Java help - Reading from a text file

Duff Man Jr.

Hi, im new to java and i need to write a program to read from a text file, then to go through each line one by one and select the line that satisify's a certain condition.

Any help appricated.

Thanks

henbane

Sun's IO Tutorial

sicruise

Throw the man a bone )

Here you can use this here... I just wrote it for you there quickly so it probably isn't the best code in the world but it will give you an idea.

import java.io.*;

public class ReadFromFile{


           public static void main(String a[]) {


               //Read in the string from request file line by line

               try

               {

               		String str="";

              		String reader="";

              		FileReader fr = new FileReader(a[0]);

             		BufferedReader br = new BufferedReader(fr);

              		while ((reader = br.readLine()) != null)
			{
				str += reader + "\n";
			}

               		System.out.println(str);

			br.close();
		}

               //Catch exceptions

		catch (FileNotFoundException fnfe)
		{

			System.out.println(fnfe.getMessage());

               	}

		catch (IOException e)
	       	{

                	System.out.println(e.getMessage());

           	}
		catch (ArrayIndexOutOfBoundsException e)
		{

			System.out.println("Usage: java ReadFromFile filename");

		}



           }

}

Hobbes

For all the examples you will ever need...

http://www.java2s.com/Code/Java/CatalogJava.htm

Note: Copying anything there verbatim will almost likely get you 100% fail in a test.

Evil Phil

Ahem :rolleyes: tut tut *wags finger*

sicruise

Yea I know... I was just bored and felt sorry for him