Java Text File Read Line readLinesTrimmedNoComment(final String fileName, final String commentString)

Description

read Lines Trimmed No Comment

License

Apache License

Declaration

public static String[] readLinesTrimmedNoComment(final String fileName, final String commentString)
            throws FileNotFoundException, IOException 

Method Source Code

//package com.java2s;
//License from project: Apache License 

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStreamReader;

import java.util.ArrayList;

public class Main {
    public static String[] readLinesTrimmedNoComment(final String fileName, final String commentString)
            throws FileNotFoundException, IOException {
        File wtsFile = new File(fileName);
        if (!wtsFile.isFile())
            throw new FileNotFoundException("Cannot find file for reading: " + fileName);

        FileInputStream fin = null;
        BufferedReader in = null;
        try {/*www . j  a va 2 s.  c o m*/
            fin = new FileInputStream(wtsFile);
            in = new BufferedReader(new InputStreamReader(fin));
        } catch (IOException e) {
            throw new IOException("IOException during reading of text file: " + fileName);
        }

        return readLinesTrimmedNoCommmentFromBufferedReader(in, commentString);
    }

    private static String[] readLinesTrimmedNoCommmentFromBufferedReader(final BufferedReader in,
            final String commentString) throws IOException {
        ArrayList<String> lineList = new ArrayList<String>();
        String line;
        while (in.ready()) {
            line = in.readLine();
            if (line == null) {
                continue;
            }

            line = line.trim();

            if (line.startsWith(commentString))
                continue;

            if (line.contains(commentString)) {
                String[] items = line.split(commentString);
                line = items[0].trim();
            }

            lineList.add(line);
        }

        in.close();

        String[] lines = new String[lineList.size()];

        lineList.toArray(lines);

        return lines;
    }
}

Related

1. readLinesAsList(String filename)
2. readLinesFileSimple(final File inFile, final int prefixMode, final String prefix)
3. readLinesFromCommand(String command[], List buffer)
4. readLinesNoComments(String fileName)
5. readLinesRaw(final File inFile)
6. readLinesWithPattern(File file, Pattern pattern)