Java - EXAMEN_LAB

import java.io.BufferedReader;
import java.io.FileReader;
import java.util.*;

import javax.swing.JOptionPane;

public class Raiz {


public static void main(String [] arg) {

//Programa funciona con fichero ejercicio 2 (En D:/arxiu.txt)

int i;
double suma=0;

try {

FileReader lectura = new FileReader ("D:/arxiu.txt");
BufferedReader buffer = new BufferedReader(lectura);

String linea=buffer.readLine();
if (linea !=null){
while(linea!=null){

String line[]=linea.split("=");
int num= Integer.parseInt(line[1]);

double raiz=Math.sqrt(num);

linea=buffer.readLine();
suma = suma + raiz;
}

buffer.close();
}

FileReader lectura1 = new FileReader ("D:/arxiu.txt");
BufferedReader buffer1 = new BufferedReader(lectura1);

JOptionPane.showMessageDialog(null,"Suma de raíces = " + suma);


}
catch(Exception e){
System.out.println(e);
}

}
}