Question

How do I create a simple java program file that opens and reads a file using java.io? I have the file Im supposed to open and read but I dont know how to code it to open and read the file?

Answer 1

package abcSolution1;

import java.io.File;

import java.io.FileNotFoundException;

import java.net.URISyntaxException;

import java.net.URL;

import java.util.Scanner;

public class ReadFile {

public static void main(String[] args) {

// create scanner to get filename from keyboard

Scanner sc=new Scanner(System.in);

System.out.println("Enter file name");

// gettin input from user

String fileName=sc.nextLine();

// creating url object for the file

URL url=ReadFile.class.getResource(fileName);

try {

// creating file object based on the url

File file = new File(url.toURI());

// creating scanner on file

sc=new Scanner(file);

// check if file has another line to be read

while(sc.hasNextLine()) {

// read another line and print that

System.out.println(sc.nextLine());

}

} catch (URISyntaxException e) {

e.printStackTrace();

} catch (FileNotFoundException e) {

e.printStackTrace();

}

}

}