAt(i);
            if(Character.isLetterOrDigit(ch))
                w += ch;
            else{
                System.out.println(w);
                w = "";
            }
        }
    }
}