CODEWITHSUNDEEP
java
user2976322
user2976322

Reputation: 11

Loop is not working

this code is to be used to write the data inserted in to a file when the loop runs the second student dont get entered i dont know why this keeps getting stuck at the second student and i have been working on this for hours

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

class wonder
{
public static void main(String args[]) throws IOException
{
    Scanner c = new Scanner(System.in);

    FileWriter ww = new FileWriter("D:\\student details.txt");
    BufferedWriter o = new BufferedWriter(ww);

    int counter = 0 ;
    int stnum = 1;

    while(counter < 4)
    {
        String name = "";
        int marks = 0;

        System.out.print("Enter student " + stnum + " name : " );
        name = c.nextLine();

        System.out.print("Enter marks : ");
        marks = c.nextInt();

        ww.write(stnum + " " + name + " " + marks );
        ww.close();

        counter++;
        stnum++;

    }


}
}

Upvotes: 0

Views: 61

Answers (3)

Nidhish Krishnan
Nidhish Krishnan

Reputation: 20741

Things to do

put ww.close(); outside the while loop
change c.nextLine(); to c.next();

import java.util.Scanner;
import java.io.*;
class wonder
{
public static void main(String args[]) throws IOException
{
    Scanner c = new Scanner(System.in);
    FileWriter ww = new FileWriter("D:\\student details.txt");
    BufferedWriter o = new BufferedWriter(ww);
    int counter = 0 ;
    int stnum = 1;
    while(counter < 4)
    {

        String name = "";
        int marks = 0;
        System.out.print("Enter student " + stnum + " name : " );
        name = c.next();

        System.out.print("Enter marks : ");
        marks = c.nextInt();

        ww.write(stnum + " " + name + " " + marks );

        counter++;
        stnum++;

    }
  ww.close();
}
}

Upvotes: 0

Cubic
Cubic

Reputation: 15673

You close your FileWriter in each iteration of your while loop... what did you think would happen?

Upvotes: 3

Dylan Meeus
Dylan Meeus

Reputation: 5802

you close the writer in the loop, move the close statement outside of the loop

ww.close();

Upvotes: 1

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