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Thread: reading a file line by line

  1. #1
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    Default reading a file line by line

    import java.io.File;
    		import java.io.FileNotFoundException;
    	//	import java.io.FileReader;
    		//import java.io.IOException;
    		import java.util.Scanner;
    public class test1 {
     
    	/**
    	 * @param args
    	 * @throws FileNotFoundException 
    	 */
    	public static void main(String[] args) throws FileNotFoundException {
     
     
    					Scanner scan = new Scanner(new File("F:\\data\\file.txt"));
     
    					while(scan.hasNext()){
    						 String line = scan.nextLine();
    						 System.out.println(line);
    					}
     
     
    			}
    }
    when i execute the above code, am getting the error as below.Pls let me know what's wrong with my code.
    at java.io.FileInputStream.open(Native Method)
    	at java.io.FileInputStream.<init>(FileInputStream.java:120)
    	at java.util.Scanner.<init>(Scanner.java:636)
    	at test1.main(test1.java:23)


  2. #2
    Crazy Cat Lady KevinWorkman's Avatar
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    Default Re: reading a file line by line

    You've left out the most important part of the stack trace, the Exception itself. Please copy the entire stack trace, including what type of Exception it was.

    The type of Exception (FileNotFoundException, NullPointerException, etc) will tell you quite a bit about what's going wrong, as well as give you something to google.
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  3. #3
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    Default Re: reading a file line by line

    It seems to work for me. Check yours is finding the file.

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    Default Re: reading a file line by line

    This code is work for me. you are get FileNotFoundException.
    So you check your file path.
    Put correct file path.
    Regards
    Android developer
    Trinay Technology Solutions
    http://www.trinaytech.com
    5705750475

  5. #5
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    Default Re: reading a file line by line

    I have put the correct path,but still it isn't working.

  6. #6
    Super Moderator Norm's Avatar
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    Default Re: reading a file line by line

    Please post the FULL text of the error message.
    If you don't understand my answer, don't ignore it, ask a question.

  7. The Following User Says Thank You to Norm For This Useful Post:

    shenaz (March 20th, 2013)

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    Default Re: reading a file line by line

    refer this link:File I/O
    Regards
    Android developer
    Trinay Technology Solutions
    http://www.trinaytech.com
    5705750475

  9. The Following User Says Thank You to Tamilarasi For This Useful Post:

    shenaz (March 20th, 2013)

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    Default Re: reading a file line by line

    Also post the text file you are reading from (if it's long, just 10 lines will do).

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    Default Re: reading a file line by line

    Thank you all for responding.I solved the problem i was facing.

  12. #10
    Super Moderator Norm's Avatar
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    Default Re: reading a file line by line

    Please mark this thread as solved.
    If you don't understand my answer, don't ignore it, ask a question.

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