Read a line from specific line until the end of file

Question

I want to read from specific line and so on. For instance I want to read from line 8 and until it gets to the end of the file. Could someone teach me the proper way on how to program it?

My current code:

import java.util.*;
import java.io.File;
import java.io.FileNotFoundException;

public class Arff {
    public static void main(String[] args) throws FileNotFoundException {

        File TextFile = new File("weather.nominal.arff");
        Scanner reader = new Scanner(TextFile);

        while(reader.hasNextLine()) {
            String text = reader.nextLine();
            String[] SplitData = text.split(" ");

            if (SplitData[0].equals("@relation")) {
                System.out.println(SplitData[1]);
                System.out.println();
            }
            if (SplitData[0].equals("@attribute")) {
                System.out.print(SplitData[1] + " ");
            }
        }
    }
}

weather.nominal.arff

@relation weather.symbolic
@attribute outlook {sunny, overcast, rainy}
@attribute temperature {hot, mild, cool}
@attribute humidity {high, normal}
@attribute windy {TRUE, FALSE}
@attribute play {yes, no}

@data
sunny,hot,high,FALSE,no
sunny,hot,high,TRUE,no
overcast,hot,high,FALSE,yes
rainy,mild,high,FALSE,yes
rainy,cool,normal,FALSE,yes
rainy,cool,normal,TRUE,no
overcast,cool,normal,TRUE,yes
sunny,mild,high,FALSE,no
sunny,cool,normal,FALSE,yes
rainy,mild,normal,FALSE,yes
sunny,mild,normal,TRUE,yes
overcast,mild,high,TRUE,yes
overcast,hot,normal,FALSE,yes
rainy,mild,high,TRUE,no

Desired output:

weather.symbolic

outlook temperature humidity windy play

sunny,hot,high,FALSE,no
sunny,hot,high,TRUE,no
overcast,hot,high,FALSE,yes
rainy,mild,high,FALSE,yes
rainy,cool,normal,FALSE,yes
rainy,cool,normal,TRUE,no
overcast,cool,normal,TRUE,yes
sunny,mild,high,FALSE,no
sunny,cool,normal,FALSE,yes
rainy,mild,normal,FALSE,yes
sunny,mild,normal,TRUE,yes
overcast,mild,high,TRUE,yes
overcast,hot,normal,FALSE,yes
rainy,mild,high,TRUE,no

Your problem doesn't seem to match your question. For starters, there aren't even 32 lines in your input file. — Erick G. Hagstrom, Sep 28 '15 at 02:29
Your desired output is *not* skipping the first lines, it is transforming them and *including* them in the output. So your question does not match your expected input/output at all. — Erwin Bolwidt, Sep 28 '15 at 03:02

score 0 · Answer 1 · answered Sep 28 '15 at 03:20

Regarding your question: if you know the lines you want to skip, just define a counter variable before the loop and count the lines you read in the loop.

int count = 0;
while {
//....
  if (count >=8){
  //...
  }
  count++;
}

regarding the example data, you could also use a boolean variable outside the loop and store wether @data was already read - this would be better if the line index is not known already or could change over time.

Read a line from specific line until the end of file

1 Answers1