(URI) Distância Entre Dois Pontos - Solução

import java.io.*;
import java.util.*;

class Main  {
    public static void main(String[] args) throws NumberFormatException, IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
   
        String linha = br.readLine();
        StringTokenizer tokenizer = new StringTokenizer(linha);           
        double x1 = Double.parseDouble(tokenizer.nextToken());
        double y1 = Double.parseDouble(tokenizer.nextToken());
       
        linha = br.readLine();
        tokenizer = new StringTokenizer(linha);           
        double x2 = Double.parseDouble(tokenizer.nextToken());
        double y2 = Double.parseDouble(tokenizer.nextToken());
       
        double distancia = Math.sqrt((x2-x1)*(x2-x1) + (y2-y1)*(y2-y1));
       
        System.out.printf("%.4f\n", distancia);
    }
}